CVE-2021-23177

An improper link resolution flaw while extracting an archive can lead to
changing the access control list (ACL) of the target of the link. 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 change the ACL of a file on the system and gain more
privileges.

Bugs

• <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1001986&gt;
• <https://github.com/libarchive/libarchive/issues/1565&gt;

Notes