Synopsis

Important: kernel-rt security and bug fix update

Type/Severity

Security Advisory: Important

Topic

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.

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.

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.

Affected Products

• MRG Realtime 2 x86_64

Fixes

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

CVEs

• CVE-2013-4299
• CVE-2013-0343
• CVE-2013-4345
• CVE-2013-4343
• CVE-2013-4348
• CVE-2013-2895
• CVE-2013-2896
• CVE-2013-2888
• CVE-2013-4387
• CVE-2013-2892
• CVE-2013-2893
• CVE-2013-4350

References

• https://access.redhat.com/security/updates/classification/#important

MRG Realtime 2

SRPM
kernel-rt-3.8.13-rt14.25.el6rt.src.rpm	SHA-256: 3977b5015d445261a6cc791e1d06ce3500658935373b3cc48dc040ac89bb2708
x86_64
kernel-rt-3.8.13-rt14.25.el6rt.x86_64.rpm	SHA-256: e98e95e7ab7e83d26ed4ff061c14f25e73090f88b0ca14f1cb88a5e9e04f33fa
kernel-rt-debug-3.8.13-rt14.25.el6rt.x86_64.rpm	SHA-256: dd3289040b6aeb6685cd1779687135d4860dcacd3ec24765156337a30173fd76
kernel-rt-debug-debuginfo-3.8.13-rt14.25.el6rt.x86_64.rpm	SHA-256: 6ae84998f65f2532dc113a13fefd2ae623cb4982df7096e3956e65d6e37e4357
kernel-rt-debug-devel-3.8.13-rt14.25.el6rt.x86_64.rpm	SHA-256: a3141f64f42ad2c37f130089243cea833d1a9e281822af64bf6c067c711d0b46
kernel-rt-debuginfo-3.8.13-rt14.25.el6rt.x86_64.rpm	SHA-256: 6cc315872c9f9276d2faf7a94d815c1bfba56c8e49709bff7ec65e9a7bb54a6c
kernel-rt-debuginfo-common-x86_64-3.8.13-rt14.25.el6rt.x86_64.rpm	SHA-256: 4592f4c704020ac7d52283ae65be47d03f639fa7fba246f400026c358ec397b8
kernel-rt-devel-3.8.13-rt14.25.el6rt.x86_64.rpm	SHA-256: 400a52e7b986aa6ee49b68cc6e5feaf4e38e8c5537f0170af21afd03990dc323
kernel-rt-doc-3.8.13-rt14.25.el6rt.noarch.rpm	SHA-256: 3166dfc04126bc10b6501a334b5968f10d6296c9417487e68a03284baff0d634
kernel-rt-firmware-3.8.13-rt14.25.el6rt.noarch.rpm	SHA-256: 31f3d7cbd5952aaf81c4fba93fba246e31d6127dcfad07fe61ef192f1278fa57
kernel-rt-trace-3.8.13-rt14.25.el6rt.x86_64.rpm	SHA-256: 4080102497bed1e41a8b9973bc859fc021a8b83901d5f02ee49b9030d605ccb2
kernel-rt-trace-debuginfo-3.8.13-rt14.25.el6rt.x86_64.rpm	SHA-256: b83b1c94c3351c45e4c128846f809d3b051b05562b7b01f3a5c57a979fb9f90a
kernel-rt-trace-devel-3.8.13-rt14.25.el6rt.x86_64.rpm	SHA-256: 3298a3fcbb8907d025e080e7837668d6275aa1a8edfaf63ffa3d408a0f45779d
kernel-rt-vanilla-3.8.13-rt14.25.el6rt.x86_64.rpm	SHA-256: f741e58062290f740485dd51f05dd2de96150402c2b41f282c619b9756b32467
kernel-rt-vanilla-debuginfo-3.8.13-rt14.25.el6rt.x86_64.rpm	SHA-256: 643e9baa6a0c58a529082a28d00056aafef831389090f8afc238ac67c9e245b9
kernel-rt-vanilla-devel-3.8.13-rt14.25.el6rt.x86_64.rpm	SHA-256: ad63c8c91ba5776f44e24ea65d9f7444743ec8b37a69a27bec5421ea58fe47a6
mrg-rt-release-3.8.13-rt14.25.el6rt.noarch.rpm	SHA-256: 64cbdd4f75167b46b9de9144234d3bb9fe8de3ce7292b009c2ceb181149c9693