A buffer overflow in the M_LoadDefaults function in m_misc.c in id Tech 1 (aka Doom engine) allows arbitrary code execution via an unsafe usage of fscanf, because it does not limit the number of characters to be read in a format argument.
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15007
Reference (s):
- https://github.com/AXDOOMER/doom-vanille/commit/8a6d9a02fa991a91ff90ccdc73b5ceabaa6cb9ec
- https://twitter.com/notrevenant/status/1268654123903340544