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CVE-2024-32021

CVE-2024-32021 · Local Git clone may hardlink arbitrary user-readable files into the new repository's "objects/" directory

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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.

CVSS 3.9 · Niedrig · EPSS 1,0% · Korrektur verfügbar

Veröffentlicht
Aktualisiert

Technologie-Stack: system

Betroffene Produkte und Versionen

  • git

    Softwareversionen
    • = 2.45.0: Betroffen
    • = 2.44.0: Betroffen
    • >= 2.43.0, < 2.43.4: Betroffen
    • >= 2.42.0, < 2.42.2: Betroffen
    • = 2.41.0: Betroffen
    • >= 2.40.0, < 2.40.2: Betroffen
    • < 2.39.4: Betroffen

    Keine Korrektur veröffentlicht

  • git Debian:12

    Softwareversionen
    • 1:2.39.2+next.20230215-1
    • 1:2.39.2-1.1
    Betroffene Versionsbereiche
    • ECOSYSTEM: < 1:2.39.5-0+deb12u1

    Auf 1:2.39.5-0+deb12u1 aktualisieren

  • git Debian:13

    Betroffene Versionsbereiche
    • ECOSYSTEM: < 1:2.45.1-1

    Auf 1:2.45.1-1 aktualisieren

  • git Debian:14

    Betroffene Versionsbereiche
    • ECOSYSTEM: < 1:2.45.1-1

    Auf 1:2.45.1-1 aktualisieren

  • git Ubuntu:Pro:18.04:LTS

    Softwareversionen
    • 1:2.14.1-1ubuntu4
    • 1:2.15.1-1ubuntu2
    • 1:2.17.0-1ubuntu1
    • 1:2.17.1-1ubuntu0.1
    • 1:2.17.1-1ubuntu0.3
    • 1:2.17.1-1ubuntu0.4
    • 1:2.17.1-1ubuntu0.5
    • 1:2.17.1-1ubuntu0.6
    • 1:2.17.1-1ubuntu0.7
    • 1:2.17.1-1ubuntu0.8
    • 1:2.17.1-1ubuntu0.9
    • 1:2.17.1-1ubuntu0.10
    • 1:2.17.1-1ubuntu0.11
    • 1:2.17.1-1ubuntu0.12
    • 1:2.17.1-1ubuntu0.13
    • 1:2.17.1-1ubuntu0.14
    • 1:2.17.1-1ubuntu0.15
    • 1:2.17.1-1ubuntu0.16
    • 1:2.17.1-1ubuntu0.17
    • 1:2.17.1-1ubuntu0.18
    Betroffene Versionsbereiche
    • ECOSYSTEM: < 1:2.17.1-1ubuntu0.18+esm1

    Auf 1:2.17.1-1ubuntu0.18+esm1 aktualisieren

  • git Ubuntu:20.04:LTS

    Softwareversionen
    • 1:2.20.1-2ubuntu1
    • 1:2.24.0-1ubuntu1
    • 1:2.24.0-1ubuntu2
    • 1:2.25.0-1ubuntu1
    • 1:2.25.1-1ubuntu1
    • 1:2.25.1-1ubuntu2
    • 1:2.25.1-1ubuntu3
    • 1:2.25.1-1ubuntu3.1
    • 1:2.25.1-1ubuntu3.2
    • 1:2.25.1-1ubuntu3.3
    • 1:2.25.1-1ubuntu3.4
    • 1:2.25.1-1ubuntu3.5
    • 1:2.25.1-1ubuntu3.6
    • 1:2.25.1-1ubuntu3.7
    • 1:2.25.1-1ubuntu3.8
    • 1:2.25.1-1ubuntu3.10
    • 1:2.25.1-1ubuntu3.11
    Betroffene Versionsbereiche
    • ECOSYSTEM: < 1:2.25.1-1ubuntu3.12

    Auf 1:2.25.1-1ubuntu3.12 aktualisieren

  • git Ubuntu:22.04:LTS

    Softwareversionen
    • 1:2.32.0-1ubuntu1
    • 1:2.33.1-1ubuntu1
    • 1:2.34.1-1ubuntu1
    • 1:2.34.1-1ubuntu1.1
    • 1:2.34.1-1ubuntu1.2
    • 1:2.34.1-1ubuntu1.4
    • 1:2.34.1-1ubuntu1.5
    • 1:2.34.1-1ubuntu1.6
    • 1:2.34.1-1ubuntu1.8
    • 1:2.34.1-1ubuntu1.9
    • 1:2.34.1-1ubuntu1.10
    Betroffene Versionsbereiche
    • ECOSYSTEM: < 1:2.34.1-1ubuntu1.11

    Auf 1:2.34.1-1ubuntu1.11 aktualisieren

  • git Ubuntu:24.04:LTS

    Softwareversionen
    • 1:2.40.1-1ubuntu1
    • 1:2.43.0-1ubuntu1
    • 1:2.43.0-1ubuntu5
    • 1:2.43.0-1ubuntu6
    • 1:2.43.0-1ubuntu7
    Betroffene Versionsbereiche
    • ECOSYSTEM: < 1:2.43.0-1ubuntu7.1

    Auf 1:2.43.0-1ubuntu7.1 aktualisieren

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