487945 – (CVE-2009-0748) CVE-2009-0748 kernel: ext4: ext4_fill_super() missing validation issue

Bug 487945 (CVE-2009-0748) - CVE-2009-0748 kernel: ext4: ext4_fill_super() missing validation issue

Summary: CVE-2009-0748 kernel: ext4: ext4_fill_super() missing validation issue

Keywords:
Status:	CLOSED ERRATA
Alias:	CVE-2009-0748
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:	487946 487947
Blocks:
TreeView+	depends on / blocked

Reported:	2009-03-01 15:56 UTC by Eugene Teo (Security Response)
Modified:	2021-11-12 19:56 UTC (History)
CC List:	8 users (show)
Fixed In Version:
Doc Type:	Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed:	2011-10-25 17:45:42 UTC
Embargoed:

Attachments	(Terms of Use)
corrupted image (1.53 MB, application/x-gzip) 2009-03-01 16:02 UTC, Eugene Teo (Security Response)	no flags	Details
View All

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 15:56:04 UTC

Description of problem:
Name: CVE-2009-0748
Status: Candidate
URL: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0748
Final-Decision: 
Interim-Decision: 
Modified: 
Proposed: 
Assigned: 20090227
Category: 
Reference: CONFIRM:http://bugzilla.kernel.org/show_bug.cgi?id=12371
Reference: CONFIRM:http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=4ec110281379826c5cf6ed14735e47027c3c5765
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_fill_super function in fs/ext4/super.c in the Linux kernel 2.6.27 before 2.6.27.19 and 2.6.28 before 2.6.28.7 does not validate the superblock configuration, which allows local users to cause a denial of service (NULL pointer dereference and OOPS) by attempting to mount a crafted ext4 filesystem.

Comment 1 Eugene Teo (Security Response) 2009-03-01 16:02:57 UTC

Created attachment 333653 [details]
corrupted image

Steps to reproduce:
1) gunzip ext4.72.img.gz
2) mount -t ext4  -o loop ext4.72.img /media/tmp

Comment 2 Eugene Teo (Security Response) 2009-03-01 16:03:47 UTC

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

Comment 7 Eugene Teo (Security Response) 2009-03-19 04:19:02 UTC

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

Comment 8 errata-xmlrpc 2009-09-02 08:01:40 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 9 errata-xmlrpc 2009-09-02 09:06:50 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 10 errata-xmlrpc 2009-09-02 12:08:03 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 Kurt Seifried 2011-10-25 17:45:42 UTC

All children bugs closed, parent no longer needed

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