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Advisories

unearth 0.18.2 Path Traversal via Unnormalized Paths and Symlink Escape

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severity
high
date
Affecting

  • unearth <= 0.18.2, fixed in commit 6c78164

CWE
  • CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CVSS
7.2
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
Credit
YU SUN
Description
unearth through 0.18.2, fixed in commit 6c78164, contains a path traversal vulnerability in the is_within_directory function that fails to normalize paths before validation, allowing ../ sequences to bypass directory containment checks. Attackers can supply malicious tar archives with symlink members or traversal sequences to write files to arbitrary filesystem locations accessible to the process.

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