CVE-2021-29468
HIGHCygwin Git < 2.31.1-1 - Remote Code Execution via Malicious Repository Symbolic Links
Title source: llmDescription
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.
References (4)
Core 4
Core References
Patch, Third Party Advisory x_refsource_confirm
https://github.com/me-and/Cygwin-Git/security/advisories/GHSA-rmp3-wq55-f557
Patch, Third Party Advisory x_refsource_misc
https://github.com/me-and/Cygwin-Git/blob/main/check-backslash-safety.patch
Mailing List, Patch, Vendor Advisory x_refsource_misc
https://cygwin.com/pipermail/cygwin-announce/2021-April/010018.html
Mailing List x_refsource_misc
https://lore.kernel.org/git/CA+kUOa=juEdBMVr_gyTKjz7PkPt2DZHkXQyzcQmAWCsEHC_ssw%40mail.gmail.com/T/#u
Scores
CVSS v3
8.8
EPSS
0.0124
EPSS Percentile
65.4%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Details
CWE
CWE-20
Status
published
Products (1)
cygwin/git
< 2.31.1-1
Published
Apr 29, 2021
Tracked Since
Feb 18, 2026