full-disclosure - fusermount: Unmount any filesystem

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Message-ID: <4CD04DEB.6090504@halfdog.net>
Date: Tue, 02 Nov 2010 17:44:11 +0000
From: halfdog <me@...fdog.net>
To: full-disclosure@...ts.grok.org.uk
Subject: fusermount: Unmount any filesystem

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Hello List,

To evaluate the pros and cons of various disclosure methods, I'm trying
full disclosure this time:

At least on ubuntu lucid, the fusermount tool contains a timerace
mounting a user filesystem and updating mtab, thus mtab entries with
arbitrary path can be created. Crafted mtab entries can then be used to
unmount live parts of the filesystem.

http://www.halfdog.net/Security/FuseTimerace/

- -- 
http://www.halfdog.net/
PGP: 156A AE98 B91F 0114 FE88  2BD8 C459 9386 feed a bee
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