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Advisories

Dulwich 0.24.0 before 1.2.8 Symlink Write-Through via porcelain.checkout paths

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Severity
high
Date
Affecting

  • dulwich >= 0.24.0, < 1.2.8

CWE
  • CWE-59 Improper Link Resolution Before File Access ('Link Following')
CVSS
7.3
CVSS V4 Vector
CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Credit
manus-use, jelmer
Description
Dulwich from 0.24.0 before 1.2.8 contains a symlink following vulnerability in porcelain.checkout(paths=[...]) that allows attackers to write arbitrary files by abusing raw os.open without O_NOFOLLOW. Attackers can craft a repository where a worktree symlink points to .git/hooks/post-checkout, so restoring the file from a tag writes a malicious hook for code execution.

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