Vulnerability-Lookup

UBUNTU-CVE-2020-6096 (CVE-2020-6096)

Vulnerability from osv_ubuntu – Published: 2020-04-01 22:15 – Updated: 2026-04-22 07:39 – Source website

Details

An exploitable signed comparison vulnerability exists in the ARMv7 memcpy() implementation of GNU glibc 2.30.9000. Calling memcpy() (on ARMv7 targets that utilize the GNU glibc implementation) with a negative value for the 'num' parameter results in a signed comparison vulnerability. If an attacker underflows the 'num' parameter to memcpy(), this vulnerability could lead to undefined behavior such as writing to out-of-bounds memory and potentially remote code execution. Furthermore, this memcpy() implementation allows for program execution to continue in scenarios where a segmentation fault or crash should have occurred. The dangers occur in that subsequent execution and iterations of this code will be executed with this corrupted data.

Severity

8.1 (High)


                    
                      CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

8.1 (High)


                    
                      CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

N/A (UNKNOWN)

low

References

URL

Type

	https://ubuntu.com/security/CVE-2020-6096	REPORT
	https://talosintelligence.com/vulnerability_repor…	REPORT
	https://ubuntu.com/security/notices/USN-4954-1	ADVISORY
	https://ubuntu.com/security/notices/USN-5310-1	ADVISORY
	https://www.cve.org/CVERecord?id=CVE-2020-6096	REPORT

JSON

To clipboard

{
  "affected": [
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      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "eglibc-source",
            "binary_version": "2.19-0ubuntu6.15+esm4"
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        "2.23-0ubuntu5",
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        "2.23-0ubuntu7",
        "2.23-0ubuntu9",
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          },
          {
            "binary_name": "libc-bin",
            "binary_version": "2.27-3ubuntu1.5"
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            "binary_name": "libc6-armel",
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          },
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            "binary_version": "2.27-3ubuntu1.5"
          },
          {
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          {
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            "binary_version": "2.27-3ubuntu1.5"
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            "binary_version": "2.27-3ubuntu1.5"
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            "binary_name": "libc6-dev-x32",
            "binary_version": "2.27-3ubuntu1.5"
          },
          {
            "binary_name": "libc6-i386",
            "binary_version": "2.27-3ubuntu1.5"
          },
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            "binary_name": "libc6-lse",
            "binary_version": "2.27-3ubuntu1.5"
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      },
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          ],
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      ],
      "versions": [
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        "2.30-0ubuntu3",
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        "2.31-0ubuntu7",
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        "2.31-0ubuntu9.1",
        "2.31-0ubuntu9.2",
        "2.31-0ubuntu9.3"
      ]
    }
  ],
  "aliases": [],
  "details": "An exploitable signed comparison vulnerability exists in the ARMv7 memcpy() implementation of GNU glibc 2.30.9000. Calling memcpy() (on ARMv7 targets that utilize the GNU glibc implementation) with a negative value for the \u0027num\u0027 parameter results in a signed comparison vulnerability. If an attacker underflows the \u0027num\u0027 parameter to memcpy(), this vulnerability could lead to undefined behavior such as writing to out-of-bounds memory and potentially remote code execution. Furthermore, this memcpy() implementation allows for program execution to continue in scenarios where a segmentation fault or crash should have occurred. The dangers occur in that subsequent execution and iterations of this code will be executed with this corrupted data.",
  "id": "UBUNTU-CVE-2020-6096",
  "modified": "2026-04-22T07:39:18Z",
  "published": "2020-04-01T22:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-6096"
    },
    {
      "type": "REPORT",
      "url": "https://talosintelligence.com/vulnerability_reports/TALOS-2020-1019"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-4954-1"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-5310-1"
    },
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      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2020-6096"
    }
  ],
  "related": [
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  "schema_version": "1.7.0",
  "severity": [
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      "score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "low",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2020-6096"
  ]
}

CVE-2020-6096 (GCVE-0-2020-6096)

Vulnerability from cvelistv5 – Published: 2020-04-01 00:00 – Updated: 2026-10-14 08:06

Summary

Severity

8.1 (High)


