CVE-2021-31566
HIGH severity · CVSS 7.8 · CWE-59
7.8CVSS HIGH
Summary
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.
Impact & exploitability
Attack vectorLocal
Attack complexityLow
Privileges requiredNone
User interactionRequired
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
Exploit probability (EPSS)0%
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Affected products we track (3)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Official patch: https://bugzilla.redhat.com/show_bug.cgi?id=2024237 ↗
Additional information
- NVD record
- https://bugzilla.redhat.com/show_bug.cgi?id=2024237Patch
- https://github.com/libarchive/libarchive/commit/b41daecb5ccb4c8e3b2c53fd6147109fc12c3043Patch
- https://github.com/libarchive/libarchive/issues/1566Patch
- https://access.redhat.com/security/cve/CVE-2021-31566Advisory
- https://lists.debian.org/debian-lts-announce/2022/11/msg00030.htmlAdvisory