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Test ID:1.3.6.1.4.1.25623.1.0.870979
Category:Red Hat Local Security Checks
Title:RedHat Update for kernel RHSA-2013:0747-01
Summary:The remote host is missing an update for the 'kernel'; package(s) announced via the referenced advisory.
Description:Summary:
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 flaw was found in the Xen netback driver implementation in the Linux
kernel. A privileged guest user with access to a para-virtualized network
device could use this flaw to cause a long loop in netback, leading to a
denial of service that could potentially affect the entire system.
(CVE-2013-0216, Moderate)

* A flaw was found in the Xen PCI device back-end driver implementation in
the Linux kernel. A privileged guest user in a guest that has a PCI
passthrough device could use this flaw to cause a denial of service that
could potentially affect the entire system. (CVE-2013-0231, Moderate)

* A NULL pointer dereference flaw was found in the IP packet transformation
framework (XFRM) implementation in the Linux kernel. A local user who has
the CAP_NET_ADMIN capability could use this flaw to cause a denial of
service. (CVE-2013-1826, Moderate)

* Information leak flaws were found in the XFRM implementation in the
Linux kernel. A local user who has the CAP_NET_ADMIN capability could use
these flaws to leak kernel stack memory to user-space. (CVE-2012-6537, Low)

* An information leak flaw was found in the logical link control (LLC)
implementation in the Linux kernel. A local, unprivileged user could use
this flaw to leak kernel stack memory to user-space. (CVE-2012-6542, Low)

* Two information leak flaws were found in the Linux kernel's Asynchronous
Transfer Mode (ATM) subsystem. A local, unprivileged user could use these
flaws to leak kernel stack memory to user-space. (CVE-2012-6546, Low)

* An information leak flaw was found in the TUN/TAP device driver in the
Linux kernel's networking implementation. A local user with access to a
TUN/TAP virtual interface could use this flaw to leak kernel stack memory
to user-space. (CVE-2012-6547, Low)

Red Hat would like to thank the Xen project for reporting the CVE-2013-0216
and CVE-2013-0231 issues.

This update also fixes the following bugs:

* The IPv4 code did not correctly update the Maximum Transfer Unit (MTU) of
the designed interface when receiving ICMP Fragmentation Needed packets.
Consequently, a remote host did not respond correctly to ping attempts.
With this update, the IPv4 code has been modified so the MTU of the
designed interface is adjusted as expected in this situation. The ping
command now provides the expected output. (BZ#923353)

* Previously, the be2net code expected t ...

Description truncated, please see the referenced URL(s) for more information.

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

Solution:
Please Install the Updated Packages.

CVSS Score:
6.2

CVSS Vector:
AV:L/AC:H/Au:N/C:C/I:C/A:C

Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2012-6537
http://www.openwall.com/lists/oss-security/2013/03/05/13
RedHat Security Advisories: RHSA-2013:0744
http://rhn.redhat.com/errata/RHSA-2013-0744.html
http://www.ubuntu.com/usn/USN-1792-1
http://www.ubuntu.com/usn/USN-1798-1
Common Vulnerability Exposure (CVE) ID: CVE-2012-6542
RedHat Security Advisories: RHSA-2013:1645
http://rhn.redhat.com/errata/RHSA-2013-1645.html
http://www.ubuntu.com/usn/USN-1805-1
http://www.ubuntu.com/usn/USN-1808-1
Common Vulnerability Exposure (CVE) ID: CVE-2012-6546
Common Vulnerability Exposure (CVE) ID: CVE-2012-6547
http://www.mandriva.com/security/advisories?name=MDVSA-2013:176
Common Vulnerability Exposure (CVE) ID: CVE-2013-0216
http://www.openwall.com/lists/oss-security/2013/02/05/12
SuSE Security Announcement: SUSE-SU-2013:0674 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2013-04/msg00018.html
SuSE Security Announcement: openSUSE-SU-2013:0395 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2013-03/msg00004.html
SuSE Security Announcement: openSUSE-SU-2013:0925 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2013-06/msg00005.html
Common Vulnerability Exposure (CVE) ID: CVE-2013-0231
BugTraq ID: 57740
http://www.securityfocus.com/bid/57740
Debian Security Information: DSA-2632 (Google Search)
http://www.debian.org/security/2013/dsa-2632
http://www.openwall.com/lists/oss-security/2013/02/05/9
http://osvdb.org/89903
http://secunia.com/advisories/52059
XForce ISS Database: xen-pcibackenablemsi-dos(81923)
https://exchange.xforce.ibmcloud.com/vulnerabilities/81923
Common Vulnerability Exposure (CVE) ID: CVE-2013-1826
http://www.openwall.com/lists/oss-security/2013/03/07/2
http://www.ubuntu.com/usn/USN-1829-1
Common Vulnerability Exposure (CVE) ID: CVE-2013-0217
CopyrightCopyright (c) 2013 Greenbone Networks GmbH

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