Out-of-bounds Write Affecting git package, versions <1:2.30.2-1+deb11u1



    Attack Complexity Low
    User Interaction Required
    Confidentiality High
    Integrity High
    Availability High
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8.8 high
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Red Hat
8.8 high
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6.3 medium

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  • Snyk ID SNYK-DEBIAN11-GIT-3051727
  • published 19 Oct 2022
  • disclosed 19 Oct 2022

How to fix?

Upgrade Debian:11 git to version 1:2.30.2-1+deb11u1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream git package and not the git package as distributed by Debian:11. See How to fix? for Debian:11 relevant fixed versions and status.

Git is an open source, scalable, distributed revision control system. git shell is a restricted login shell that can be used to implement Git's push/pull functionality via SSH. In versions prior to 2.30.6, 2.31.5, 2.32.4, 2.33.5, 2.34.5, 2.35.5, 2.36.3, and 2.37.4, the function that splits the command arguments into an array improperly uses an int to represent the number of entries in the array, allowing a malicious actor to intentionally overflow the return value, leading to arbitrary heap writes. Because the resulting array is then passed to execv(), it is possible to leverage this attack to gain remote code execution on a victim machine. Note that a victim must first allow access to git shell as a login shell in order to be vulnerable to this attack. This problem is patched in versions 2.30.6, 2.31.5, 2.32.4, 2.33.5, 2.34.5, 2.35.5, 2.36.3, and 2.37.4 and users are advised to upgrade to the latest version. Disabling git shell access via remote logins is a viable short-term workaround.