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

Synopsis:          Important: kernel-rt security and bug fix update
Advisory ID:       RHSA-2013:1490-01
Product:           Red Hat Enterprise MRG for RHEL-6
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2013-1490.html
Issue date:        2013-10-31
CVE Names:         CVE-2013-0343 CVE-2013-2888 CVE-2013-2892 
                   CVE-2013-2893 CVE-2013-2895 CVE-2013-2896 
                   CVE-2013-4299 CVE-2013-4343 CVE-2013-4345 
                   CVE-2013-4348 CVE-2013-4350 CVE-2013-4387 
=====================================================================

1. Summary:

Updated kernel-rt packages that fix multiple security issues and one bug
are now available for Red Hat Enterprise MRG 2.4.

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.

2. Relevant releases/architectures:

MRG Realtime for RHEL 6 Server v.2 - noarch, x86_64

3. Description:

The kernel-rt packages contain the Linux kernel, the core of any Linux
operating system.

* A flaw was found in the way IP packets with an Internet Header Length
(ihl) of zero were processed in the skb_flow_dissect() function in the
Linux kernel. A remote attacker could use this flaw to trigger an infinite
loop in the kernel, leading to a denial of service. (CVE-2013-4348,
Important)

* A flaw was found in the way the Linux kernel's IPv6 implementation
handled certain UDP packets when the UDP Fragmentation Offload (UFO)
feature was enabled. A remote attacker could use this flaw to crash the
system or, potentially, escalate their privileges on the system.
(CVE-2013-4387, Important)

* A flaw was found in the way the Linux kernel handled the creation of
temporary IPv6 addresses. If the IPv6 privacy extension was enabled
(/proc/sys/net/ipv6/conf/eth0/use_tempaddr set to '2'), an attacker on
the local network could disable IPv6 temporary address generation, leading
to a potential information disclosure. (CVE-2013-0343, Moderate)

* A flaw was found in the way the Linux kernel handled HID (Human Interface
Device) reports with an out-of-bounds Report ID. An attacker with physical
access to the system could use this flaw to crash the system or,
potentially, escalate their privileges on the system. (CVE-2013-2888,
Moderate)

* Heap-based buffer overflow flaws were found in the way the
Pantherlord/GreenAsia game controller driver, the Logitech force feedback
drivers, and the Logitech Unifying receivers driver handled HID reports.
An attacker with physical access to the system could use these flaws to
crash the system or, potentially, escalate their privileges on the system.
(CVE-2013-2892, CVE-2013-2893, CVE-2013-2895, Moderate)

* A NULL pointer dereference flaw was found in the way the N-Trig touch
screen driver handled HID reports. An attacker with physical access to the
system could use this flaw to crash the system, resulting in a denial of
service. (CVE-2013-2896, Moderate)

* An information leak flaw was found in the way the Linux kernel's device
mapper subsystem, under certain conditions, interpreted data written to
snapshot block devices. An attacker could use this flaw to read data from
disk blocks in free space, which are normally inaccessible. (CVE-2013-4299,
Moderate)

* A use-after-free flaw was found in the tun_set_iff() function in the
Universal TUN/TAP device driver implementation in the Linux kernel.
A privileged user could use this flaw to crash the system or, potentially,
further escalate their privileges on the system. (CVE-2013-4343, Moderate)

* An off-by-one flaw was found in the way the ANSI CPRNG implementation in
the Linux kernel processed non-block size aligned requests. This could lead
to random numbers being generated with less bits of entropy than expected
when ANSI CPRNG was used. (CVE-2013-4345, Moderate)

* A flaw was found in the way the Linux kernel's IPv6 SCTP implementation
interacted with the IPsec subsystem. This resulted in unencrypted SCTP
packets being sent over the network even though IPsec encryption was
enabled. An attacker able to inspect these SCTP packets could use this flaw
to obtain potentially sensitive information. (CVE-2013-4350, Moderate)

Red Hat would like to thank Fujitsu for reporting CVE-2013-4299 and Stephan
Mueller for reporting CVE-2013-4345. The CVE-2013-4348 issue was discovered
by Jason Wang of Red Hat.

Bug fix:

* RoCE appeared to be supported in the MRG Realtime kernel even when the
required user space packages from the HPN channel were not installed.
The Realtime kernel now checks for the HPN channel packages before exposing
the RoCE interfaces. RoCE devices appear as plain 10GigE devices if the
needed HPN channel user space packages are not installed. (BZ#1012993)

Users should upgrade to these updated packages, which upgrade the kernel-rt
kernel to version kernel-rt-3.8.13-rt14, and correct these issues.
The system must be rebooted for this update to take effect.

