#VU61393 UNIX symbolic link following in libarchive - CVE-2021-23177
Published: March 15, 2022
Vulnerability identifier: #VU61393
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2021-23177
CWE-ID: CWE-61
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
libarchive
libarchive
Software vendor:
libarchive
libarchive
Description
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a symlink following issue when extracting files from archive, which can lean to changing ACLs of the target of the link. A local user can create a specially crafted archive, trick the victim into extracting files from it and escalate privileges on the system.
Remediation
Install updates from vendor's website.