Bug 605158 (CVE-2010-2226)

Summary:	CVE-2010-2226 kernel: xfs swapext ioctl minor security issue
Product:	[Other] Security Response	Reporter:	Eugene Teo (Security Response) <eteo>
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, davej, dhoward, jpirko, kmcmartin, lwang, plyons, pmatouse, tcallawa
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:	2012-03-28 08:56:13 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:	605160, 605161, 605162
Bug Blocks:

Description Eugene Teo (Security Response) 2010-06-17 10:37:38 UTC

Description of problem:
User "foo" can use the SWAPEXT ioctl to swap a write-only file owned by user "bar" into a file owned by "foo" and subsequently reading it. It does so by checking that the file descriptors passed to the ioctl are also opened for reading.

References:
http://archives.free.net.ph/message/20100616.130710.301704aa.en.html
http://archives.free.net.ph/message/20100616.135735.40f53a32.en.html

Comment 2 Eugene Teo (Security Response) 2010-06-17 11:01:24 UTC

Acknowledgements:

Red Hat would like to thank Dan Rosenberg for reporting this issue.

Comment 3 Eugene Teo (Security Response) 2010-06-17 11:02:19 UTC

Statement:

This issue did not affect the version of Linux kernel as shipped with Red Hat
Enterprise Linux 3, 4 and Red Hat Enterprise MRG as they did not include
support for the XFS filesystem. A future kernel update in Red Hat Enterprise
Linux 5 will address this issue.

Comment 4 Eugene Teo (Security Response) 2010-07-08 02:11:42 UTC

Upstream commit:
http://git.kernel.org/linus/1817176a86352f65210139d4c794ad2d19fc6b63

Comment 5 errata-xmlrpc 2010-08-10 18:01:50 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 5

Via RHSA-2010:0610 https://rhn.redhat.com/errata/RHSA-2010-0610.html