4. Solution:

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

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

To install kernel packages manually, use "rpm -ivh [package]". Do not use
"rpm -Uvh" as that will remove the running kernel binaries from your
system. You may use "rpm -e" to remove old kernels after determining that
the new kernel functions properly on your system.

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

914664 - CVE-2013-0343 kernel: handling of IPv6 temporary addresses
1000360 - CVE-2013-2895 Kernel: HID: logitech-dj: heap overflow flaw
1000414 - CVE-2013-2893 Kernel: HID: LG: heap overflow flaw
1000429 - CVE-2013-2892 Kernel: HID: pantherlord: heap overflow flaw
1000451 - CVE-2013-2888 Kernel: HID: memory corruption flaw
1000494 - CVE-2013-2896 Kernel: HID: ntrig: NULL pointer dereference
1004233 - CVE-2013-4299 kernel: dm: dm-snapshot data leak
1007690 - CVE-2013-4345 kernel: ansi_cprng: off by one error in non-block size request
1007733 - CVE-2013-4343 Kernel: net: use-after-free TUNSETIFF
1007872 - CVE-2013-4350 kernel: net: sctp: ipv6 ipsec encryption bug in sctp_v6_xmit
1007939 - CVE-2013-4348 kernel: net: deadloop path in skb_flow_dissect()
1011927 - CVE-2013-4387 Kernel: net: IPv6: panic when UFO=On for an interface
1012993 - mlx4: Don't show RoCE interfaces if the hpn channel is not installed

6. Package List:

MRG Realtime for RHEL 6 Server v.2:

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/RHEMRG-RHEL6/SRPMS/kernel-rt-3.8.13-rt14.25.el6rt.src.rpm

noarch:
kernel-rt-doc-3.8.13-rt14.25.el6rt.noarch.rpm
kernel-rt-firmware-3.8.13-rt14.25.el6rt.noarch.rpm
mrg-rt-release-3.8.13-rt14.25.el6rt.noarch.rpm

x86_64:
kernel-rt-3.8.13-rt14.25.el6rt.x86_64.rpm
kernel-rt-debug-3.8.13-rt14.25.el6rt.x86_64.rpm
kernel-rt-debug-debuginfo-3.8.13-rt14.25.el6rt.x86_64.rpm
kernel-rt-debug-devel-3.8.13-rt14.25.el6rt.x86_64.rpm
kernel-rt-debuginfo-3.8.13-rt14.25.el6rt.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-3.8.13-rt14.25.el6rt.x86_64.rpm
kernel-rt-devel-3.8.13-rt14.25.el6rt.x86_64.rpm
kernel-rt-trace-3.8.13-rt14.25.el6rt.x86_64.rpm
kernel-rt-trace-debuginfo-3.8.13-rt14.25.el6rt.x86_64.rpm
kernel-rt-trace-devel-3.8.13-rt14.25.el6rt.x86_64.rpm
kernel-rt-vanilla-3.8.13-rt14.25.el6rt.x86_64.rpm
kernel-rt-vanilla-debuginfo-3.8.13-rt14.25.el6rt.x86_64.rpm
kernel-rt-vanilla-devel-3.8.13-rt14.25.el6rt.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://access.redhat.com/security/team/key/#package

7. References:

https://www.redhat.com/security/data/cve/CVE-2013-0343.html
https://www.redhat.com/security/data/cve/CVE-2013-2888.html
https://www.redhat.com/security/data/cve/CVE-2013-2892.html
https://www.redhat.com/security/data/cve/CVE-2013-2893.html
https://www.redhat.com/security/data/cve/CVE-2013-2895.html
https://www.redhat.com/security/data/cve/CVE-2013-2896.html
https://www.redhat.com/security/data/cve/CVE-2013-4299.html
https://www.redhat.com/security/data/cve/CVE-2013-4343.html
https://www.redhat.com/security/data/cve/CVE-2013-4345.html
https://www.redhat.com/security/data/cve/CVE-2013-4348.html
https://www.redhat.com/security/data/cve/CVE-2013-4350.html
https://www.redhat.com/security/data/cve/CVE-2013-4387.html
https://access.redhat.com/security/updates/classification/#important

8. Contact:

The Red Hat security contact is <secalert@redhat.com>.  More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2013 Red Hat, Inc.
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