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Date: Sat, 1 Dec 2012 21:58:43 +0100
From: Timo Warns <Warns@...-Sense.DE>
To: oss-security@...ts.openwall.com
Subject: CVE request: TSK misrepresents "." files on FAT filesystems
The Sleuth Kit misrepresents files named "." on FAT filesystems. An
attacker could rename a file to "." to evade detection by a forensic
analysis.
Affected is the current version 4.0.1. Older versions are probably
affected as well.
No patch is currently available. The bug is tracked at
http://sourceforge.net/tracker/?func=detail&aid=3523019&group_id=55685&atid=477889
AFAICS, the bug was originally identified by Wim Bertels
http://sourceforge.net/mailarchive/forum.php?thread_name=1305739444.2355.35.camel%40zwerfkat&forum_name=sleuthkit-users
Further discussion is at
http://sourceforge.net/mailarchive/forum.php?thread_name=20120503111900.GL18142%40hauptmenue&forum_name=sleuthkit-users
The vulnerability is already exploited, for example, by the Flame
malware (possibly unintendedly). Flame uses an encrypted SQLite-DB named
"." for extraction of confidential files and for update distribution.
An analyst may miss the file as the Sleuth Kit does not appropriately
show the file.
http://labs.bitdefender.com/2012/06/flame-the-story-of-leaked-data-carried-by-human-vector/
http://blog.crysys.hu/2012/06/flame-usb-dot-file-confirmed/
Regards, Timo
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