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Advisories

rsync < 3.5.0 Symlink Race Condition via --remove-source-files

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severity
medium
date
Affecting

  • rsync <= 3.4.4

CWE
  • CWE-59 Improper Link Resolution Before File Access ('Link Following')
  • CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition
CVSS
5.7
CVSS V4 Vector
CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Credit
fcasal
Description
rsync before 3.5.0 contains a symlink race condition vulnerability in the --remove-source-files feature that allows attackers with symlink creation access to cause arbitrary file deletion. Attackers can atomically substitute a symlink for a source file between transfer completion and the unlink() call, causing rsync to delete the symlink target rather than the intended source file.

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