Bug 1781960 (CVE-2019-1351) - CVE-2019-1351 git: Git mistakes some paths for relative paths allowing writing outside of the worktree while cloning
Summary: CVE-2019-1351 git: Git mistakes some paths for relative paths allowing writin...
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2019-1351
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: 1781961
Blocks: 1781145
TreeView+ depends on / blocked
 
Reported: 2019-12-11 00:16 UTC by Pedro Sampaio
Modified: 2021-02-16 20:55 UTC (History)
11 users (show)

Fixed In Version: git 2.24.1, git 2.23.1, git 2.22.2, git 2.21.1, git 2.20.2, git 2.19.3, git 2.18.2, git 2.17.3, git 2.16.6, git 2.15.4, git 2.14.6
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Last Closed: 2019-12-17 18:05:48 UTC

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Description Pedro Sampaio 2019-12-11 00:16:06 UTC 
While the only permitted drive letters for physical drives on Windows are letters of the US-English alphabet, this restriction does not apply to virtual drives assigned via subst <letter>:<path>. Git mistook such paths for relative paths, allowing writing outside of the worktree while cloning.

References:

https://kernel.googlesource.com/pub/scm/git/git/+/refs/tags/v2.24.1/Documentation/RelNotes/2.14.6.txt
Comment 1 Pedro Sampaio 2019-12-11 00:16:51 UTC 
Created git tracking bugs for this issue:

Affects: fedora-all [bug 1781961]
Comment 2 Pavel Cahyna 2019-12-12 09:27:01 UTC 
Does this bug apply to Fedora (or RHEL)? The commit (https://git.kernel.org/pub/scm/git/git.git/commit/?id=f82a97eb9197c1e3768e72648f37ce0ca3233734) explicitly mentions mingw.
Comment 3 Riccardo Schirone 2019-12-13 16:41:15 UTC 
oss-security mailing list reference:
https://www.openwall.com/lists/oss-security/2019/12/13/1
Comment 4 Riccardo Schirone 2019-12-13 16:42:31 UTC 
External References:

https://github.com/git/git/security/advisories/GHSA-39hj-fvvf-mq4f
Comment 5 Riccardo Schirone 2019-12-17 18:00:14 UTC 
Upstream fix:
https://github.com/git/git/commit/f82a97eb9197c1e3768e72648f37ce0ca3233734
Comment 6 Riccardo Schirone 2019-12-17 18:05:51 UTC 
Statement:

This issue did not affect the versions of git as shipped with Red Hat Enterprise Linux 6, 7, and 8 as this is a Windows only issue and it does not affect the Linux versions of git.
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