Bug 731172 (CVE-2011-1833)

Summary:	CVE-2011-1833 kernel: ecryptfs: mount source TOCTOU race
Product:	[Other] Security Response	Reporter:	Petr Matousek <pmatouse>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	arozansk, dhoward, fhrbata, kernel-mgr, nobody, peterm
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-10-19 21:49:38 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	731173, 731174, 731175, 731176, 748695
Bug Blocks:	729914

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]