nethack: Privilege escalation/remote code execution/crash in configuration parsing (CVE-2019-19905)

NetHack 3.6.x before 3.6.4 is prone to a buffer overflow vulnerability when reading very long lines from configuration files. This affects systems that have NetHack installed suid/sgid, and shared systems that allow users to upload their own configuration files.

References:

• http://nethack.org/security/index.html
• https://nvd.nist.gov/vuln/detail/CVE-2019-19905

Patches:

• https://github.com/NetHack/NetHack/commit/f4a840a48f4bcf11757b3d859e9d53cc9d5ef226
• https://github.com/NetHack/NetHack/commit/f001de79542b8c38b1f8e6d7eaefbbd28ab94b47

Affected branches:

• master
• 3.11-stable