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american fuzzy lop - a security-oriented fuzzer
https://lcamtuf.coredump.cx/afl/
Apache License 2.0
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AFL beginner - Program 'guff' not found or not executable #114

Closed CK213 closed 3 years ago

CK213 commented 4 years ago

Hi,

I am a beginner of AFL, I have been following the instructions on "Fuzz testing with afl-fuzz" (https://spin.atomicobject.com/2015/08/23/fuzz-testing-american-fuzzy-lop/ ). I have compiled guff and placed it on my Desktop. I was wondering why 'guff' is detected as not found or not executable, and how to fix this? Note that I am running AFL on Ubuntu 16.04.7

The terminal instruction and respond are as follow. ~/Desktop$ afl-fuzz -i AFL/afl/in -o AFL/afl/out guff -x -lyafl-fuzz 1.96b by lcamtuf@google.com [+] You have 8 CPU cores and 1 runnable tasks (utilization: 12%). [+] Try parallel jobs - see /usr/share/doc/afl/parallel_fuzzing.txt. [] Checking core_pattern... [] Checking CPU scaling governor... [] Setting up output directories... [+] Output directory exists but deemed OK to reuse. [] Deleting old session data... [+] Output dir cleanup successful. [] Scanning 'AFL/afl/in'... [+] No auto-generated dictionary tokens to reuse. [] Creating hard links for all input files... [*] Validating target binary...

[-] PROGRAM ABORT : Program 'guff' not found or not executable Location : check_binary(), afl-fuzz.c:6548

Many Thanks.

ianruh commented 4 years ago

Hi @CK213, I'm not sure about this, but my guess is that you need to specify the executable as ./guff if it is just in your desktop directory, and not on your path. Generally, your current directory isn't on your path for security reasons.

CK213 commented 4 years ago

Hi @ianruh, thanks for the fast response, and yea I have tried to specify the executable as ./guff and ~/guff but both execution return the same type of error. PROGRAM ABORT : Program './guff' not found or not executable

CK213 commented 3 years ago

Hi @ianruh, I have figured out my problem. I thought I needed to put the entire guff file inside AFL then run it, but I only have to put the program "guff" in.