RHSA-2013:1195 - Security Advisory

Topic

Updated kernel packages that fix multiple security issues and several bugs
are now available for Red Hat OpenStack 3.0.

The Red Hat Security Response Team has rated this update as having
important security impact. Common Vulnerability Scoring System (CVSS) base
scores, which give detailed severity ratings, are available for each
vulnerability from the CVE links in the References section.

Description

Red Hat OpenStack 3.0 includes a custom Red Hat Enterprise Linux 6.4
kernel. These custom kernel packages include support for network
namespaces, this support is required to facilitate advanced OpenStack
Networking deployments.

This update fixes the following security issues:

• A flaw was found in the way the Linux kernel's Stream Control

Transmission Protocol (SCTP) implementation handled duplicate cookies. If a
local user queried SCTP connection information at the same time a remote
attacker has initialized a crafted SCTP connection to the system, it could
trigger a NULL pointer dereference, causing the system to crash.
(CVE-2013-2206, Important)

• An invalid free flaw was found in the Linux kernel's TCP/IP protocol

suite implementation. A local, unprivileged user could use this flaw to
corrupt kernel memory via crafted sendmsg() calls, allowing them to cause a
denial of service or, potentially, escalate their privileges on the system.
(CVE-2013-2224, Important)

• A flaw was found in the Linux kernel's Performance Events implementation.

On systems with certain Intel processors, a local, unprivileged user could
use this flaw to cause a denial of service by leveraging the perf subsystem
to write into the reserved bits of the OFFCORE_RSP_0 and OFFCORE_RSP_1
model-specific registers. (CVE-2013-2146, Moderate)

• An invalid pointer dereference flaw was found in the Linux kernel's

TCP/IP protocol suite implementation. A local, unprivileged user could use
this flaw to crash the system or, potentially, escalate their privileges on
the system by using sendmsg() with an IPv6 socket connected to an IPv4
destination. (CVE-2013-2232, Moderate)

• Information leak flaws in the Linux kernel's Bluetooth implementation

could allow a local, unprivileged user to leak kernel memory to user-space.
(CVE-2012-6544, Low)

• An information leak flaw in the Linux kernel could allow a privileged,

local user to leak kernel memory to user-space. (CVE-2013-2237, Low)

In addition, the following bugs and features have been addressed:
995409, 995125, 993251, 985838, 975974

More information on the Red Hat Enterprise Linux 6.4 kernel packages upon
which these custom kernel packages are based is available in
RHSA-2013:1173:

https://rhn.redhat.com/errata/RHSA-2013-1173.html

All Red Hat OpenStack 3.0 users deploying the OpenStack Networking service
are advised to install these updated packages.

Solution

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

Details on how to use the Red Hat Network to apply this update are
available at https://access.redhat.com/site/articles/11258

This Red Hat OpenStack 3.0 kernel may be installed by running this command
while logged in as the root user on a system that has the required
entitlements and subscriptions attached:

# yum install "kernel-2.6.*.openstack.el6.x86_64"

Documentation for both stable and preview releases of Red Hat OpenStack is
available at:

https://access.redhat.com/site/documentation/Red_Hat_OpenStack/

In particular it is highly recommended that all users read the Release
Notes document for the relevant Red Hat OpenStack release prior to
installation.

Affected Products

• Red Hat OpenStack grizzly x86_64

Fixes

• BZ - 922414 - CVE-2012-6544 Kernel: Bluetooth: HCI & L2CAP information leaks
• BZ - 971309 - CVE-2013-2146 Kernel: perf/x86: offcore_rsp valid mask for SNB/IVB
• BZ - 976562 - CVE-2013-2206 kernel: sctp: duplicate cookie handling NULL pointer dereference
• BZ - 979936 - CVE-2013-2224 kernel: net: IP_REPOPTS invalid free
• BZ - 981220 - CVE-2013-2237 Kernel: net: af_key: initialize satype in key_notify_policy_flush
• BZ - 981552 - CVE-2013-2232 Kernel: ipv6: using ipv4 vs ipv6 structure during routing lookup in sendmsg

CVEs

• CVE-2012-6544
• CVE-2013-2232
• CVE-2013-2224
• CVE-2013-2237
• CVE-2013-2206
• CVE-2013-2146

References

• https://access.redhat.com/security/updates/classification/#important
• https://access.redhat.com/site/documentation/Red_Hat_OpenStack/
• https://rhn.redhat.com/errata/RHSA-2013-1173.html