                        
                          CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-02-13 20:06 UTC

CWE

CWE-195 - Signed to Unsigned Conversion Error

Assigner

talos CNA under the mitre root

CNA scorecard – unranked: 8 records in the last 180 days, 10 needed details

References

8 references

URL	Tags
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
https://security.gentoo.org/glsa/202101-20	vendor-advisory
https://lists.apache.org/thread.html/rf9fa47ab664…	mailing-list
https://sourceware.org/bugzilla/show_bug.cgi?id=25620
https://www.talosintelligence.com/vulnerability_r…
https://lists.debian.org/debian-lts-announce/2022…	mailing-list
https://cert-portal.siemens.com/productcert/html/…

Impacted products

4 products

Vendor	Product	Version
n/a	GNU glibc	Affected: 2.30.9000
Siemens	SIMATIC S7-1500 CPU 1518-4 PN/DP MFP	Affected: V3.1.0 , < V3.1.5 (custom)
Siemens	SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP	Affected: V3.1.0 , < V3.1.5 (custom)
Siemens	SIPLUS S7-1500 CPU 1518-4 PN/DP MFP	Affected: V3.1.0 , < V3.1.5 (custom)

Show details on NVD website

JSON

To clipboard

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            "vendor": "Siemens",
            "versions": [
              {
                "lessThan": "V3.1.5",
                "status": "affected",
                "version": "V3.1.0",
                "versionType": "custom"
              }
            ]
          },
          {
            "defaultStatus": "unknown",
            "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP",
            "vendor": "Siemens",
            "versions": [
              {
                "lessThan": "V3.1.5",
                "status": "affected",
                "version": "V3.1.0",
                "versionType": "custom"
              }
            ]
          },
          {
            "defaultStatus": "unknown",
            "product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP",
            "vendor": "Siemens",
            "versions": [
              {
                "lessThan": "V3.1.5",
                "status": "affected",
                "version": "V3.1.0",
                "versionType": "custom"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-10-14T08:06:59.641Z",
          "orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e",
          "shortName": "siemens-SADP"
        },
        "references": [
          {
            "url": "https://cert-portal.siemens.com/productcert/html/ssa-398330.html"
          }
        ],
        "x_adpType": "supplier"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "GNU glibc",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "2.30.9000"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "An exploitable signed comparison vulnerability exists in the ARMv7 memcpy() implementation of GNU glibc 2.30.9000. Calling memcpy() (on ARMv7 targets that utilize the GNU glibc implementation) with a negative value for the \u0027num\u0027 parameter results in a signed comparison vulnerability. If an attacker underflows the \u0027num\u0027 parameter to memcpy(), this vulnerability could lead to undefined behavior such as writing to out-of-bounds memory and potentially remote code execution. Furthermore, this memcpy() implementation allows for program execution to continue in scenarios where a segmentation fault or crash should have occurred. The dangers occur in that subsequent execution and iterations of this code will be executed with this corrupted data."
        }
      ],
      "metrics": [
        {
          "cvssV3_0": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 8.1,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.0"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-195",
              "description": "CWE-195: Signed to Unsigned Conversion Error",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2022-10-17T00:00:00.000Z",
        "orgId": "b86d76f8-0f8a-4a96-a78d-d8abfc7fc29b",
        "shortName": "talos"
      },
      "references": [
        {
          "name": "FEDORA-2020-d860479b2a",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/URXOIA2LDUKHQXK4BE55BQBRI6ZZG3Y6/"
        },
        {
          "name": "FEDORA-2020-4e92a61688",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SPYXTDOOB4PQGTYAMZAZNJIB3FF6YQXI/"
        },
        {
          "name": "GLSA-202101-20",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://security.gentoo.org/glsa/202101-20"
        },
        {
          "name": "[mina-dev] 20210225 [jira] [Created] (FTPSERVER-500) Security vulnerability in common/lib/log4j-1.2.17.jar",
          "tags": [
            "mailing-list"
          ],
          "url": "https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E"
        },
        {
          "url": "https://sourceware.org/bugzilla/show_bug.cgi?id=25620"
        },
        {
          "url": "https://www.talosintelligence.com/vulnerability_reports/TALOS-2020-1019"
        },
        {
          "name": "[debian-lts-announce] 20221017 [SECURITY] [DLA 3152-1] glibc security update",
          "tags": [
            "mailing-list"
          ],
          "url": "https://lists.debian.org/debian-lts-announce/2022/10/msg00021.html"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "b86d76f8-0f8a-4a96-a78d-d8abfc7fc29b",
    "assignerShortName": "talos",
    "cveId": "CVE-2020-6096",
    "datePublished": "2020-04-01T00:00:00.000Z",
    "dateReserved": "2020-01-07T00:00:00.000Z",
    "dateUpdated": "2026-10-14T08:06:59.641Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

