Vulnerability-Lookup

CVE-2021-3580 (GCVE-0-2021-3580)

Vulnerability from cvelistv5 – Published: 2021-08-05 00:00 – Updated: 2026-10-14 09:49

Summary

A flaw was found in the way nettle's RSA decryption functions handled specially crafted ciphertext. An attacker could use this flaw to provide a manipulated ciphertext leading to application crash and denial of service.

Severity

No CVSS data available.

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-11-19 14:22 UTC

CWE

CWE-20

Assigner

redhat CNA under the redhat root

CNA scorecard B 81/100 over 1011 records in the last 180 days details

References

5 references

URL	Tags
https://bugzilla.redhat.com/show_bug.cgi?id=1967983
https://lists.debian.org/debian-lts-announce/2021…	mailing-list
https://security.netapp.com/advisory/ntap-2021110…
https://security.gentoo.org/glsa/202401-24	vendor-advisory
https://cert-portal.siemens.com/productcert/html/…

Impacted products

4 products

Vendor	Product	Version	CPE status
n/a	nettle	Affected: nettle 3.7.3
Siemens	SIMATIC S7-1500 CPU 1518-4 PN/DP MFP	Affected: V3.1.0 , < V3.1.5 (custom)	guessed
Siemens	SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP	Affected: V3.1.0 , < V3.1.5 (custom)	guessed
Siemens	SIPLUS S7-1500 CPU 1518-4 PN/DP MFP	Affected: V3.1.0 , < V3.1.5 (custom)	guessed

Show details on NVD website

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                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2024-11-19T14:22:19.550074Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2024-11-19T14:24:19.666Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "product": "nettle",
              "vendor": "n/a",
              "versions": [
                {
                  "status": "affected",
                  "version": "nettle 3.7.3"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "A flaw was found in the way nettle\u0027s RSA decryption functions handled specially crafted ciphertext. An attacker could use this flaw to provide a manipulated ciphertext leading to application crash and denial of service."
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-20",
                  "description": "CWE-20",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2024-01-16T15:06:19.141Z",
            "orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
            "shortName": "redhat"
          },
          "references": [
            {
              "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1967983"
            },
            {
              "name": "[debian-lts-announce] 20210918 [SECURITY] [DLA 2760-1] nettle security update",
              "tags": [
                "mailing-list"
              ],
              "url": "https://lists.debian.org/debian-lts-announce/2021/09/msg00008.html"
            },
            {
              "url": "https://security.netapp.com/advisory/ntap-20211104-0006/"
            },
            {
              "name": "GLSA-202401-24",
              "tags": [
                "vendor-advisory"
              ],
              "url": "https://security.gentoo.org/glsa/202401-24"
            }
          ]
        }
      },
      "cveMetadata": {
        "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
        "assignerShortName": "redhat",
        "cveId": "CVE-2021-3580",
        "datePublished": "2021-08-05T00:00:00.000Z",
        "dateReserved": "2021-06-04T00:00:00.000Z",
        "dateUpdated": "2026-10-14T09:49:47.666Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}

OESA-2021-1320 (CVE-2021-3580)

Vulnerability from osv_openeuler – Published: 2021-08-20 11:04 – Updated: 2026-08-06 11:04 – Source website

Summary

nettle security update

Details

Nettle is a cryptographic library designed to fit any context in crypto toolkits for object-oriented languages, in applications like LSH or GnuPG, or even in kernel space.

Security Fix(es):

Severity

7.5 (High)


