Issued:
2014-04-28
Updated:
2014-04-28

RHSA-2014:0439 - Security Advisory

Synopsis

Important: kernel-rt security, bug fix, and enhancement update

Type/Severity

Security Advisory: Important

Topic

Updated kernel-rt packages that fix multiple security issues, several bugs,
and add various enhancements are now available for Red Hat Enterprise MRG
2.5.

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 denial of service flaw was found in the way the Linux kernel's IPv6
    implementation processed IPv6 router advertisement (RA) packets.
    An attacker able to send a large number of RA packets to a target system
    could potentially use this flaw to crash the target system. (CVE-2014-2309,
    Important)
  • A flaw was found in the way the Linux kernel's netfilter connection
    tracking implementation for Datagram Congestion Control Protocol (DCCP)
    packets used the skb_header_pointer() function. A remote attacker could use
    this flaw to send a specially crafted DCCP packet to crash the system or,
    potentially, escalate their privileges on the system. (CVE-2014-2523,
    Important)
  • A flaw was found in the way the Linux kernel's CIFS implementation
    handled uncached write operations with specially crafted iovec structures.
    An unprivileged local user with access to a CIFS share could use this flaw
    to crash the system, leak kernel memory, or, potentially, escalate their
    privileges on the system. (CVE-2014-0069, Moderate)
  • A flaw was found in the way the Linux kernel handled pending Floating
    Pointer Unit (FPU) exceptions during the switching of tasks. A local
    attacker could use this flaw to terminate arbitrary processes on the
    system, causing a denial of service, or, potentially, escalate their
    privileges on the system. Note that this flaw only affected systems using
    AMD CPUs on both 32-bit and 64-bit architectures. (CVE-2014-1438, Moderate)
  • It was found that certain protocol handlers in the Linux kernel's
    networking implementation could set the addr_len value without initializing
    the associated data structure. A local, unprivileged user could use this
    flaw to leak kernel stack memory to user space using the recvmsg, recvfrom,
    and recvmmsg system calls. (CVE-2013-7263, CVE-2013-7265, Low)
  • An information leak flaw was found in the Linux kernel's netfilter
    connection tracking IRC NAT helper implementation that could allow a remote
    attacker to disclose portions of kernel stack memory during IRC DCC (Direct
    Client-to-Client) communication over NAT. (CVE-2014-1690, Low)
  • A denial of service flaw was discovered in the way the Linux kernel's
    SELinux implementation handled files with an empty SELinux security
    context. A local user who has the CAP_MAC_ADMIN capability could use this
    flaw to crash the system. (CVE-2014-1874, Low)

Red Hat would like to thank Al Viro for reporting CVE-2014-0069.
The CVE-2014-1690 issue was discovered by Daniel Borkmann of Red Hat.

This update also fixes several bugs and adds multiple enhancements.
Documentation for these changes will be available shortly from the
Technical Notes document linked to in the References section.

Users are advised to upgrade to these updated packages, which upgrade the
kernel-rt kernel to version kernel-rt-3.10.33-rt32.33, correct these
issues, and fix the bugs and add the enhancements noted in the Red Hat
Enterprise MRG 2 Technical Notes. 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 - 1016735 - Apply IB performance patches to 3.10 realtime kernel
  • BZ - 1032245 - RFE: rebase to a 3.10 kernel
  • BZ - 1035875 - CVE-2013-7263 CVE-2013-7265 Kernel: net: leakage of uninitialized memory to user-space via recv syscalls
  • BZ - 1052914 - CVE-2014-1438 kernel: x86: exceptions are not cleared in AMD FXSAVE workaround
  • BZ - 1058748 - CVE-2014-1690 Kernel: netfilter: nf_nat: leakage of uninitialized buffer in IRC NAT helper
  • BZ - 1058848 - Panic on unload of sit module unload and reading of /proc/<pid>/net/dev
  • BZ - 1062356 - CVE-2014-1874 Kernel: SELinux: local denial-of-service
  • BZ - 1064253 - CVE-2014-0069 kernel: cifs: incorrect handling of bogus user pointers during uncached writes
  • BZ - 1067880 - hpsa driver version regression in MRG 2.5 kernel
  • BZ - 1074471 - CVE-2014-2309 Kernel: net: IPv6: crash due to router advertisement flooding
  • BZ - 1077343 - CVE-2014-2523 kernel: netfilter: nf_conntrack_dccp: incorrect skb_header_pointer API usages