USN-4954-1 (UBUNTU-CVE-2009-5155)

Vulnerability from osv_ubuntu – Published: 2021-05-14 00:19 – Updated: 2026-04-27 14:11 – Source website

Summary

glibc vulnerabilities

Details

Jason Royes and Samuel Dytrych discovered that the memcpy() implementation for 32 bit ARM processors in the GNU C Library contained an integer underflow vulnerability. An attacker could possibly use this to cause a denial of service (application crash) or execute arbitrary code. (CVE-2020-6096)

It was discovered that the POSIX regex implementation in the GNU C Library did not properly parse alternatives. An attacker could use this to cause a denial of service. (CVE-2009-5155)

References

URL

Type

	https://ubuntu.com/security/notices/USN-4954-1	ADVISORY
	https://ubuntu.com/security/CVE-2009-5155	REPORT
	https://ubuntu.com/security/CVE-2020-6096	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2009-5155",
              "severity": [
                {
                  "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "negligible",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2020-6096",
              "severity": [
                {
                  "score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:16.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "glibc-source",
            "binary_version": "2.23-0ubuntu11.3"
          },
          {
            "binary_name": "libc-bin",
            "binary_version": "2.23-0ubuntu11.3"
          },
          {
            "binary_name": "libc-dev-bin",
            "binary_version": "2.23-0ubuntu11.3"
          },
          {
            "binary_name": "libc6",
            "binary_version": "2.23-0ubuntu11.3"
          },
          {
            "binary_name": "libc6-amd64",
            "binary_version": "2.23-0ubuntu11.3"
          },
          {
            "binary_name": "libc6-armel",
            "binary_version": "2.23-0ubuntu11.3"
          },
          {
            "binary_name": "libc6-dev-amd64",
            "binary_version": "2.23-0ubuntu11.3"
          },
          {
            "binary_name": "libc6-dev-armel",
            "binary_version": "2.23-0ubuntu11.3"
          },
          {
            "binary_name": "libc6-dev-i386",
            "binary_version": "2.23-0ubuntu11.3"
          },
          {
            "binary_name": "libc6-dev-ppc64",
            "binary_version": "2.23-0ubuntu11.3"
          },
          {
            "binary_name": "libc6-dev-s390",
            "binary_version": "2.23-0ubuntu11.3"
          },
          {
            "binary_name": "libc6-dev-x32",
            "binary_version": "2.23-0ubuntu11.3"
          },
          {
            "binary_name": "libc6-i386",
            "binary_version": "2.23-0ubuntu11.3"
          },
          {
            "binary_name": "libc6-pic",
            "binary_version": "2.23-0ubuntu11.3"
          },
          {
            "binary_name": "libc6-ppc64",
            "binary_version": "2.23-0ubuntu11.3"
          },
          {
            "binary_name": "libc6-s390",
            "binary_version": "2.23-0ubuntu11.3"
          },
          {
            "binary_name": "libc6-x32",
            "binary_version": "2.23-0ubuntu11.3"
          },
          {
            "binary_name": "locales",
            "binary_version": "2.23-0ubuntu11.3"
          },
          {
            "binary_name": "locales-all",
            "binary_version": "2.23-0ubuntu11.3"
          },
          {
            "binary_name": "multiarch-support",
            "binary_version": "2.23-0ubuntu11.3"
          },
          {
            "binary_name": "nscd",
            "binary_version": "2.23-0ubuntu11.3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "glibc",
        "purl": "pkg:deb/ubuntu/glibc@2.23-0ubuntu11.3?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.23-0ubuntu11.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.21-0ubuntu4",
        "2.21-0ubuntu5",
        "2.21-0ubuntu6",
        "2.23-0ubuntu1",
        "2.23-0ubuntu2",
        "2.23-0ubuntu3",
        "2.23-0ubuntu4",
        "2.23-0ubuntu5",
        "2.23-0ubuntu6",
        "2.23-0ubuntu7",
        "2.23-0ubuntu9",
        "2.23-0ubuntu10",
        "2.23-0ubuntu11",
        "2.23-0ubuntu11.2"
      ]
    }
  ],
  "aliases": [],
  "details": "Jason Royes and Samuel Dytrych discovered that the memcpy()\nimplementation for 32 bit ARM processors in the GNU C Library contained\nan integer underflow vulnerability. An attacker could possibly use\nthis to cause a denial of service (application crash) or execute\narbitrary code. (CVE-2020-6096)\n\nIt was discovered that the POSIX regex implementation in the GNU C\nLibrary did not properly parse alternatives. An attacker could use this\nto cause a denial of service. (CVE-2009-5155)\n",
  "id": "USN-4954-1",
  "modified": "2026-04-27T14:11:27Z",
  "published": "2021-05-14T00:19:34Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-4954-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2009-5155"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-6096"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "glibc vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2009-5155",
    "UBUNTU-CVE-2020-6096"
  ]
}

