cve-2024-32021
Vulnerability from cvelistv5
Published
2024-05-14 19:15
Modified
2025-02-13 17:52
Severity ?
3.9 (Low) - CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:N/I:L/A:L
Summary
Git is a revision control system. Prior to versions 2.45.1, 2.44.1, 2.43.4, 2.42.2, 2.41.1, 2.40.2, and 2.39.4, when cloning a local source repository that contains symlinks via the filesystem, Git may create hardlinks to arbitrary user-readable files on the same filesystem as the target repository in the `objects/` directory. Cloning a local repository over the filesystem may creating hardlinks to arbitrary user-owned files on the same filesystem in the target Git repository's `objects/` directory. When cloning a repository over the filesystem (without explicitly specifying the `file://` protocol or `--no-local`), the optimizations for local cloning will be used, which include attempting to hard link the object files instead of copying them. While the code includes checks against symbolic links in the source repository, which were added during the fix for CVE-2022-39253, these checks can still be raced because the hard link operation ultimately follows symlinks. If the object on the filesystem appears as a file during the check, and then a symlink during the operation, this will allow the adversary to bypass the check and create hardlinks in the destination objects directory to arbitrary, user-readable files. The problem has been patched in versions 2.45.1, 2.44.1, 2.43.4, 2.42.2, 2.41.1, 2.40.2, and 2.39.4.
References
security-advisories@github.comhttp://www.openwall.com/lists/oss-security/2024/05/14/2
security-advisories@github.comhttps://github.com/git/git/security/advisories/GHSA-mvxm-9j2h-qjx7
security-advisories@github.comhttps://lists.debian.org/debian-lts-announce/2024/06/msg00018.html
security-advisories@github.comhttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/S4CK4IYTXEOBZTEM5K3T6LWOIZ3S44AR/
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2024/05/14/2
af854a3a-2127-422b-91ae-364da2661108https://github.com/git/git/security/advisories/GHSA-mvxm-9j2h-qjx7
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2024/06/msg00018.html
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/S4CK4IYTXEOBZTEM5K3T6LWOIZ3S44AR/
Impacted products
Vendor Product Version
git git Version: = 2.45.0
Version: = 2.44.0
Version: >= 2.43.0, < 2.43.4
Version: >= 2.42.0, < 2.42.2
Version: = 2.41.0
Version: >= 2.40.0, < 2.40.2
Version: < 2.39.4
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Si bien el código incluye verificaciones de enlaces simbólicos en el repositorio de origen, que se agregaron durante la corrección de CVE-2022-39253, estas verificaciones aún se pueden ejecutar porque la operación de enlace físico finalmente sigue enlaces simbólicos. Si el objeto en el sistema de archivos aparece como un archivo durante la verificación, y luego como un enlace simbólico durante la operación, esto permitirá al adversario eludir la verificación y crear vínculos físicos en el directorio de objetos de destino a archivos arbitrarios legibles por el usuario. 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      vulnrichment: {
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Prior to versions 2.45.1, 2.44.1, 2.43.4, 2.42.2, 2.41.1, 2.40.2, and 2.39.4, when cloning a local source repository that contains symlinks via the filesystem, Git may create hardlinks to arbitrary user-readable files on the same filesystem as the target repository in the `objects/` directory. Cloning a local repository over the filesystem may creating hardlinks to arbitrary user-owned files on the same filesystem in the target Git repository's `objects/` directory. When cloning a repository over the filesystem (without explicitly specifying the `file://` protocol or `--no-local`), the optimizations for local cloning\\nwill be used, which include attempting to hard link the object files instead of copying them. While the code includes checks against symbolic links in the source repository, which were added during the fix for CVE-2022-39253, these checks can still be raced because the hard link operation ultimately follows symlinks. If the object on the filesystem appears as a file during the check, and then a symlink during the operation, this will allow the adversary to bypass the check and create hardlinks in the destination objects directory to arbitrary, user-readable files. The problem has been patched in versions 2.45.1, 2.44.1, 2.43.4, 2.42.2, 2.41.1, 2.40.2, and 2.39.4.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-547\", \"description\": \"CWE-547: Use of Hard-coded, Security-relevant Constants\"}]}], \"providerMetadata\": {\"orgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"shortName\": \"GitHub_M\", \"dateUpdated\": \"2024-06-26T10:05:54.295Z\"}}}",
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}


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