National Cyber-Alert System
Vulnerability Summary for CVE-2009-0746
Original release date:02/27/2009
Last revised:04/16/2009
Source:
US-CERT/NIST
Overview
The make_indexed_dir function in fs/ext4/namei.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 a certain rec_len field, which allows local users to cause a denial of service (OOPS) 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-2009-0746
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: XF
Name: linux-kernel-makeindexeddir-ext4-dos(48872)
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=e6b8bc09ba2075cd91fbffefcd2778b1a00bd76f
External Source: CONFIRM
Name: http://bugzilla.kernel.org/show_bug.cgi?id=12430