USN-5310-1 (UBUNTU-CVE-2016-10228)

Vulnerability from osv_ubuntu – Published: 2022-03-01 15:09 – Updated: 2026-04-27 14:11 – Source website

Summary

glibc vulnerabilities

Details

Jan Engelhardt, Tavis Ormandy, and others discovered that the GNU C Library iconv feature incorrectly handled certain input sequences. An attacker could possibly use this issue to cause the GNU C Library to hang or crash, resulting in a denial of service. This issue only affected Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. (CVE-2016-10228, CVE-2019-25013, CVE-2020-27618, CVE-2020-29562, CVE-2021-3326)

Jason Royes and Samuel Dytrych discovered that the GNU C Library incorrectly handled signed comparisons on ARMv7 targets. A remote attacker could use this issue to cause the GNU C Library to crash, resulting in a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. (CVE-2020-6096)

It was discovered that the GNU C Library nscd daemon incorrectly handled certain netgroup lookups. An attacker could possibly use this issue to cause the GNU C Library to crash, resulting in a denial of service. This issue only affected Ubuntu 20.04 LTS. (CVE-2021-27645)

It was discovered that the GNU C Library wordexp function incorrectly handled certain patterns. An attacker could use this issue to cause the GNU C Library to crash, resulting in a denial of service, or possibly obtain sensitive information. This issue only affected Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. (CVE-2021-35942)

It was discovered that the GNU C Library realpath function incorrectly handled return values. An attacker could possibly use this issue to obtain sensitive information. This issue only affected Ubuntu 21.10. (CVE-2021-3998)

It was discovered that the GNU C library getcwd function incorrectly handled buffers. An attacker could use this issue to cause the GNU C Library to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2021-3999)

It was discovered that the GNU C Library sunrpc module incorrectly handled buffer lengths. An attacker could possibly use this issue to cause the GNU C Library to crash, resulting in a denial of service. (CVE-2022-23218, CVE-2022-23219)