CVEs

References

MRG Realtime 2

SRPM
kernel-rt-3.10.33-rt32.33.el6rt.src.rpm SHA-256: 92eb7bc9a553f76b16f10f77e3d5c2a4d33d41a28ad886fd09a9b6ae571dc16d
x86_64
kernel-rt-3.10.33-rt32.33.el6rt.x86_64.rpm SHA-256: a895e13626655318dc0b0f87ad57014869721045c1c022cf898e9d3c1e58f450
kernel-rt-debug-3.10.33-rt32.33.el6rt.x86_64.rpm SHA-256: 3af360197d7294924f7d5c5da94fb0236a2c0d666cec01669a2d0a427a6135c8
kernel-rt-debug-debuginfo-3.10.33-rt32.33.el6rt.x86_64.rpm SHA-256: 44126eb8a5be6e46e0a7f45db20f98532bc628dcb6fad8abe1c316b0f812a600
kernel-rt-debug-devel-3.10.33-rt32.33.el6rt.x86_64.rpm SHA-256: 01c1a28e8f05951d629589693e71de63dd023f705d1e412d1b0d7a7ec52f71cd
kernel-rt-debuginfo-3.10.33-rt32.33.el6rt.x86_64.rpm SHA-256: 5b6279e8c67f19afd9723e3742e18810e24c77e3a3339d263cddf819513762ff
kernel-rt-debuginfo-common-x86_64-3.10.33-rt32.33.el6rt.x86_64.rpm SHA-256: 65b8d7da919e5f0d422039b17acdaf382a767a22cb2f02da17c4a25e23358835
kernel-rt-devel-3.10.33-rt32.33.el6rt.x86_64.rpm SHA-256: 0b97caf332580a56d8f319bcccb159fcbaee070a1b6ec085a113887d5f99cd4a
kernel-rt-doc-3.10.33-rt32.33.el6rt.noarch.rpm SHA-256: e35826cd656e5ec73d9ceafa2f150881c96c929833fae90c8dd161ccbd61bc0b
kernel-rt-firmware-3.10.33-rt32.33.el6rt.noarch.rpm SHA-256: 48a7d0f2cdd33f70f6e5005cfe193f51261a68d668a60fdbf1e6c33159ad5af2
kernel-rt-trace-3.10.33-rt32.33.el6rt.x86_64.rpm SHA-256: b67b683232995fe9040c3e54912d895d1d2124f47a329d6a41897b490f8e4648
kernel-rt-trace-debuginfo-3.10.33-rt32.33.el6rt.x86_64.rpm SHA-256: 87889cd358a2f81adafb2f104503662de5fad86b51d916642cf84341c876a6bf
kernel-rt-trace-devel-3.10.33-rt32.33.el6rt.x86_64.rpm SHA-256: 302dfac08e1cb547ef5123e06a05fd00f2495f8432eaa3026f452247544b7b9c
kernel-rt-vanilla-3.10.33-rt32.33.el6rt.x86_64.rpm SHA-256: 976ea008e08195114187cbbeafd395228d881245f4e953b813be1aeb0482d525
kernel-rt-vanilla-debuginfo-3.10.33-rt32.33.el6rt.x86_64.rpm SHA-256: e9d0bb867c3d6679ee226b0be022cc8731d0f0b787e84745c5525810305a53a0
kernel-rt-vanilla-devel-3.10.33-rt32.33.el6rt.x86_64.rpm SHA-256: 952ab42cbbb2b85a10ae8152279baabca09b92d025885533174853e9fe06fb07

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