CVE-2021-31566

high

Description

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

https://lists.debian.org/debian-lts-announce/2022/11/msg00030.html

https://github.com/libarchive/libarchive/issues/1566

https://github.com/libarchive/libarchive/commit/b41daecb5ccb4c8e3b2c53fd6147109fc12c3043

https://bugzilla.redhat.com/show_bug.cgi?id=2024237

https://access.redhat.com/security/cve/CVE-2021-31566

Details

Source: Mitre, NVD

Published: 2022-08-23

Risk Information

CVSS v2

Base Score: 7.2

Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C

Severity: High

CVSS v3

Base Score: 7.8

Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Severity: High