References

URL

Type

	https://ubuntu.com/security/notices/USN-5310-1	ADVISORY
	https://ubuntu.com/security/CVE-2016-10228	REPORT
	https://ubuntu.com/security/CVE-2019-25013	REPORT
	https://ubuntu.com/security/CVE-2020-6096	REPORT
	https://ubuntu.com/security/CVE-2020-27618	REPORT
	https://ubuntu.com/security/CVE-2020-29562	REPORT
	https://ubuntu.com/security/CVE-2021-3326	REPORT
	https://ubuntu.com/security/CVE-2021-3998	REPORT
	https://ubuntu.com/security/CVE-2021-3999	REPORT
	https://ubuntu.com/security/CVE-2021-27645	REPORT
	https://ubuntu.com/security/CVE-2021-35942	REPORT
	https://ubuntu.com/security/CVE-2022-23218	REPORT
	https://ubuntu.com/security/CVE-2022-23219	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2016-10228",
              "severity": [
                {
                  "score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "negligible",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2019-25013",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2020-6096",
              "severity": [
                {
                  "score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2020-27618",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2020-29562",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-3326",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-3999",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-35942",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2022-23218",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2022-23219",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:18.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "glibc-source",
            "binary_version": "2.27-3ubuntu1.5"
          },
          {
            "binary_name": "libc-bin",
            "binary_version": "2.27-3ubuntu1.5"
          },
          {
            "binary_name": "libc-dev-bin",
            "binary_version": "2.27-3ubuntu1.5"
          },
          {
            "binary_name": "libc6",
            "binary_version": "2.27-3ubuntu1.5"
          },
          {
            "binary_name": "libc6-amd64",
            "binary_version": "2.27-3ubuntu1.5"
          },
          {
            "binary_name": "libc6-armel",
            "binary_version": "2.27-3ubuntu1.5"
          },
          {
            "binary_name": "libc6-dev-amd64",
            "binary_version": "2.27-3ubuntu1.5"
          },
          {
            "binary_name": "libc6-dev-armel",
            "binary_version": "2.27-3ubuntu1.5"
          },
          {
            "binary_name": "libc6-dev-i386",
            "binary_version": "2.27-3ubuntu1.5"
          },
          {
            "binary_name": "libc6-dev-s390",
            "binary_version": "2.27-3ubuntu1.5"
          },
          {
            "binary_name": "libc6-dev-x32",
            "binary_version": "2.27-3ubuntu1.5"
          },
          {
            "binary_name": "libc6-i386",
            "binary_version": "2.27-3ubuntu1.5"
          },
          {
            "binary_name": "libc6-lse",
            "binary_version": "2.27-3ubuntu1.5"
          },
          {
            "binary_name": "libc6-pic",
            "binary_version": "2.27-3ubuntu1.5"
          },
          {
            "binary_name": "libc6-s390",
            "binary_version": "2.27-3ubuntu1.5"
          },
          {
            "binary_name": "libc6-x32",
            "binary_version": "2.27-3ubuntu1.5"
          },
          {
            "binary_name": "locales",
            "binary_version": "2.27-3ubuntu1.5"
          },
          {
            "binary_name": "locales-all",
            "binary_version": "2.27-3ubuntu1.5"
          },
          {
            "binary_name": "multiarch-support",
            "binary_version": "2.27-3ubuntu1.5"
          },
          {
            "binary_name": "nscd",
            "binary_version": "2.27-3ubuntu1.5"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "glibc",
        "purl": "pkg:deb/ubuntu/glibc@2.27-3ubuntu1.5?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.27-3ubuntu1.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.26-0ubuntu2",
        "2.26-0ubuntu2.1",
        "2.27-0ubuntu2",
        "2.27-0ubuntu3",
        "2.27-3ubuntu1",
        "2.27-3ubuntu1.2",
        "2.27-3ubuntu1.3",
        "2.27-3ubuntu1.4"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2016-10228",
              "severity": [
                {
                  "score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "negligible",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2019-25013",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2020-6096",
              "severity": [
                {
                  "score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2020-27618",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2020-29562",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-3326",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-3999",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-27645",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2021-35942",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2022-23218",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2022-23219",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:20.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "glibc-source",
            "binary_version": "2.31-0ubuntu9.7"
          },
          {
            "binary_name": "libc-bin",
            "binary_version": "2.31-0ubuntu9.7"
          },
          {
            "binary_name": "libc-dev-bin",
            "binary_version": "2.31-0ubuntu9.7"
          },
          {
            "binary_name": "libc6",
            "binary_version": "2.31-0ubuntu9.7"
          },
          {
            "binary_name": "libc6-amd64",
            "binary_version": "2.31-0ubuntu9.7"
          },
          {
            "binary_name": "libc6-armel",
            "binary_version": "2.31-0ubuntu9.7"
