CVE-2026-42497

Description

Archive::Tar versions before 3.08 for Perl extract hardlinks to attacker controlled paths outside the extraction directory. _make_special_file() passes the tar header's linkname to link() without validating it against absolute paths or .. segments, creating a hardlink that shares the victim file's inode. A subsequent write through the extracted name modifies the victim file, and the post-extraction chmod, chown, and utime block in _extract_file() (guarded only against symlinks via -l) applies the tar header's mode, owner, and timestamps to the shared inode during extraction alone.

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Produits concernés

• BINGOS Archive::Tar
• Archive\ \

Scores CVSS

Faiblesses (CWE)

• CWE-59
• CWE-732

Références

• https://github.com/jib/archive-tar-new/commit/17c873492a05eddc0de18c1485e0b2cccd5a9158.patch Patch
• https://metacpan.org/release/BINGOS/Archive-Tar-3.08/changes Release Notes
• https://www.cve.org/CVERecord?id=CVE-2026-42496 Third Party Advisory

Ailleurs

• NVD
• CVE.org
• CIRCL Vulnerability-Lookup
• CERT-FR
• GitHub Advisories