CVE-2009-4021

Impact:
Important
Public Date:
2009-10-22
IAVA:
2010-A-0015
Bugzilla:
538734: CVE-2009-4021 kernel: fuse: prevent fuse_put_request on invalid pointer

The MITRE CVE dictionary describes this issue as:

The fuse_direct_io function in fs/fuse/file.c in the fuse subsystem in the Linux kernel before 2.6.32-rc7 might allow attackers to cause a denial of service (invalid pointer dereference and OOPS) via vectors possibly related to a memory-consumption attack.

Find out more about CVE-2009-4021 from the MITRE CVE dictionary 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-2009-4021 The Linux kernel packages as shipped with Red Hat Enterprise Linux 3 and 4 do not include support for FUSE, and therefore are not affected by this issue. It was addressed in Red Hat Enterprise Linux 5 via https://rhn.redhat.com/errata/RHSA-2010-0046.html A future kernel update for Red Hat Enterprise MRG will address this flaw.

CVSS v2 metrics

NOTE: The following CVSS v2 metrics and score provided are preliminary and subject to review.

Base Score 4.6
Base Metrics AV:L/AC:L/Au:S/C:N/I:N/A:C
Access Vector Local
Access Complexity Low
Authentication Single
Confidentiality Impact None
Integrity Impact None
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-2010:0046 2010-01-19
MRG Grid for RHEL 5 Server (kernel-rt) RHSA-2010:0041 2010-01-21