Big Fish: Exploiting a 37-Year-Old Kernel Bug in OpenBSD

Props for the OpenBSD Release -style graphics. Looking forward to the theme song.

Interestingly, looks like this was accidentally fixed in NetBSD during a rewrite of that code in August of 1999.

It’s remarkable that a bug survived 37 years in one of the most heavily audited codebases, which shows how hard some kernel bugs are to catch by review alone. Do you think fuzzing or static analysis could realistically have found this class of bug, or did it need a human thinking about the exploit primitive?

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Poor OpenBSD guys. Now they have to acknowledge THREE exploits (in total) on their homepage.