====================================================================                   Red Hat Security Advisory

Synopsis:          Important: udev security update
Advisory ID:       RHSA-2009:0427-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2009-0427.html
Issue date:        2009-04-16
CVE Names:         CVE-2009-1185 
====================================================================
1. Summary:

Updated udev packages that fix one security issue are now available for Red
Hat Enterprise Linux 5.

This update has been rated as having important security impact by the Red
Hat Security Response Team.

2. Relevant releases/architectures:

RHEL Desktop Workstation (v. 5 client) - i386, x86_64
Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, x86_64
Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64

3. Description:

udev provides a user-space API and implements a dynamic device directory,
providing only the devices present on the system. udev replaces devfs in
order to provide greater hot plug functionality. Netlink is a datagram
oriented service, used to transfer information between kernel modules and
user-space processes.

It was discovered that udev did not properly check the origin of Netlink
messages. A local attacker could use this flaw to gain root privileges via
a crafted Netlink message sent to udev, causing it to create a
world-writable block device file for an existing system block device (for
example, the root file system). (CVE-2009-1185)

Red Hat would like to thank Sebastian Krahmer of the SUSE Security Team for
responsibly reporting this flaw.

Users of udev are advised to upgrade to these updated packages, which
contain a backported patch to correct this issue. After installing the
update, the udevd daemon will be restarted automatically.

4. Solution:

Before applying this update, make sure that all previously-released
errata relevant to your system have been applied.

This update is available via Red Hat Network.  Details on how to use
the Red Hat Network to apply this update are available at

5. Bugs fixed (https://bugzilla.redhat.com/):

495051 - CVE-2009-1185 udev: Uncheck origin of NETLINK messages

6. Package List:

Red Hat Enterprise Linux Desktop (v. 5 client):

Source:

i386:
libvolume_id-095-14.20.el5_3.i386.rpm
udev-095-14.20.el5_3.i386.rpm
udev-debuginfo-095-14.20.el5_3.i386.rpm

x86_64:
libvolume_id-095-14.20.el5_3.i386.rpm
libvolume_id-095-14.20.el5_3.x86_64.rpm
udev-095-14.20.el5_3.x86_64.rpm
udev-debuginfo-095-14.20.el5_3.i386.rpm
udev-debuginfo-095-14.20.el5_3.x86_64.rpm

RHEL Desktop Workstation (v. 5 client):

Source:

i386:
libvolume_id-devel-095-14.20.el5_3.i386.rpm
udev-debuginfo-095-14.20.el5_3.i386.rpm

x86_64:
libvolume_id-devel-095-14.20.el5_3.i386.rpm
libvolume_id-devel-095-14.20.el5_3.x86_64.rpm
udev-debuginfo-095-14.20.el5_3.i386.rpm
udev-debuginfo-095-14.20.el5_3.x86_64.rpm

Red Hat Enterprise Linux (v. 5 server):

Source:

i386:
libvolume_id-095-14.20.el5_3.i386.rpm
libvolume_id-devel-095-14.20.el5_3.i386.rpm
udev-095-14.20.el5_3.i386.rpm
udev-debuginfo-095-14.20.el5_3.i386.rpm

ia64:
libvolume_id-095-14.20.el5_3.ia64.rpm
libvolume_id-devel-095-14.20.el5_3.ia64.rpm
udev-095-14.20.el5_3.ia64.rpm
udev-debuginfo-095-14.20.el5_3.ia64.rpm

ppc:
libvolume_id-095-14.20.el5_3.ppc.rpm
libvolume_id-095-14.20.el5_3.ppc64.rpm
libvolume_id-devel-095-14.20.el5_3.ppc.rpm
libvolume_id-devel-095-14.20.el5_3.ppc64.rpm
udev-095-14.20.el5_3.ppc.rpm
udev-debuginfo-095-14.20.el5_3.ppc.rpm
udev-debuginfo-095-14.20.el5_3.ppc64.rpm

s390x:
libvolume_id-095-14.20.el5_3.s390.rpm
libvolume_id-095-14.20.el5_3.s390x.rpm
libvolume_id-devel-095-14.20.el5_3.s390.rpm
libvolume_id-devel-095-14.20.el5_3.s390x.rpm
udev-095-14.20.el5_3.s390x.rpm
udev-debuginfo-095-14.20.el5_3.s390.rpm
udev-debuginfo-095-14.20.el5_3.s390x.rpm

x86_64:
libvolume_id-095-14.20.el5_3.i386.rpm
libvolume_id-095-14.20.el5_3.x86_64.rpm
libvolume_id-devel-095-14.20.el5_3.i386.rpm
libvolume_id-devel-095-14.20.el5_3.x86_64.rpm
udev-095-14.20.el5_3.x86_64.rpm
udev-debuginfo-095-14.20.el5_3.i386.rpm
udev-debuginfo-095-14.20.el5_3.x86_64.rpm

These packages are GPG signed by Red Hat for security.  Our key and 
details on how to verify the signature are available from
https://www.redhat.com/security/team/key/#package

7. References:

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-1185
https://www.redhat.com/security/updates/classification/#important

8. Contact:

The Red Hat security contact is .  More contact
details at https://www.redhat.com/security/team/contact/

Copyright 2009 Red Hat, Inc.