22C3 - 2.2
22nd Chaos Communication Congress
Private Investigations
| Speakers | |
|---|---|
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Martin Vuagnoux |
| Schedule | |
|---|---|
| Day | 2 |
| Room | Saal 3 |
| Start time | 22:00 |
| Duration | 01:00 |
| Info | |
| ID | 606 |
| Event type | Lecture |
| Track | Hacking |
| Language | English |
| Feedback | |
|---|---|
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Autodafé: An Act of Software Torture
Presentation of an innovative buffer overflow uncovering technique called "Fuzzing by weighting attacks with markers"
Automated vulnerability searching tools have led to a dramatic increase of the rate at which such flaws are discovered. One particular searching technique is fault injection – i.e. insertion of random data into input files, buffers or protocol packets, combined with a systematic monitoring of memory violations. Even if these tools allow to uncover a lot of vulnerabilities, they are still very primitive; despite their poor efficiency, they are useful because of the very high density of such vulnerabilities in modern software.
This paper presents an innovative buffer overflow uncovering technique, which uses a more thorough and reliable approach. This technique, called "fuzzing by weighting attacks with markers", is a specialized kind of fault injection, which does not need source code or special compilation for the monitored program. As a proof of concept of the efficiency of this technique, a tool called Autodafé has been developed. It allows to detect automatically an impressive number of buffer overflow vulnerabilities.