It should be noted that we only tested Ptrix on bare metal machine running Ubuntu 14.04.5 with Linux kernel 4.4.0.
PTrix is carefully designed to take full advantage of hardware feature - Intel Processor Trace as its underpinning tracing component. With PTrix, we demonstrate newly available hardware feature can significantly accelerate binary-only fuzzing through two elaborate designs, including a parallel scheme of trace parsing and a newly designed PT-friendly feedback.
Please refer to docs/INSTALL.md
Our paper can be found in the Ptrix - AsiaCCS 2019.
@inproceedings{yaohui2019,
author = {Chen, Yaohui and Mu, Dongliang and Xu, Jun and Sun, Zhichuang and Shen, Wenbo and Xing, Xinyu and Lu, Long and Mao, Bing},
title = {Ptrix: Efficient Hardware-Assisted Fuzzing for COTS Binary},
booktitle = {Proceedings of the 2019 on Asia Conference on Computer and Communications Security},
series = {ASIACCS '19},
year = {2019},
publisher = {ACM},
}
| CVE ID | Vulnerability Type | Vulnerable Software |
|---|---|---|
| CVE-2018-8816 | Stack Exhaustion | perl-5.26.1 |
| CVE-2018-8881 | Heap buffer overflow | nasm-2.13.02rc2 |
| CVE-2018-8882 | Stack buffer overflow | nasm-2.13.02rc2 |
| CVE-2018-8883 | Global buffer overflow | nasm-2.13.02rc2 |
| CVE-2018-10016 | Division-by-zero | nasm-2.14rc0 |
| CVE-2018-9138 | Stack Exhaustion | binutils-2.29 |
| CVE-2018-9996 | Stack Exhaustion | binutils-2.29 |
| CVE-2018-10316 | Denial-of-Service | nasm-2.14rc0 |
| CVE-2018-9251 | Denial-of-Service | libxml2-2.9.8 |
PTrix uses a series of optimization techniques to exploit intel PT for maximum fuzzing efficiencies, including:
On the PT module side,
- Direct feedback translation
- Parallel packet decoding
On the AFL side,
- Switch feedback scheme from counted edge to slice to improve path sensitivity
- Use a bit instead of a byte of memory to record each slice to improve cache locality
Additionally, PTrix supports fork-server mode and multiplexes PT buffer for different fuzzing instances. There are some small catches please refer to docs/FAQ.md
Please refer to docs/CONTRIBUTING.md
- Automatically patch the target binary if fuzz in PT mode (maybe create a copy and fuzz the copy instead).
- Change power scheduling function of AFL to deprioritize seeds that triggered crashes (avoid traping into local region).
- Gracely handle PMU interrupts.
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