CVE-2021-29468
Arbitrary code execution when checking out an attacker-controlled Git branch
- State
- Published
- Severity
- 8.8 High
- Published
- Apr 29, 2021
- Updated
- Aug 3, 2024
- Reserved
- Mar 30, 2021
Description
Cygwin Git is a patch set for the git command line tool for the cygwin environment. A specially crafted repository that contains symbolic links as well as files with backslash characters in the file name may cause just-checked out code to be executed while checking out a repository using Git on Cygwin. The problem will be patched in the Cygwin Git v2.31.1-2 release. At time of writing, the vulnerability is present in the upstream Git source code; any Cygwin user who compiles Git for themselves from upstream sources should manually apply a patch to mitigate the vulnerability. As mitigation users should not clone or pull from repositories from untrusted sources. CVE-2019-1354 was an equivalent vulnerability in Git for Visual Studio.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 8.8 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H | GitHub_M |
Weaknesses
- CWE-20 Improper Input Validation
Affected Products
| Product | Versions |
|---|---|
Cygwin-Gitme-and |
|
References
- https://github.com/me-and/Cygwin-Git/security/advisories/GHSA-rmp3-wq55-f557
- https://github.com/me-and/Cygwin-Git/blob/main/check-backslash-safety.patch
- https://cygwin.com/pipermail/cygwin-announce/2021-April/010018.html
- https://lore.kernel.org/git/CA+kUOa=juEdBMVr_gyTKjz7PkPt2DZHkXQyzcQmAWCsEHC_ssw%40mail.gmail.com/T/#u
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