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NetHack command line -w option parsing is subject to a buffer overflow

Disclosure Date: January 28, 2020 (last updated October 06, 2023)
In NetHack before 3.6.5, an invalid argument to the -w command line option can cause a buffer overflow resulting in a crash or remote code execution/privilege escalation. This vulnerability affects systems that have NetHack installed suid/sgid and shared systems that allow users to influence command line options. Users should upgrade to NetHack 3.6.5.