487929 – (CVE-2009-0745) CVE-2009-0745 kernel: ext4: ext4_group_add() missing initialisation issue

Bug 487929 (CVE-2009-0745) - CVE-2009-0745 kernel: ext4: ext4_group_add() missing initialisation issue

Summary: CVE-2009-0745 kernel: ext4: ext4_group_add() missing initialisation issue

Keywords:
Status:	CLOSED ERRATA
Alias:	CVE-2009-0745
Product:	Security Response
Classification:	Other
Component:	vulnerability
Sub Component:
Version:	unspecified
Hardware:	All
OS:	Linux
Priority:	low
Severity:	low
Target Milestone:	---
Assignee:	Red Hat Product Security
QA Contact:
Docs Contact:
URL:
Whiteboard:
Depends On:	487932 487933
Blocks:
TreeView+	depends on / blocked

Reported:	2009-03-01 14:33 UTC by Eugene Teo (Security Response)
Modified:	2021-11-12 19:55 UTC (History)
CC List:	8 users (show)
Fixed In Version:
Doc Type:	Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed:	2011-10-25 17:38:36 UTC
Embargoed:

Attachments	(Terms of Use)

Links
System	ID	Private	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2009:1243	0	normal	SHIPPED_LIVE	Important: Red Hat Enterprise Linux 5.4 kernel security and bug fix update	2009-09-01 08:53:34 UTC

Description Eugene Teo (Security Response) 2009-03-01 14:33:26 UTC

Description of problem:
Name: CVE-2009-0745
Status: Candidate
URL: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0745
Final-Decision: 
Interim-Decision: 
Modified: 
Proposed: 
Assigned: 20090227
Category: 
Reference: CONFIRM:http://bugzilla.kernel.org/show_bug.cgi?id=12433
Reference: CONFIRM:http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=fdff73f094e7220602cc3f8959c7230517976412
Reference: CONFIRM:http://kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.27.19
Reference: CONFIRM:http://kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.28.7
Reference: VUPEN:ADV-2009-0509
Reference: URL:http://www.vupen.com/english/advisories/2009/0509

The ext4_group_add function in fs/ext4/resize.c in the Linux kernel 2.6.27 before 2.6.27.19 and 2.6.28 before 2.6.28.7 does not properly initialize the group descriptor during a resize (aka resize2fs) operation, which might allow local users to cause a denial of service (OOPS) by arranging for crafted values to be present in available memory.

Comment 2 Eugene Teo (Security Response) 2009-03-01 14:44:07 UTC

mrg-1 is affected by CONFIG_EXT4DEV_FS is not set by default.

Comment 5 Eugene Teo (Security Response) 2009-03-01 16:01:17 UTC

Steps to reproduce:
1) run resize2fs /dev/vgX/name (ext4 formatted lvm2 volume)

Comment 9 Eugene Teo (Security Response) 2009-03-19 04:16:49 UTC

CVSS2 score of medium, 4.9 (AV:L/AC:L/Au:N/C:N/I:N/A:C)

Comment 11 errata-xmlrpc 2009-09-02 08:01:32 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 5

Via RHSA-2009:1243 https://rhn.redhat.com/errata/RHSA-2009-1243.html

Comment 12 errata-xmlrpc 2009-09-02 09:06:41 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 5

Via RHSA-2009:1243 https://rhn.redhat.com/errata/RHSA-2009-1243.html

Comment 13 errata-xmlrpc 2009-09-02 12:07:53 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 5

Via RHSA-2009:1243 https://rhn.redhat.com/errata/RHSA-2009-1243.html

Comment 16 Kurt Seifried 2011-10-25 17:38:36 UTC

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