CVE-2022-39260

 

Published at: - 19-10-2022 02:15

Last modified: - 16-11-2022 07:30

Total changes: - 6

Description

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.

Common Vulnerability Scoring System (CVSS)

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

 

Verification logic

 

Reference

• https://github.com/git/git/security/advisories/GHSA-rjr6-wcq6-83p6
• FEDORA-2022-8b58806840-Mailing List, Third Party Advisory
• https://support.apple.com/kb/HT213496
• FEDORA-2022-53aadd995f-Mailing List, Third Party Advisory
• 20221107 APPLE-SA-2022-11-01-1 Xcode 14.1-Mailing List, Third Party Advisory
• FEDORA-2022-fb088df94c-Mailing List, Third Party Advisory

 

Keywords

NVD

 

CVE-2022-39260

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures