CVE Database

CVE-2009-4308

Impact: Moderate
Public: 2009-07-27
Bugzilla: 547255: CVE-2009-4308 kernel: ext4: Avoid null pointer dereference when decoding EROFS w/o a journal
IAVA: 2010-A-0001

Details

The MITRE CVE dictionary describes this issue as:

The ext4_decode_error function in fs/ext4/super.c in the ext4 filesystem in the Linux kernel before 2.6.32 allows user-assisted remote attackers to cause a denial of service (NULL pointer dereference), and possibly have unspecified other impact, via a crafted read-only filesystem that lacks a journal.

Find out more about CVE-2009-4308 from the MITRE CVE dictionary and NIST NVD.

Statement

Red Hat is aware of this issue and is tracking it via the following bug:
https://bugzilla.redhat.com/CVE-2009-4308
The Linux kernel packages as shipped with Red Hat Enterprise Linux 3, 4 and Red Hat Enterprise MRG do not include support for EXT4, and therefore are not affected by this issue. This issue was addressed in Red Hat Enterprise Linux 5 via https://rhn.redhat.com/errata/RHSA-2010-0147.html.

CVSS v2 metrics

Base Score: 6.2
Base Metrics: AV:L/AC:H/Au:N/C:C/I:C/A:C
Access Vector: Local
Access Complexity: High
Authentication: None
Confidentiality Impact: Complete
Integrity Impact: Complete
Availability Impact: Complete

Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).

Red Hat security errata

Platform Errata Release Date
Red Hat Enterprise Linux version 5 (kernel) RHSA-2010:0147 March 17, 2010

External References

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For clarification or corrections please contact the Red Hat Security Response Team.