Bug 731172 - (CVE-2011-1833) CVE-2011-1833 kernel: ecryptfs: mount source TOCTOU race
CVE-2011-1833 kernel: ecryptfs: mount source TOCTOU race
Status: NEW
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
public=20110809,reported=20110801,sou...
: Security
Depends On: 731173 731174 731175 731176 748695
Blocks: 729914
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Reported: 2011-08-16 16:14 EDT by Petr Matousek
Modified: 2016-03-04 06:55 EST (History)
10 users (show)

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Description Petr Matousek 2011-08-16 16:14:32 EDT
Vasiliy Kulikov of Openwall and Dan Rosenberg discovered that eCryptfs incorrectly validated permissions on the requested source directory. A local attacker could use this flaw to mount an arbitrary directory, possibly leading to information disclosure.

Upstream fix:
764355487ea220fdc2faf128d577d7f679b91f97

References:
https://bugs.launchpad.net/ecryptfs/+bug/732628
Comment 3 Tomas Hoger 2011-08-17 03:03:59 EDT
(In reply to comment #0)
> Upstream fix:
> 764355487ea220fdc2faf128d577d7f679b91f97

http://git.kernel.org/?p=linux/kernel/git/ecryptfs/ecryptfs-2.6.git;a=commitdiff;h=764355487ea220fdc2faf128d577d7f679b91f97

ecryptfs-utils patch to make it use new mount option:
https://bugzilla.redhat.com/show_bug.cgi?id=729465#c2
Comment 4 Murray McAllister 2011-08-30 22:40:45 EDT
Acknowledgements:

Red Hat would like to thank the Ubuntu Security Team for reporting this issue. The Ubuntu Security Team acknowledges Vasiliy Kulikov of Openwall and Dan Rosenberg as the original reporters.
Comment 5 errata-xmlrpc 2011-10-05 17:48:06 EDT
This issue has been addressed in following products:

  Red Hat Enterprise Linux 6

Via RHSA-2011:1350 https://rhn.redhat.com/errata/RHSA-2011-1350.html
Comment 6 errata-xmlrpc 2011-10-20 13:29:07 EDT
This issue has been addressed in following products:

  Red Hat Enterprise Linux 5

Via RHSA-2011:1386 https://rhn.redhat.com/errata/RHSA-2011-1386.html
Comment 7 Eugene Teo (Security Response) 2011-10-25 00:09:59 EDT
Created kernel tracking bugs for this issue

Affects: fedora-all [bug 748695]

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