2021-05-08

[public] 24.7K views, 2.00K likes, 10.0 dislikes audio only

LiveOverflow

Let's investigate some issues we have fuzzing sudo with afl. And also explain how AFL works. After improving our fuzzing setup even more, we are finally read to start fuzzing sudo for real. Can we find the vulnerability now?

https://liveoverflow.com/support/

Grab the files: https://github.com/LiveOverflow/pwnedit/

milek7's blog: https://milek7.pl/howlongsudofuzz/

Sudo Research Episode 02:

00:00 - Recap

00:39 - Fixing AFL Crash Using LLVM mode

03:32 - Testing the AFL Instrumented Sudo Binary

04:11 - How Fuzzing with AFL works!

06:44 - Can AFL find the crash?

08:06 - Detour: busybox and argv[0]

09:48 - How could we discover "sudoedit"?

10:47 - Can AFL find "sudoedit" through magic?

11:25 - Include argv[0] in the testcases

13:06 - Parallel Fuzzing Setup

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