GSD-2023-22742

Vulnerability from gsd - Updated: 2023-12-13 01:20
Details
libgit2 is a cross-platform, linkable library implementation of Git. When using an SSH remote with the optional libssh2 backend, libgit2 does not perform certificate checking by default. Prior versions of libgit2 require the caller to set the `certificate_check` field of libgit2's `git_remote_callbacks` structure - if a certificate check callback is not set, libgit2 does not perform any certificate checking. This means that by default - without configuring a certificate check callback, clients will not perform validation on the server SSH keys and may be subject to a man-in-the-middle attack. Users are encouraged to upgrade to v1.4.5 or v1.5.1. Users unable to upgrade should ensure that all relevant certificates are manually checked.
Aliases
Aliases
CVE-2023-22742
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{
  "GSD": {
    "alias": "CVE-2023-22742",
    "id": "GSD-2023-22742",
    "references": [
      "https://www.suse.com/security/cve/CVE-2023-22742.html"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2023-22742"
      ],
      "details": "libgit2 is a cross-platform, linkable library implementation of Git. When using an SSH remote with the optional libssh2 backend, libgit2 does not perform certificate checking by default. Prior versions of libgit2 require the caller to set the `certificate_check` field of libgit2\u0027s `git_remote_callbacks` structure - if a certificate check callback is not set, libgit2 does not perform any certificate checking. This means that by default - without configuring a certificate check callback, clients will not perform validation on the server SSH keys and may be subject to a man-in-the-middle attack. Users are encouraged to upgrade to v1.4.5 or v1.5.1. Users unable to upgrade should ensure that all relevant certificates are manually checked.",
      "id": "GSD-2023-22742",
      "modified": "2023-12-13T01:20:43.277357Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "security-advisories@github.com",
        "ID": "CVE-2023-22742",
        "STATE": "PUBLIC"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "libgit2",
                    "version": {
                      "version_data": [
                        {
                          "version_affected": "=",
                          "version_value": "\u003c 1.4.5"
                        },
                        {
                          "version_affected": "=",
                          "version_value": "= 1.5.0"
                        }
                      ]
                    }
                  }
                ]
              },
              "vendor_name": "libgit2"
            }
          ]
        }
      },
      "data_format": "MITRE",
      "data_type": "CVE",
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      "description": {
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          {
            "lang": "eng",
            "value": "libgit2 is a cross-platform, linkable library implementation of Git. When using an SSH remote with the optional libssh2 backend, libgit2 does not perform certificate checking by default. Prior versions of libgit2 require the caller to set the `certificate_check` field of libgit2\u0027s `git_remote_callbacks` structure - if a certificate check callback is not set, libgit2 does not perform any certificate checking. This means that by default - without configuring a certificate check callback, clients will not perform validation on the server SSH keys and may be subject to a man-in-the-middle attack. Users are encouraged to upgrade to v1.4.5 or v1.5.1. Users unable to upgrade should ensure that all relevant certificates are manually checked."
          }
        ]
      },
      "impact": {
        "cvss": [
          {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N",
            "version": "3.1"
          }
        ]
      },
      "problemtype": {
        "problemtype_data": [
          {
            "description": [
              {
                "cweId": "CWE-347",
                "lang": "eng",
                "value": "CWE-347: Improper Verification of Cryptographic Signature"
              }
            ]
          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "https://github.com/libgit2/libgit2/security/advisories/GHSA-8643-3wh5-rmjq",
            "refsource": "MISC",
            "url": "https://github.com/libgit2/libgit2/security/advisories/GHSA-8643-3wh5-rmjq"
          },
          {
            "name": "https://github.com/libgit2/libgit2/commit/42e5db98b963ae503229c63e44e06e439df50e56",
            "refsource": "MISC",
            "url": "https://github.com/libgit2/libgit2/commit/42e5db98b963ae503229c63e44e06e439df50e56"
          },
          {
            "name": "https://github.com/libgit2/libgit2/commit/cd6f679af401eda1f172402006ef8265f8bd58ea",
            "refsource": "MISC",
            "url": "https://github.com/libgit2/libgit2/commit/cd6f679af401eda1f172402006ef8265f8bd58ea"
          },
          {
            "name": "https://github.com/libgit2/libgit2/releases/tag/v1.4.5",
            "refsource": "MISC",
            "url": "https://github.com/libgit2/libgit2/releases/tag/v1.4.5"
          },
          {
            "name": "https://github.com/libgit2/libgit2/releases/tag/v1.5.1",
            "refsource": "MISC",
            "url": "https://github.com/libgit2/libgit2/releases/tag/v1.5.1"
          },
          {
            "name": "https://www.libssh2.org",
            "refsource": "MISC",
            "url": "https://www.libssh2.org"
          },
          {
            "name": "http://www.openwall.com/lists/oss-security/2023/11/06/5",
            "refsource": "MISC",
            "url": "http://www.openwall.com/lists/oss-security/2023/11/06/5"
          }
        ]
      },
      "source": {
        "advisory": "GHSA-8643-3wh5-rmjq",
        "discovery": "UNKNOWN"
      }
    },
    "gitlab.com": {
      "advisories": [
        {
          "affected_range": "\u003c1.4.5||=1.5.0",
          "affected_versions": "All versions before 1.4.5, version 1.5.0",
          "cvss_v3": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N",
          "cwe_ids": [
            "CWE-1035",
            "CWE-347",
            "CWE-937"
          ],
          "date": "2023-01-30",
