Bug 487945 (CVE-2009-0748)

Summary: CVE-2009-0748 kernel: ext4: ext4_fill_super() missing validation issue
Product: [Other] Security Response Reporter: Eugene Teo (Security Response) <eteo>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: unspecifiedCC: anton, dhoward, esandeen, jpirko, kseifried, lgoncalv, lwang, rwheeler
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: 2011-10-25 17:45:42 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: 487946, 487947    
Bug Blocks:    
Attachments:
Description Flags
corrupted image none

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