The server in Chocolate Doom 3.0.0 and Crispy Doom 5.8.0 doesn’t validate the user-controlled num_players value, leading to a buffer overflow. A malicious user can overwrite the server’s stack.
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-14983
Reference (s):
- https://github.com/chocolate-doom/chocolate-doom/issues/1293
- SUSE:openSUSE-SU-2020:0928
- URL: http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00002.html
- SUSE:openSUSE-SU-2020:0939
- URL: http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00007.html