Bug 601006 (CVE-2010-2066)

Summary:	CVE-2010-2066 kernel: ext4: Make sure the MOVE_EXT ioctl can't overwrite append-only files
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:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	arozansk, dhoward, esandeen, peterm, plyons, rkhan
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 09:12:13 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:	601007, 601008, 601009
Bug Blocks:

Description Eugene Teo (Security Response) 2010-06-07 00:43:39 UTC

Description of problem:
If the donor file is an append-only file, we should not allow the operation to proceed, lest we end up overwriting the contents of an append-only file.

Upstream commit:
http://git.kernel.org/linus/1f5a81e41f8b1a782c68d3843e9ec1bfaadf7d72

Comment 1 Eugene Teo (Security Response) 2010-06-07 00:44:21 UTC

Acknowledgements:

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

Comment 3 Eugene Teo (Security Response) 2010-06-07 00:48:07 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 Ext4 filesystem. A future kernel update in Red Hat Enterprise Linux 5 will address this issue.

Comment 4 Eugene Teo (Security Response) 2010-06-07 00:54:12 UTC

Also see, http://www.gossamer-threads.com/lists/linux/kernel/1235423, but the regression don't look related.

Comment 6 Eric Sandeen 2010-06-07 17:31:55 UTC

(In reply to comment #4)
> Also see, http://www.gossamer-threads.com/lists/linux/kernel/1235423, but the
> regression don't look related.    

Right, that ended up being a mis-reported issue.  The patch at hand is not implicated in the user's problems.  See http://www.gossamer-threads.com/lists/linux/kernel/1235623#1235623

Comment 11 Chuck Ebbert 2010-07-23 18:06:59 UTC

Fixed in 2.6.33.6 and 2.6.34.1 by:

ext4-make-sure-the-move_ext-ioctl-can-t-overwrite-append-only-files.patch

Not yet fixed in 2.6.32-stable.

Comment 12 Fedora Update System 2010-08-03 00:58:41 UTC

kernel-2.6.32.16-150.fc12 has been pushed to the Fedora 12 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 13 errata-xmlrpc 2010-08-10 18:01:57 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