Security Advisory Important: kernel-rt security and bug fix update

Advisory: RHSA-2013:1264-1
Type: Security Advisory
Severity: Important
Issued on: 2013-09-16
Last updated on: 2013-09-16
Affected Products: Red Hat Enterprise MRG v2 for Red Hat Enterprise Linux (version 6)
CVEs ( CVE-2013-2058


Updated kernel-rt packages that fix several security issues and multiple
bugs are now available for Red Hat Enterprise MRG 2.3.

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.

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

This update fixes the following security issues:

* A heap-based buffer overflow flaw was found in the Linux kernel's iSCSI
target subsystem. A remote attacker could use a specially-crafted iSCSI
request to cause a denial of service on a system or, potentially, escalate
their privileges on that system. (CVE-2013-2850, 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)

* Two flaws were 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 these flaws to cause a denial of service.
(CVE-2013-4162, CVE-2013-4163, Moderate)

* A flaw was found in the Linux kernel's Chipidea USB driver. A local,
unprivileged user could use this flaw to cause a denial of service.
(CVE-2013-2058, Low)

* Information leak flaws in the Linux kernel could allow a privileged,
local user to leak kernel memory to user-space. (CVE-2013-2147,
CVE-2013-2164, CVE-2013-2234, CVE-2013-2237, Low)

* Information leak flaws in the Linux kernel could allow a local,
unprivileged user to leak kernel memory to user-space. (CVE-2013-2141,
CVE-2013-2148, Low)

* A format string flaw was found in the Linux kernel's block layer. A
privileged, local user could potentially use this flaw to escalate their
privileges to kernel level (ring0). (CVE-2013-2851, Low)

* A format string flaw was found in the b43_do_request_fw() function in the
Linux kernel's b43 driver implementation. A local user who is able to
specify the "fwpostfix" b43 module parameter could use this flaw to cause a
denial of service or, potentially, escalate their privileges.
(CVE-2013-2852, Low)

* A NULL pointer dereference flaw was found in the Linux kernel's ftrace
and function tracer implementations. A local user who has the CAP_SYS_ADMIN
capability could use this flaw to cause a denial of service.
(CVE-2013-3301, Low)

Red Hat would like to thank Kees Cook for reporting CVE-2013-2850,
CVE-2013-2851, and CVE-2013-2852; and Hannes Frederic Sowa for reporting
CVE-2013-4162 and CVE-2013-4163.

This update also fixes the following bugs:

* The following drivers have been updated, fixing a number of bugs:
myri10ge, bna, enic, mlx4, bgmac, bcma, cxgb3, cxgb4, qlcnic, r8169,
be2net, e100, e1000, e1000e, igb, ixgbe, brcm80211, cpsw, pch_gbe,
bfin_mac, bnx2x, bnx2, cnic, tg3, and sfc. (BZ#974138)

* The realtime kernel was not built with the CONFIG_NET_DROP_WATCH kernel
configuration option enabled. As such, attempting to run the dropwatch
command resulted in the following error:

Unable to find NET_DM family, dropwatch can't work
Cleaning up on socket creation error

With this update, the realtime kernel is built with the
CONFIG_NET_DROP_WATCH option, allowing dropwatch to work as expected.

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


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

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.

Updated packages

Red Hat Enterprise MRG v2 for Red Hat Enterprise Linux (version 6)