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

References

URL

Type

	https://openeuler.org/en/security/safety-bulletin…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2021-3580	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "nettle-debuginfo-3.6-3.oe1.aarch64.rpm",
          "nettle-devel-3.6-3.oe1.aarch64.rpm",
          "nettle-debugsource-3.6-3.oe1.aarch64.rpm",
          "nettle-3.6-3.oe1.aarch64.rpm"
        ],
        "noarch": [
          "nettle-help-3.6-3.oe1.noarch.rpm"
        ],
        "src": [
          "nettle-3.6-3.oe1.src.rpm"
        ],
        "x86_64": [
          "nettle-debuginfo-3.6-3.oe1.x86_64.rpm",
          "nettle-3.6-3.oe1.x86_64.rpm",
          "nettle-devel-3.6-3.oe1.x86_64.rpm",
          "nettle-debugsource-3.6-3.oe1.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:20.03-LTS-SP1",
        "name": "nettle",
        "purl": "pkg:rpm/openEuler/nettle\u0026distro=openEuler-20.03-LTS-SP1"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.6-3.oe1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "nettle-debuginfo-3.6-3.oe1.aarch64.rpm",
          "nettle-debugsource-3.6-3.oe1.aarch64.rpm",
          "nettle-devel-3.6-3.oe1.aarch64.rpm",
          "nettle-3.6-3.oe1.aarch64.rpm"
        ],
        "noarch": [
          "nettle-help-3.6-3.oe1.noarch.rpm"
        ],
        "src": [
          "nettle-3.6-3.oe1.src.rpm"
        ],
        "x86_64": [
          "nettle-debuginfo-3.6-3.oe1.x86_64.rpm",
          "nettle-debugsource-3.6-3.oe1.x86_64.rpm",
          "nettle-devel-3.6-3.oe1.x86_64.rpm",
          "nettle-3.6-3.oe1.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:20.03-LTS-SP2",
        "name": "nettle",
        "purl": "pkg:rpm/openEuler/nettle\u0026distro=openEuler-20.03-LTS-SP2"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.6-3.oe1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "High"
  },
  "details": "Nettle is a cryptographic library designed to fit any context in crypto toolkits for object-oriented languages, in applications like LSH or GnuPG, or even in kernel space.\r\n\r\nSecurity Fix(es):\r\n\r\nA flaw was found in the way nettle\u0026apos;s RSA decryption functions handled specially crafted ciphertext. An attacker could use this flaw to provide a manipulated ciphertext leading to application crash and denial of service.(CVE-2021-3580)",
  "id": "OESA-2021-1320",
  "modified": "2026-08-06T11:04:33Z",
  "published": "2021-08-20T11:04:33Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2021-1320"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-3580"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "nettle security update",
  "upstream": [
    "CVE-2021-3580"
  ]
}

OPENSUSE-SU-2021:0906-1

Vulnerability from csaf_opensuse - Published: 2021-06-24 09:52 - Updated: 2026-09-20 19:26

Summary

Security update for libnettle

Severity

Important

Scope

1 vulnerability in this advisory, including CVE-2021-3580.

CVE-2021-3580

7.5 (High)


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

Recommended: 11 products

Open the full advisory

OPENSUSE-SU-2021:2143-1

Vulnerability from csaf_opensuse - Published: 2021-07-11 08:40 - Updated: 2026-09-20 19:32

Summary

Security update for libnettle

Severity

Important

Scope

1 vulnerability in this advisory, including CVE-2021-3580.

CVE-2021-3580

7.5 (High)


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

Recommended: 19 products

Open the full advisory

OPENSUSE-SU-2024:10962-1

Vulnerability from csaf_opensuse - Published: 2024-06-15 00:00 - Updated: 2026-09-20 20:08

Summary

libhogweed6-3.7.3-1.2 on GA media

Severity

Moderate

Scope

3 vulnerabilities in this advisory, including CVE-2021-3580.

CVE-2021-3580

7.5 (High)


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

Recommended: 28 products

Open the full advisory

RHSA-2021:4451

Vulnerability from csaf_opensuse - Published: 2021-11-09 18:09 - Updated: 2026-10-14 13:10

Summary

Red Hat Security Advisory: gnutls and nettle security, bug fix, and enhancement update

Severity

Moderate

Scope

3 vulnerabilities in this advisory, including CVE-2021-3580.

CVE-2021-3580

A flaw was found in nettle in the way its RSA decryption functions handle specially crafted ciphertext. This flaw allows an attacker to provide a manipulated ciphertext, leading to an application crash and a denial of service.

7.5 (High)


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

Fixed: 106 products

https://access.redhat.com/errata/RHSA-2021:4451

Open the full advisory

SSA-398330

Vulnerability from csaf_siemens - Published: 2023-12-12 00:00 - Updated: 2026-10-13 00:00

Summary

SSA-398330: Vulnerabilities in the additional GNU/Linux subsystem of the SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP >= V3.1.0 and < V3.1.5

Scope

544 vulnerabilities in this advisory, including CVE-2021-3580.

CVE-2021-3580

7.5 (High)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C

Known affected: 5 products

https://support.industry.siemens.com/cs/ww/en/view/109478459/

Open the full advisory

SUSE-SU-2021:2135-1

Vulnerability from csaf_suse - Published: 2021-06-23 11:39 - Updated: 2026-09-20 14:00

Summary

Security update for libnettle

Severity

Important

Scope

1 vulnerability in this advisory, including CVE-2021-3580.

