Vulnerability-Lookup

FKIE_CVE-2020-10769

Vulnerability from fkie_nvd - Published: 2020-06-26 16:15 - Updated: 2026-06-17 02:48

Severity

5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Summary

A buffer over-read flaw was found in RH kernel versions before 5.0 in crypto_authenc_extractkeys in crypto/authenc.c in the IPsec Cryptographic algorithm's module, authenc. When a payload longer than 4 bytes, and is not following 4-byte alignment boundary guidelines, it causes a buffer over-read threat, leading to a system crash. This flaw allows a local attacker with user privileges to cause a denial of service.

References

URL	Tags
secalert@redhat.com	http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00009.html	Mailing List, Third Party Advisory
secalert@redhat.com	https://bugzilla.redhat.com/show_bug.cgi?id=1708775%3B
secalert@redhat.com	https://lkml.org/lkml/2019/1/21/675	Exploit, Mailing List, Patch, Third Party Advisory
secalert@redhat.com	https://www.oracle.com/security-alerts/cpuApr2021.html
af854a3a-2127-422b-91ae-364da2661108	http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00009.html	Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://bugzilla.redhat.com/show_bug.cgi?id=1708775%3B
af854a3a-2127-422b-91ae-364da2661108	https://lkml.org/lkml/2019/1/21/675	Exploit, Mailing List, Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://www.oracle.com/security-alerts/cpuApr2021.html

Impacted products

	Vendor	Product	Version
	redhat	enterprise_linux	7.0
	opensuse	leap	15.1

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "Kernel",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "All kernel versions before 5.0"
            }
          ]
        }
      ],
      "source": "secalert@redhat.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*",
              "matchCriteriaId": "142AD0DD-4CF3-4D74-9442-459CE3347E3A",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    },
    {
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              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A buffer over-read flaw was found in RH kernel versions before 5.0 in crypto_authenc_extractkeys in crypto/authenc.c in the IPsec Cryptographic algorithm\u0027s module, authenc. When a payload longer than 4 bytes, and is not following 4-byte alignment boundary guidelines, it causes a buffer over-read threat, leading to a system crash. This flaw allows a local attacker with user privileges to cause a denial of service."
    },
    {
      "lang": "es",
      "value": "Se encontr\u00f3 un defecto de lectura excesiva del b\u00fafer en el kernel de RH versiones anteriores a 5.0, en la funci\u00f3n crypto_authenc_extractkeys en el archivo crypto/authenc.c en el m\u00f3dulo del algoritmo Criptogr\u00e1fico IPsec, authenc. Cuando una carga \u00fatil de m\u00e1s de 4 bytes y no sigue las pautas de l\u00edmites de alineaci\u00f3n de 4 bytes, esto causa una amenaza de lectura excesiva del b\u00fafer, conllevando a un bloqueo del sistema. Este fallo permite a un atacante local con privilegios de usuario causar una denegaci\u00f3n de servicio"
    }
  ],
  "id": "CVE-2020-10769",
  "lastModified": "2026-06-17T02:48:24.547",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "LOW",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "LOCAL",
          "authentication": "NONE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 2.1,
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "vectorString": "AV:L/AC:L/Au:N/C:N/I:N/A:P",
          "version": "2.0"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2020-06-26T16:15:12.140",
  "references": [
    {
      "source": "secalert@redhat.com",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ],
      "url": "http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00009.html"
    },
    {
      "source": "secalert@redhat.com",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1708775%3B"
    },
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    },
    {
      "source": "secalert@redhat.com",
      "url": "https://www.oracle.com/security-alerts/cpuApr2021.html"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
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        "Third Party Advisory"
      ],
      "url": "http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00009.html"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1708775%3B"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
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        "Mailing List",
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        "Third Party Advisory"
      ],
      "url": "https://lkml.org/lkml/2019/1/21/675"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://www.oracle.com/security-alerts/cpuApr2021.html"
    }
  ],
  "sourceIdentifier": "secalert@redhat.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-125"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2020-10769 (GCVE-0-2020-10769)

Vulnerability from cvelistv5 – Published: 2020-06-26 15:32 – Updated: 2024-08-04 11:14

Summary

Severity

No CVSS data available.

CWE

Improper Restriction of Operations within the Bounds of a Memory Buffer

Assigner

redhat CNA under the redhat root

CNA scorecard B 82/100 over 1129 records in the last 180 days details

References

4 references

URL	Tags
https://bugzilla.redhat.com/show_bug.cgi?id=1708775%3B	x_refsource_MISC
https://lkml.org/lkml/2019/1/21/675	x_refsource_MISC
http://lists.opensuse.org/opensuse-security-annou…	vendor-advisoryx_refsource_SUSE
https://www.oracle.com/security-alerts/cpuApr2021.html	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
n/a	Kernel	Affected: All kernel versions before 5.0

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T11:14:15.536Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
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            "tags": [
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            "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1708775%3B"
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            "tags": [
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              "x_transferred"
            ],
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          },
          {
            "name": "openSUSE-SU-2020:1153",
            "tags": [
              "vendor-advisory",
              "x_refsource_SUSE",
              "x_transferred"
            ],
            "url": "http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00009.html"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://www.oracle.com/security-alerts/cpuApr2021.html"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "Kernel",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "All kernel versions before 5.0"
            }
          ]
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      "descriptions": [
        {
          "lang": "en",
          "value": "A buffer over-read flaw was found in RH kernel versions before 5.0 in crypto_authenc_extractkeys in crypto/authenc.c in the IPsec Cryptographic algorithm\u0027s module, authenc. When a payload longer than 4 bytes, and is not following 4-byte alignment boundary guidelines, it causes a buffer over-read threat, leading to a system crash. This flaw allows a local attacker with user privileges to cause a denial of service."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "Improper Restriction of Operations within the Bounds of a Memory Buffer",
              "lang": "en",
              "type": "text"
            }
          ]
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        "orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
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      },
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          ],
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    "assignerShortName": "redhat",
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    "dateUpdated": "2024-08-04T11:14:15.536Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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

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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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