Link Following The advisory has been revoked - it doesn't affect any version of package libarchive (opens in a new tab)
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-UBUNTU1804-LIBARCHIVE-2326105
- published25 Dec 2021
- disclosed23 Aug 2022
Introduced: 25 Dec 2021
CVE-2021-31566 (opens in a new tab)Amendment
The Ubuntu security team deemed this advisory irrelevant for Ubuntu:18.04.
NVD Description
Note: Versions mentioned in the description apply only to the upstream libarchive package and not the libarchive package as distributed by Ubuntu.
An improper link resolution flaw can occur while extracting an archive leading to changing modes, times, access control lists, and flags of a file outside of the archive. An attacker may provide a malicious archive to a victim user, who would trigger this flaw when trying to extract the archive. A local attacker may use this flaw to gain more privileges in a system.
References
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2021-31566
- https://access.redhat.com/security/cve/CVE-2021-31566
- https://bugzilla.redhat.com/show_bug.cgi?id=2024237
- https://github.com/libarchive/libarchive/commit/b41daecb5ccb4c8e3b2c53fd6147109fc12c3043
- https://github.com/libarchive/libarchive/issues/1566
- https://lists.debian.org/debian-lts-announce/2022/11/msg00030.html