What’s Vulnerable › Vulnerabilities

CVE-2019-9923

• Severity: high (CVSS 7.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-03-22 · updated 2026-10-14
• Weakness: CWE-476

Description

pax_decode_header in sparse.c in GNU Tar before 1.32 had a NULL pointer dereference when parsing certain archives that have malformed extended headers.

Affected products

• GNU Tar: before 1.32 — fixed in 1.32
• openSUSE Leap: 15.0

How to fix

Upgrade to a fixed version: GNU Tar 1.32. Check the vendor advisory for mitigations.

References

• http://git.savannah.gnu.org/cgit/tar.git/commit/?id=cb07844454d8cc9fb21f53ace75975f91185a120
• http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00077.html
• http://savannah.gnu.org/bugs/?55369
• https://bugs.launchpad.net/ubuntu/+source/tar/+bug/1810241
• https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
• https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E
• http://git.savannah.gnu.org/cgit/tar.git/commit/?id=cb07844454d8cc9fb21f53ace75975f91185a120
• http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00077.html
• http://savannah.gnu.org/bugs/?55369
• https://bugs.launchpad.net/ubuntu/+source/tar/+bug/1810241
• https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
• https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E

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