CVE-2020-25125 log

Severity Critical
Remote Yes
Type Arbitrary code execution
Importing an OpenPGP key having a preference list for AEAD algorithms will lead to an array overflow and thus often to a crash or other undefined behaviour.

Importing an arbitrary key can often easily be triggered by an attacker and thus triggering this bug. Exploiting the bug aside from crashes is not trivial but likely possible for a dedicated attacker.  The major hurdle for an attacker is that only every second byte is under their control with every first byte having a fixed value of 0x04.

Software distribution verification should not be affected by this bug because such a system uses a curated list of keys.
Group Package Affected Fixed Severity Status Ticket
AVG-1218 gnupg 2.2.21-2 2.2.23-1 Critical Fixed
Date Advisory Group Package Severity Type
07 Sep 2020 ASA-202009-5 AVG-1218 gnupg Critical arbitrary code execution