An issue was discovered in e6y prboom-plus 2.5.1.5. There is a buffer overflow in client and server code responsible for handling received UDP packets, as demonstrated by I_SendPacket or I_SendPacketTo in i_network.c.
lists.opensuse.org/opensuse-security-announce/2020-06/msg00027.html
lists.opensuse.org/opensuse-security-announce/2020-06/msg00028.html
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/77J22ZEQXS5SAYZGBDJ475AKFFJNKX5L/
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/P3WS7GRZUIHCGLFET33MGC3PEKCH37W6/
logicaltrust.net/blog/2019/10/prboom1.html
sourceforge.net/p/prboom-plus/bugs/252/
sourceforge.net/p/prboom-plus/bugs/253/