National Cyber-Alert System
Vulnerability Summary for CVE-2009-0747
Original release date:02/27/2009
Last revised:04/16/2009
Source:
US-CERT/NIST
Overview
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.
Impact
CVSS Severity (version 2.0):
Impact Subscore:
6.9
Exploitability Subscore:
3.9
CVSS Version 2 Metrics:
Access Vector: Locally exploitable
Access Complexity: Low
Authentication: Not required to exploit
Impact Type:Allows disruption of serviceUnknown
- Official Statement from Red Hat (03/02/2009)
-
Red Hat is aware of this issue and is tracking it via the following bug:
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=CVE-2009-0747
This issue did not affect the versions of Linux kernel as shipped with Red Hat Enterprise Linux 2.1, 3, 4, and Red Hat Enterprise MRG. Future kernel update in Red Hat Enterprise Linux 5 will address this flaw.
References to Advisories, Solutions, and Tools
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External Source: CONFIRM
Name: http://bugzilla.kernel.org/show_bug.cgi?id=12375
Type: Patch Information
External Source: VUPEN
Name: ADV-2009-0509
Type: Advisory
External Source: UBUNTU
Name: USN-751-1
External Source: DEBIAN
Name: DSA-1749
External Source: SECUNIA
Name: 34394
External Source: CONFIRM
Name: http://kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.28.7
External Source: CONFIRM
Name: http://kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.27.19
External Source: CONFIRM
Name: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=06a279d636734da32bb62dd2f7b0ade666f65d7c