Bug 2137423 (CVE-2022-39260) - CVE-2022-39260 git: git shell function that splits command arguments can lead to arbitrary heap writes.
Summary: CVE-2022-39260 git: git shell function that splits command arguments can lead...
Keywords:
Status: NEW
Alias: CVE-2022-39260
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2137650 2137651 2137427 2137652
Blocks: 2136007
TreeView+ depends on / blocked
 
Reported: 2022-10-24 20:31 UTC by Zack Miele
Modified: 2022-10-25 18:07 UTC (History)
4 users (show)

Fixed In Version: git 2.30.6, git 2.31.5, git 2.32.4, git 2.33.5, git 2.34.5, git 2.35.5, git 2.36.3, git 2.37.4
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Description Zack Miele 2022-10-24 20:31:52 UTC
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.

https://github.com/git/git/security/advisories/GHSA-rjr6-wcq6-83p6

Comment 1 Zack Miele 2022-10-24 21:18:57 UTC
Created git tracking bugs for this issue:

Affects: fedora-all [bug 2137427]

Comment 2 Todd Zullinger 2022-10-24 22:19:56 UTC
Fixes were pushed to bodhi before this ticket was filed, so it should be closed manually.


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