          },
          {
            "binary_name": "libc6-dev-amd64",
            "binary_version": "2.31-0ubuntu9.7"
          },
          {
            "binary_name": "libc6-dev-armel",
            "binary_version": "2.31-0ubuntu9.7"
          },
          {
            "binary_name": "libc6-dev-i386",
            "binary_version": "2.31-0ubuntu9.7"
          },
          {
            "binary_name": "libc6-dev-s390",
            "binary_version": "2.31-0ubuntu9.7"
          },
          {
            "binary_name": "libc6-dev-x32",
            "binary_version": "2.31-0ubuntu9.7"
          },
          {
            "binary_name": "libc6-i386",
            "binary_version": "2.31-0ubuntu9.7"
          },
          {
            "binary_name": "libc6-lse",
            "binary_version": "2.31-0ubuntu9.7"
          },
          {
            "binary_name": "libc6-pic",
            "binary_version": "2.31-0ubuntu9.7"
          },
          {
            "binary_name": "libc6-prof",
            "binary_version": "2.31-0ubuntu9.7"
          },
          {
            "binary_name": "libc6-s390",
            "binary_version": "2.31-0ubuntu9.7"
          },
          {
            "binary_name": "libc6-x32",
            "binary_version": "2.31-0ubuntu9.7"
          },
          {
            "binary_name": "locales",
            "binary_version": "2.31-0ubuntu9.7"
          },
          {
            "binary_name": "locales-all",
            "binary_version": "2.31-0ubuntu9.7"
          },
          {
            "binary_name": "nscd",
            "binary_version": "2.31-0ubuntu9.7"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "glibc",
        "purl": "pkg:deb/ubuntu/glibc@2.31-0ubuntu9.7?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.31-0ubuntu9.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.30-0ubuntu2",
        "2.30-0ubuntu3",
        "2.31-0ubuntu5",
        "2.31-0ubuntu6",
        "2.31-0ubuntu7",
        "2.31-0ubuntu9",
        "2.31-0ubuntu9.1",
        "2.31-0ubuntu9.2",
        "2.31-0ubuntu9.3"
      ]
    }
  ],
  "aliases": [],
  "details": "Jan Engelhardt, Tavis Ormandy, and others discovered that the GNU C Library\niconv feature incorrectly handled certain input sequences. An attacker\ncould possibly use this issue to cause the GNU C Library to hang or crash,\nresulting in a denial of service. This issue only affected Ubuntu 18.04 LTS\nand Ubuntu 20.04 LTS. (CVE-2016-10228, CVE-2019-25013, CVE-2020-27618,\nCVE-2020-29562, CVE-2021-3326)\n\nJason Royes and Samuel Dytrych discovered that the GNU C Library\nincorrectly handled signed comparisons on ARMv7 targets. A remote attacker\ncould use this issue to cause the GNU C Library to crash, resulting in a\ndenial of service, or possibly execute arbitrary code. This issue only\naffected Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. (CVE-2020-6096)\n\nIt was discovered that the GNU C Library nscd daemon incorrectly handled\ncertain netgroup lookups. An attacker could possibly use this issue to\ncause the GNU C Library to crash, resulting in a denial of service. This\nissue only affected Ubuntu 20.04 LTS. (CVE-2021-27645)\n\nIt was discovered that the GNU C Library wordexp function incorrectly\nhandled certain patterns. An attacker could use this issue to cause the\nGNU C Library to crash, resulting in a denial of service, or possibly\nobtain sensitive information. This issue only affected Ubuntu 18.04 LTS and\nUbuntu 20.04 LTS. (CVE-2021-35942)\n\nIt was discovered that the GNU C Library realpath function incorrectly\nhandled return values. An attacker could possibly use this issue to obtain\nsensitive information. This issue only affected Ubuntu 21.10.\n(CVE-2021-3998)\n\nIt was discovered that the GNU C library getcwd function incorrectly\nhandled buffers. An attacker could use this issue to cause the GNU C\nLibrary to crash, resulting in a denial of service, or possibly execute\narbitrary code. (CVE-2021-3999)\n\nIt was discovered that the GNU C Library sunrpc module incorrectly handled\nbuffer lengths. An attacker could possibly use this issue to cause the GNU\nC Library to crash, resulting in a denial of service. (CVE-2022-23218,\nCVE-2022-23219)\n",
  "id": "USN-5310-1",
  "modified": "2026-04-27T14:11:27Z",
  "published": "2022-03-01T15:09:40Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-5310-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2016-10228"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2019-25013"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-6096"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-27618"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-29562"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-3326"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-3998"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-3999"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-27645"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-35942"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2022-23218"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2022-23219"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "glibc vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2016-10228",
    "UBUNTU-CVE-2019-25013",
    "UBUNTU-CVE-2020-6096",
    "UBUNTU-CVE-2020-27618",
    "UBUNTU-CVE-2020-29562",
    "UBUNTU-CVE-2021-3326",
    "UBUNTU-CVE-2021-3998",
    "UBUNTU-CVE-2021-3999",
    "UBUNTU-CVE-2021-27645",
    "UBUNTU-CVE-2021-35942",
    "UBUNTU-CVE-2022-23218",
    "UBUNTU-CVE-2022-23219"
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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UBUNTU-CVE-2020-6096 (CVE-2020-6096)

CVE-2020-6096 (GCVE-0-2020-6096)

USN-4954-1 (UBUNTU-CVE-2009-5155)

USN-5310-1 (UBUNTU-CVE-2016-10228)

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Nomenclature

Vulnerability timeline

Related by attack behaviour