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Python code audit of a firmware update - 34C3 CTF software_update (crypto) part 1/2

2018-03-09

[public] 47.9K views, 1.12K likes, 26.0 dislikes audio only

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This challenge from the 34C3 CTF implemented a software update in python. In part 1/2 we try to understand the code and think about possible attacks.

software_update: https://archive.aachen.ccc.de/34c3ctf.ccc.ac/challenges/index.html

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#Cryptography #CTF


upload a software update
/youtube/video/Vgdhlh6evjI?t=97.099998
unpack the zip into a temporary directory
/youtube/video/Vgdhlh6evjI?t=143.84
execute the proof-of-work
/youtube/video/Vgdhlh6evjI?t=275.25
add a debug prints in various places
/youtube/video/Vgdhlh6evjI?t=503.379
add a symlink
/youtube/video/Vgdhlh6evjI?t=516.42999
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