tar: Memory leak in read_header() in list.c (CVE-2021-20193)

A flaw was found in the src/list.c of tar 1.33 and earlier. This flaw allows an attacker who can submit a crafted input file to tar to cause uncontrolled consumption of memory. The highest threat from this vulnerability is to system availability.

References:

• https://savannah.gnu.org/bugs/?59897
• https://nvd.nist.gov/vuln/detail/CVE-2021-20193

Patch:

https://git.savannah.gnu.org/cgit/tar.git/commit/?id=d9d4435692150fa8ff68e1b1a473d187cc3fd777

Affected branches:

• master (eda7fb6b)
• 3.13-stable
• 3.12-stable
• 3.11-stable
• 3.10-stable