          "description": "libgit2 is a cross-platform, linkable library implementation of Git. When using an SSH remote with the optional libssh2 backend, libgit2 does not perform certificate checking by default. Prior versions of libgit2 require the caller to set the `certificate_check` field of libgit2\u0027s `git_remote_callbacks` structure - if a certificate check callback is not set, libgit2 does not perform any certificate checking. This means that by default - without configuring a certificate check callback, clients will not perform validation on the server SSH keys and may be subject to a man-in-the-middle attack. Users are encouraged to upgrade to v1.4.5 or v1.5.1. Users unable to upgrade should ensure that all relevant certificates are manually checked.",
          "fixed_versions": [],
          "identifier": "CVE-2023-22742",
          "identifiers": [
            "CVE-2023-22742",
            "GHSA-8643-3wh5-rmjq"
          ],
          "not_impacted": "",
          "package_slug": "conan/libgit2",
          "pubdate": "2023-01-20",
          "solution": "Unfortunately, there is no solution available yet.",
          "title": "Improper Verification of Cryptographic Signature",
          "urls": [
            "https://nvd.nist.gov/vuln/detail/CVE-2023-22742",
            "https://github.com/libgit2/libgit2/commit/42e5db98b963ae503229c63e44e06e439df50e56",
            "https://github.com/libgit2/libgit2/releases/tag/v1.5.1",
            "https://github.com/libgit2/libgit2/security/advisories/GHSA-8643-3wh5-rmjq",
            "https://github.com/libgit2/libgit2/commit/cd6f679af401eda1f172402006ef8265f8bd58ea",
            "https://github.com/libgit2/libgit2/releases/tag/v1.4.5",
            "https://www.libssh2.org"
          ],
          "uuid": "3a8113b4-af3a-43c8-b975-6d3fe5f55610"
        },
        {
          "affected_range": "\u003c1.4.5||=1.5.0",
          "affected_versions": "All versions before 1.4.5, version 1.5.0",
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            "CWE-937"
          ],
          "date": "2023-01-30",
          "description": "libgit2 is a cross-platform, linkable library implementation of Git. When using an SSH remote with the optional libssh2 backend, libgit2 does not perform certificate checking by default. Prior versions of libgit2 require the caller to set the `certificate_check` field of libgit2\u0027s `git_remote_callbacks` structure - if a certificate check callback is not set, libgit2 does not perform any certificate checking. This means that by default - without configuring a certificate check callback, clients will not perform validation on the server SSH keys and may be subject to a man-in-the-middle attack. Users are encouraged to upgrade to v1.4.5 or v1.5.1. Users unable to upgrade should ensure that all relevant certificates are manually checked.",
          "fixed_versions": [
            "1.4.5",
            "1.5.0.1"
          ],
          "identifier": "CVE-2023-22742",
          "identifiers": [
            "CVE-2023-22742",
            "GHSA-8643-3wh5-rmjq"
          ],
          "not_impacted": "All versions starting from 1.4.5 before 1.5.0, all versions after 1.5.0",
          "package_slug": "gem/rugged",
          "pubdate": "2023-01-20",
          "solution": "Upgrade to versions 1.4.5, 1.5.0.1 or above.",
          "title": "Improper Verification of Cryptographic Signature",
          "urls": [
            "https://nvd.nist.gov/vuln/detail/CVE-2023-22742",
            "https://github.com/libgit2/libgit2/commit/42e5db98b963ae503229c63e44e06e439df50e56",
            "https://github.com/libgit2/libgit2/releases/tag/v1.5.1",
            "https://github.com/libgit2/libgit2/security/advisories/GHSA-8643-3wh5-rmjq",
            "https://github.com/libgit2/libgit2/commit/cd6f679af401eda1f172402006ef8265f8bd58ea",
            "https://github.com/libgit2/libgit2/releases/tag/v1.4.5",
            "https://www.libssh2.org"
          ],
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        }
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                "cpe_name": [],
                "versionEndExcluding": "1.4.5",
                "vulnerable": true
              },
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                "cpe_name": [],
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              }
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            "operator": "OR"
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        "description": {
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            }
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              "name": "https://github.com/libgit2/libgit2/commit/42e5db98b963ae503229c63e44e06e439df50e56",
              "refsource": "MISC",
              "tags": [
                "Patch",
                "Third Party Advisory"
              ],
              "url": "https://github.com/libgit2/libgit2/commit/42e5db98b963ae503229c63e44e06e439df50e56"
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              ],
              "url": "https://github.com/libgit2/libgit2/security/advisories/GHSA-8643-3wh5-rmjq"
            },
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                "Patch",
                "Third Party Advisory"
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              "url": "https://github.com/libgit2/libgit2/commit/cd6f679af401eda1f172402006ef8265f8bd58ea"
            },
            {
              "name": "https://github.com/libgit2/libgit2/releases/tag/v1.4.5",
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                "Third Party Advisory"
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              "url": "https://github.com/libgit2/libgit2/releases/tag/v1.4.5"
            },
            {
              "name": "https://www.libssh2.org",
              "refsource": "MISC",
              "tags": [
                "Third Party Advisory"
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              "url": "https://www.libssh2.org"
            }
          ]
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      },
      "impact": {
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 5.9,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N",
            "version": "3.1"
          },
          "exploitabilityScore": 2.2,
          "impactScore": 3.6
        }
      },
      "lastModifiedDate": "2023-01-30T20:53Z",
      "publishedDate": "2023-01-20T23:15Z"
    }
  }
}


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  • 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.
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