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Bug 94188 - Kernel: Cryptoloop Information Disclosure Vulnerability (CAN-2004-2135)
Summary: Kernel: Cryptoloop Information Disclosure Vulnerability (CAN-2004-2135)
Status: RESOLVED UPSTREAM
Alias: None
Product: Gentoo Security
Classification: Unclassified
Component: Kernel (show other bugs)
Hardware: All Other
: High normal (vote)
Assignee: Gentoo Security
URL: http://www.securityfocus.com/bid/13775
Whiteboard: [linux <2.6.12]
Keywords:
Depends on:
Blocks:
 
Reported: 2005-05-27 08:00 UTC by Jean-François Brunette (RETIRED)
Modified: 2009-08-21 19:05 UTC (History)
0 users

See Also:
Package list:
Runtime testing required: ---


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Description Jean-François Brunette (RETIRED) gentoo-dev 2005-05-27 08:00:31 UTC
Both cryptoloop and dm-crypt are reported prone to an information disclosure vulnerability. Reports indicate that certain watermarked files may be detected on a filesystem that is encrypted using the affected loop device encryption schemes.

It should be noted that a successful attack would reveal the presence of a watermarked file but not the file contents. 

The following exploit is available:

# /data/vulnerabilities/exploits/cryptoloop-exploit.tar.bz2
Comment 1 Tim Yamin (RETIRED) gentoo-dev 2005-06-18 03:12:07 UTC
Closing as upstream - this seems to be a bad implementation of AES for
cryptoloop in general rather than a specific issue relating to some code so
upstream will have to remove it/fix it.