Notes for some fuzzing research...

Software to be fuzzed:

Easy File Share - FileCopa - Serv-U - Vulnserver - WingFTP - WiseFTP -

Exercise 1 - Fuzzing Vulnserver with Peach3

Running Peach Pit Validation:

peach -t fuzzers\vulnserver_peachpit.xml

Start the Peach Remote Agent(For Instrumentation):

peach -a tcp

Run the Peach fuzzing session:

peach fuzzers\vulnserver_peachpit.xml TestHTER

Results:

• Example Peach Logs - https://github.com/f47h3r/fuzzing_notes/blob/master/results/vulnserver/PeachLogs
• Example of Fuzz test case that is exploitable - https://github.com/f47h3r/fuzzing_notes/blob/master/results/vulnserver/PeachLogs/vulnserver_peachpit.xml_TestHTER_20150302155506/Faults/EXPLOITABLE_0x264d5172_0x00000000/726/action_2_Output_Unknown%20Action%202.txt

Vulnserver Exploit

• Vulnserver HTER Crasher: https://github.com/f47h3r/fuzzing_notes/blob/master/results/vulnserver/exploits/crasher.py

• Vulnserver HTER Exploit: https://github.com/f47h3r/fuzzing_notes/blob/master/results/vulnserver/exploits/vulnserver_exploit_calc.py

Finding a "jmp eax" instruction:

sudo ./msfpescan -j eax ~/Research/fuzzing/results/vulnserver/bin/essfunc.dll

-- Output --

[/fuzzing/results/vulnserver/bin/essfunc.dll]
0x62501084 call eax
0x625011b1 jmp eax
0x625015b1 call eax

TODO

• Write Exploit for Vulnserver
• Setup EFS Server
• Fuzz EFS Server

References

• http://thisisdearmo.blogspot.com/2012/01/stack-based-bof-for-hter-command-in.html