Cryptographic key recovery from Linux memory dumps
- Type
- Paper
- Tags
- cryptography, forensic
- Authors
- Torbjörn Pettersson
- Event
- Chaos Communication Camp 2007
- Indexed on
- Mar 27, 2013
- URL
- http://events.ccc.de/camp/2007/Fahrplan/attachments/1300-Cryptokey_forensics_A.pdf
- File name
- 1300-Cryptokey_forensics_A.pdf
- File size
- 150.0 KB
- MD5
- 9efd4695aebd67ecf54943cabb7c87a3
- SHA1
- 996f1048b78a003fbb812f69653b5c49ed575a51
Cryptoloop and dm-crypt are the two disk encryption solutions provided by the stock Linux kernel. This lecture will describe in detail how to find and reuse cryptoloop and dm-crypt keys from kernel memory. When disk encryption is done right it is virtually impossible to break, but as with any security function it is never stronger than its weakest link. Out of necessity keys needs to be stored in cleartext in memory during usage and can be collected by anyone with access to a memory dump of the system. This presentation will go into the details of how cryptographic keys used by dm-crypt and cryptoloop are stored and used in the Linux 2.6 kernel-series and how they can be recovered and reused.
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