Troubleshooting AFL Fuzzing Problems

2021-05-22

[public] 15.0K views, 1.41K likes, 10.0 dislikes audio only

We are using afl to fuzz the sudo binary, but we run into a lot more issues. In this video we are troubleshooting some issues and come up with solutions.

Article version: https://liveoverflow.com/troubleshooting-afl-fuzzing-problems/

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

Correction: afl can fuzz setuid process, I was just dumb. More details in this video: /youtube/video/TLa2VqcGGEQ

Episode 03:

00:00 - Intro

00:30 - afl: No more free CPU cores

01:10 - Patching execs in target binary

01:47 - afl: Unable to create file. No space left on device

03:06 - afl Trick: Find non-memory corruption issues

04:22 - Fuzzing setuid sudo as root

06:38 - Next fuzz attempt

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