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Test ID:
Category:Red Hat Local Security Checks
Title:RedHat Update for kernel RHSA-2013:1292-01
Summary:The remote host is missing an update for the 'kernel'; package(s) announced via the referenced advisory.
The remote host is missing an update for the 'kernel'
package(s) announced via the referenced advisory.

Vulnerability Insight:
The kernel packages contain the Linux kernel, the core of any Linux
operating system.

This update fixes the following security issues:

* A use-after-free flaw was found in the madvise() system call
implementation in the Linux kernel. A local, unprivileged user could use
this flaw to cause a denial of service or, potentially, escalate their
privileges. (CVE-2012-3511, Moderate)

* A flaw was found in the way the Linux kernel's TCP/IP protocol suite
implementation handled IPv6 sockets that used the UDP_CORK option. A local,
unprivileged user could use this flaw to cause a denial of service.
(CVE-2013-4162, Moderate)

* An information leak flaw in the Linux kernel could allow a local,
unprivileged user to leak kernel memory to user-space. (CVE-2013-2141, Low)

Red Hat would like to thank Hannes Frederic Sowa for reporting

This update also fixes the following bugs:

* A bug in the be2net driver prevented communication between NICs using
be2net. This update applies a patch addressing this problem along with
several other upstream patches that fix various other problems. Traffic
between NICs using the be2net driver now proceeds as expected. (BZ#983864)

* A recent patch fixing a problem that prevented communication between
NICs using the be2net driver caused the firmware of NICs to become
unresponsive, and thus triggered a kernel panic. The problem was caused by
unnecessary usage of a hardware workaround that allows skipping VLAN tag
insertion. A patch has been applied and the workaround is now used only
when the multi-channel configuration is enabled on the NIC. Note that the
bug only affected the NICs with firmware version 4.2.xxxx. (BZ#999819)

* A bug in the autofs4 mount expiration code could cause the autofs4
module to falsely report a busy tree of NFS mounts as 'not in use'.
Consequently, automount attempted to unmount the tree and failed with
a 'failed to umount offset' error, leaving the mount tree to appear as
empty directories. A patch has been applied to remove an incorrectly used
autofs dentry mount check and the aforementioned problem no longer occurs.

* A race condition in the be_open function in the be2net driver could
trigger the BUG_ON() macro, which resulted in a kernel panic. A patch
addressing this problem has been applied and the race condition is now
avoided by enabling polling before enabling interrupts globally. The
kernel no longer panics in this situation. (BZ#1005239)

All kernel users are advised to upgrade to these updated packages, which
contain backported patches to correct these issues. The system must be
rebooted for this update to take effect.

Affected Software/OS:
kernel on Red Hat Enterprise Linux (v. 5 server)

Please Install the Updated Packages.

CVSS Score:

CVSS Vector:

Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2012-3511
BugTraq ID: 55151
Common Vulnerability Exposure (CVE) ID: CVE-2013-2141
Debian Security Information: DSA-2766 (Google Search)
RedHat Security Advisories: RHSA-2013:1801
SuSE Security Announcement: openSUSE-SU-2013:1971 (Google Search)
Common Vulnerability Exposure (CVE) ID: CVE-2013-4162
BugTraq ID: 61411
RedHat Security Advisories: RHSA-2013:1436
RedHat Security Advisories: RHSA-2013:1460
RedHat Security Advisories: RHSA-2013:1520
SuSE Security Announcement: SUSE-SU-2013:1473 (Google Search)
SuSE Security Announcement: SUSE-SU-2013:1474 (Google Search)
CopyrightCopyright (c) 2013 Greenbone Networks GmbH

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