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.
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
mrg-1 is affected by CONFIG_EXT4DEV_FS is not set by default.
CVSS2 score of medium, 4.9 (AV:L/AC:L/Au:N/C:N/I:N/A:C)
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
All children bugs closed, parent no longer needed