Bug 731172 (CVE-2011-1833) - CVE-2011-1833 kernel: ecryptfs: mount source TOCTOU race
Summary: CVE-2011-1833 kernel: ecryptfs: mount source TOCTOU race
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2011-1833
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 731173 731174 731175 731176 748695
Blocks: 729914
TreeView+ depends on / blocked
 
Reported: 2011-08-16 20:14 UTC by Petr Matousek
Modified: 2023-05-12 18:50 UTC (History)
6 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2021-10-19 21:49:38 UTC

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2011:1350 0 normal SHIPPED_LIVE Important: kernel security, bug fix, and enhancement update 2011-10-05 21:47:16 UTC
Red Hat Product Errata RHSA-2011:1386 0 normal SHIPPED_LIVE Important: kernel security, bug fix, and enhancement update 2011-10-20 17:28:15 UTC

Description Petr Matousek 2011-08-16 20:14:32 UTC 
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 07:03:59 UTC 
(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 2011-08-31 02:40:45 UTC 
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 21:48:06 UTC 
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 17:29:07 UTC 
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 04:09:59 UTC 
Created kernel tracking bugs for this issue

Affects: fedora-all [bug 748695]
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