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Every CTF
2020from public repositories

UMassCTF 2020

10 challenges with 15 published solutions between them. The writeups for this event were found in public repositories and on the authors’ own sites. Each repository link is pinned to the commit it was read from.

Where these writeups live

Reverse engineering5

Work out what a compiled program does without its source, then work backwards from the check to the input that passes it.

Binary exploitation4

Turn a memory-safety bug in a native binary into control of execution. Usually a stack overflow, a format string, or a heap primitive.

Uncategorised1

The upstream scoreboard did not say, so neither do we.

Other 2020 events