Bug 487942 (CVE-2009-0747)

Summary: CVE-2009-0747 kernel: ext4: ext4_isize() denial of service
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 17:41:05 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: 487943, 487944    
Bug Blocks:    
Attachments:
Description Flags
corrupted image none

Description Eugene Teo (Security Response) 2009-03-01 15:49:34 UTC 
Description of problem:
Name: CVE-2009-0747
Status: Candidate
URL: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0747
Final-Decision: 
Interim-Decision: 
Modified: 
Proposed: 
Assigned: 20090227
Category: 
Reference: CONFIRM:http://bugzilla.kernel.org/show_bug.cgi?id=12375
Reference: CONFIRM:http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=06a279d636734da32bb62dd2f7b0ade666f65d7c
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_isize function in fs/ext4/ext4.h in the Linux kernel 2.6.27 before 2.6.27.19 and 2.6.28 before 2.6.28.7 uses the i_size_high structure member during operations on arbitrary types of files, which allows local users to cause a denial of service (CPU consumption and error-message flood) by attempting to mount a crafted ext4 filesystem.
Comment 1 Eugene Teo (Security Response) 2009-03-01 15:52:10 UTC 
Created attachment 333652 [details]
corrupted image

Steps to reproduce:
bunzip the image file enclosed and mount the image with  mount -t ext4 -o loop
ext4.img /media/tmp
Comment 2 Eugene Teo (Security Response) 2009-03-01 15:52:45 UTC 
mrg-1 is affected by CONFIG_EXT4DEV_FS is not set by default.
Comment 7 Eugene Teo (Security Response) 2009-03-19 04:17:29 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 08:01:37 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 09:06:47 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 12:08:00 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 17:41:05 UTC 
All children bugs closed, parent no longer needed