Inferred Model-based Fuzzer

SoftSec Lab

Last update: Sep 28, 2022

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Overview

IMF: Inferred Model-based Fuzzer

IMF is a kernel API fuzzer that leverages an automated API model inferrence techinque proposed in our paper at CCS. IMF currently only supports macOS. To see how to configure and run IMF, see the followings.

Setup

Requirements

python2.7
pypy
clang

How to run

Generate hooking library for APIs

$ ./gen-hook [output(hooking code) path]
$ clang  -Wall -dynamiclib -framework IOKit -framework CoreFoundation -arch i386\
         -arch x86_64 hook.c -o hook

Collect logs

$ DYLD_INSERT_LIBRARIES=[hooking library path] [program path] [program args]

Filter logs

$ ./filter-log [log dir] [output dir] [# of output(filtered log)] [# of core]

Infer a model and generate a fuzzer.

$ ./gen-fuzz [filtered logs path] [output(fuzzer code) path] [# of core]

Compile the fuzzer

$ clang -framework IOKit -framework CoreFoundation -arch i386 fuzz.c -o fuzz

Run the fuzzer

$ ./fuzz -f [log path] -s [seed] -b [bitlen] -r [rate] -l [# of max loops]

You may want to run the generated fuzzer within a while loop.

CVEs

CVE-2017-7159

Authors

This research project has been conducted by SoftSec Lab at KAIST.

Citing IMF

To cite our paper (pdf):

@INPROCEEDINGS{han:ccs2017,
    author = {HyungSeok Han and Sang Kil Cha},
    title = {Inferred Model-based Fuzzing},
    booktitle = {Proceedings of the ACM Conference on Computer and Communications Security},
    year = {2017},
    pages = {2345--2358}
}

Acknowledgement

The work was supported by Institute for Information & communications Technology Promotion (IITP) grant funded by the Korea government (MSIT).

Comments

Q for const.py

hi! I have a question for the Header in const.py what does the function below working for? void log_CFTypeRef(FILE *f,CFTypeRef target) will it play a role in the following log-filtering part? i tried to delete it and generated some logs, but got stuck in the ./filter-log step. I have no idea how to fix it. looking for your reply.

opened by Jiadosi 3
hi

you got any idea how to avoid segfaulting on arch64? im' clueless here, what arch did you run this at? with what clang version?

the generated fuzzers segfaults for me... in all sorts of different places

best

opened by ghost 1
Fix string handling in hook
When the value recorded in the API log is '" ' "', ApiFuzz will make an error when executing the evaluate function. Because python recognizes the second single quote as an identifier, but that is actually data.

To prevent ApiFuzz from reporting errors and allow API Log to display value strings better, I escaped all non-alpha and non-digital characters into the form of '\xXX'.

And it works pretty well.

{'name':'location','value': '"\x0f\x18"','size' : 0x80,'cnt':0x1, 'data':[]}
opened by Kiprey 0
clang

hi! what is the version of your clang? i got clang error on step 1. clang: error: linker command failed with exit code 1 (use -v to see invocation) looking for your reply, thanks

opened by Jiadosi 0

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Inferred Model-based Fuzzer

Related tags

Overview

IMF: Inferred Model-based Fuzzer

Setup

Requirements

How to run

CVEs

Authors

Citing IMF

Acknowledgement

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Comments

Q for const.py

hi

Fix string handling in hook

clang

Owner

SoftSec Lab

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