CVE-2021-3580

7.5 (High)


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

Recommended: 140 products

Open the full advisory

SUSE-SU-2021:2143-1

Vulnerability from csaf_suse - Published: 2021-06-23 14:27 - Updated: 2026-09-20 14:00

Summary

Security update for libnettle

Severity

Important

Scope

1 vulnerability in this advisory, including CVE-2021-3580.

CVE-2021-3580

7.5 (High)


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

Recommended: 422 products

Open the full advisory

UBUNTU-CVE-2021-3580 (CVE-2021-3580)

Vulnerability from osv_ubuntu – Published: 2021-06-10 00:00 – Updated: 2026-04-22 07:39 – Source website

Details

Severity

7.5 (High)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2021-3580	REPORT
	https://ubuntu.com/security/notices/USN-4990-1	ADVISORY
	https://www.cve.org/CVERecord?id=CVE-2021-3580	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libhogweed2",
            "binary_version": "2.7.1-1ubuntu0.2"
          },
          {
            "binary_name": "libnettle4",
            "binary_version": "2.7.1-1ubuntu0.2"
          },
          {
            "binary_name": "nettle-bin",
            "binary_version": "2.7.1-1ubuntu0.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:14.04:LTS",
        "name": "nettle",
        "purl": "pkg:deb/ubuntu/nettle@2.7.1-1ubuntu0.2?arch=source\u0026distro=trusty"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.7.1-1",
        "2.7.1-1ubuntu0.1",
        "2.7.1-1ubuntu0.2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libhogweed4",
            "binary_version": "3.2-1ubuntu0.16.04.2"
          },
          {
            "binary_name": "libnettle6",
            "binary_version": "3.2-1ubuntu0.16.04.2"
          },
          {
            "binary_name": "nettle-bin",
            "binary_version": "3.2-1ubuntu0.16.04.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "nettle",
        "purl": "pkg:deb/ubuntu/nettle@3.2-1ubuntu0.16.04.2?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.1.1-4",
        "3.2-1",
        "3.2-1ubuntu0.16.04.1",
        "3.2-1ubuntu0.16.04.2"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libhogweed4",
            "binary_version": "3.4.1-0ubuntu0.18.04.1"
          },
          {
            "binary_name": "libnettle6",
            "binary_version": "3.4.1-0ubuntu0.18.04.1"
          },
          {
            "binary_name": "nettle-bin",
            "binary_version": "3.4.1-0ubuntu0.18.04.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "nettle",
        "purl": "pkg:deb/ubuntu/nettle@3.4.1-0ubuntu0.18.04.1?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.4.1-0ubuntu0.18.04.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.3-2",
        "3.4-1",
        "3.4-1ubuntu0.1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libhogweed5",
            "binary_version": "3.5.1+really3.5.1-2ubuntu0.2"
          },
          {
            "binary_name": "libnettle7",
            "binary_version": "3.5.1+really3.5.1-2ubuntu0.2"
          },
          {
            "binary_name": "nettle-bin",
            "binary_version": "3.5.1+really3.5.1-2ubuntu0.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "nettle",
        "purl": "pkg:deb/ubuntu/nettle@3.5.1+really3.5.1-2ubuntu0.2?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.5.1+really3.5.1-2ubuntu0.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.4.1-1",
        "3.5.1+really3.5.1-2",
        "3.5.1+really3.5.1-2ubuntu0.1"
      ]
    }
  ],
  "aliases": [],
  "details": "A flaw was found in the way nettle\u0027s RSA decryption functions handled specially crafted ciphertext. An attacker could use this flaw to provide a manipulated ciphertext leading to application crash and denial of service.",
  "id": "UBUNTU-CVE-2021-3580",
  "modified": "2026-04-22T07:39:47Z",
  "published": "2021-06-10T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-3580"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-4990-1"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2021-3580"
    }
  ],
  "related": [
    "USN-4990-1"
  ],
  "schema_version": "1.7.0",
  "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": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2021-3580"
  ]
}

VDE-2022-010

Vulnerability from csaf_phoenixcontactgmbhcokg - Published: 2022-04-12 06:00 - Updated: 2025-05-22 13:03

Summary

PHOENIX CONTACT: Multiple Linux component vulnerabilities fixed in latest AXC F x152 LTS release

Scope

60 vulnerabilities in this advisory, including CVE-2021-3580.

CVE-2021-3580

7.5 (High)


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

Known affected: 4 products Fixed: 4 products

Open the full advisory

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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CVE-2021-3580 (GCVE-0-2021-3580)

OESA-2021-1320 (CVE-2021-3580)

UBUNTU-CVE-2021-3580 (CVE-2021-3580)

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