File outdated by:  RHSA-2017:1647
    MD5: 8f8d2153f14f445afc664bd131a25077
SHA-256: 4a8cf7dcff7e708273dfe327e79a5cec329964f5e76fe676671eea56f099fe9d
File outdated by:  RHSA-2017:1647
    MD5: 817277f4ea7433e1ceffc4275d0baa2d
SHA-256: f135a4aa5db1588a0062f0e7f52142613870c09710f7a4ff73736bb7be5b6960
File outdated by:  RHSA-2017:1647
    MD5: 86349270dbed427ee691a4714dab6c08
SHA-256: 2e657670e8b05d1ffbe5625d7dcbd377239db1788d50cc3ce9f41aea24c0f0a4
File outdated by:  RHSA-2017:1647
    MD5: 586c0b1698ff982d8647ca9a0b876ddf
SHA-256: 554d9ed9c8b14cc1695eb543fc85a625f76b87cf41c65b7bcf79246892e36eb3
File outdated by:  RHSA-2017:1647
    MD5: f0d3f9ad30948ff7a61b447f87790489
SHA-256: 0ba36fa1eb7922f501621ca8996dfaeb8740ef36083f942d913f2e802b97c203
File outdated by:  RHSA-2017:1647
    MD5: caeee9519b5ec21e9f90084177aeb0f5
SHA-256: 7ee8788cdb7ee47da27d209ea328badd024892548daf82f36346ded7081d2631
File outdated by:  RHSA-2017:1647
    MD5: 28acbe072624c93d5dd98b10d9686c06
SHA-256: ec1e5adaa25948e2cb2f82bad09dc2fbddb92e23d02dc0cf934c855e19cf9b53
File outdated by:  RHSA-2017:1647
    MD5: 5871157c939cfe01ab7917fd4781805b
SHA-256: 4dc5e923eb2a8584bfdfbabacb8501fc211fd4d5dded61ecc2b72bd17f398227
File outdated by:  RHSA-2017:1647
    MD5: bcfe6899f01bde919be8a4960331df1a
SHA-256: b902d8872d52c0dcc9ea1c20cbfceaecd4b9373b731b3a5aafcd892e23579f4d
File outdated by:  RHSA-2017:1647
    MD5: 6bf6443085905247547880fac37adf3f
SHA-256: f1625d900363956b763d8e7f76ec4a27326a62898c22d24af3cc4b395220617c
File outdated by:  RHSA-2017:1647
    MD5: ddfa40241d9f6f2c25894165dad16767
SHA-256: 0b46561e77dcebd700e173911d5dfcefb7e7a28d9e2bca07f52544cae7609ffc
File outdated by:  RHSA-2017:1647
    MD5: b35b70c3127e9936bc45d6418e06226f
SHA-256: 11131932fd05445d1a9416206ff4a390396fbd78cf2b0d91b293e983e7ce170a
File outdated by:  RHSA-2017:1647
    MD5: 8ea5fe3d67aa7235fec7567e7646c5a0
SHA-256: 0971d3ce431f13a08a63122b9b0a130c942c67fc10d48e146fe9198c4ef8bab7
File outdated by:  RHSA-2017:1647
    MD5: 61e08c15634809f383208b7b933d0e91
SHA-256: befe1eaafcdc0b11edcc4a99eb2c10ae1ba89c95f5ca2668b92898466e918b84
File outdated by:  RHSA-2017:1647
    MD5: 002a3abb0910c3864d68d91eab1dbd1b
SHA-256: bceb11977a5d1f796a2ea715775fac230a2338cde073c9c96011a8a8531b6295
File outdated by:  RHSA-2017:1647
    MD5: 98f922db2036e41083b5f4f53162a7e3
SHA-256: b8b2ee61e316dfe2e274e676c56cd9fdd5b846e540d5f144109d389f82dcc1c2
File outdated by:  RHSA-2013:1490
    MD5: 0fe6e5d19199b12bafdad3f8419be364
SHA-256: 54ec7a9a1cfc9e02e0ccc9fcf968ac24a8664b4bcfbcdeb7eb3405c66bfe020e
(The unlinked packages above are only available from the Red Hat Network)

Bugs fixed (see bugzilla for more information)

952197 - CVE-2013-3301 Kernel: tracing: NULL pointer dereference
959210 - CVE-2013-2058 Kernel: usb: chipidea: Allow disabling streaming not just in udc mode
968036 - CVE-2013-2850 kernel: iscsi-target: heap buffer overflow on large key error
969515 - CVE-2013-2851 kernel: block: passing disk names as format strings
969518 - CVE-2013-2852 kernel: b43: format string leaking into error msgs
970873 - CVE-2013-2141 Kernel: signal: information leak in tkill/tgkill
971242 - CVE-2013-2147 Kernel: cpqarray/cciss: information leak via ioctl
971258 - CVE-2013-2148 Kernel: fanotify: info leak in copy_event_to_user
971309 - CVE-2013-2146 Kernel: perf/x86: offcore_rsp valid mask for SNB/IVB
973100 - CVE-2013-2164 Kernel: information leak in cdrom driver
974138 - MRG 2.3 kernel drivers update
980995 - CVE-2013-2234 Kernel: net: information leak in AF_KEY notify
981220 - CVE-2013-2237 Kernel: net: af_key: initialize satype in key_notify_policy_flush
981552 - CVE-2013-2232 Kernel: ipv6: using ipv4 vs ipv6 structure during routing lookup in sendmsg
983603 - update RT specfile references of version.h to vermagic.h
987627 - CVE-2013-4162 Kernel: net: panic while pushing pending data out of a IPv6 socket with UDP_CORK enabled
987633 - CVE-2013-4163 Kernel: net: panic while appending data to a corked IPv6 socket in ip6_append_data_mtu


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