CVE-2021-29468

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.

• CWE-20

• https://cygwin.com/pipermail/cygwin-announce/2021-April/010018.htmlMailing List, Patch, Vendor Advisory
• https://github.com/me-and/Cygwin-Git/blob/main/check-backslash-safety.patchPatch, Third Party Advisory
• https://github.com/me-and/Cygwin-Git/security/advisories/GHSA-rmp3-wq55-f557Patch, Third Party Advisory
• https://lore.kernel.org/git/CA+kUOa=juEdBMVr_gyTKjz7PkPt2DZHkXQyzcQmAWCsEHC_ssw%40mail.gmail.com/T/#u
• https://cygwin.com/pipermail/cygwin-announce/2021-April/010018.htmlMailing List, Patch, Vendor Advisory
• https://github.com/me-and/Cygwin-Git/blob/main/check-backslash-safety.patchPatch, Third Party Advisory
• https://github.com/me-and/Cygwin-Git/security/advisories/GHSA-rmp3-wq55-f557Patch, Third Party Advisory
• https://lore.kernel.org/git/CA+kUOa=juEdBMVr_gyTKjz7PkPt2DZHkXQyzcQmAWCsEHC_ssw%40mail.gmail.com/T/#u

Published

Apr 29, 2021

Last Modified

Jun 17, 2026

Status

Modified