NULL Pointer Dereference Affecting tar package, versions <1.32+dfsg-1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-ECHOLATEST-TAR-18516595
- published4 Aug 2026
- disclosed22 Mar 2019
Introduced: 22 Mar 2019
CVE-2019-9923 (opens in a new tab)How to fix?
Upgrade Echo:latest tar to version 1.32+dfsg-1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream tar package and not the tar package as distributed by Echo.
See How to fix? for Echo:latest relevant fixed versions and status.
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.
References
- https://advisory.echohq.com/cve/CVE-2019-9923
- https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b@%3Cissues.bookkeeper.apache.org%3E
- https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4@%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
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html