Issued:
2012-09-19
Updated:
2012-09-19

RHSA-2012:1282 - Security Advisory

Synopsis

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

Type/Severity

Security Advisory: Moderate

Topic

Updated kernel-rt packages that fix one security issue, several bugs, and
add enhancements are now available for Red Hat Enterprise MRG 2.2.

The Red Hat Security Response Team has rated this update as having moderate
security impact. A Common Vulnerability Scoring System (CVSS) base score,
which gives a detailed severity rating, is available from the CVE link in
the References section.

Description

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

This update fixes the following security issue:

  • It was found that a deadlock could occur in the Out of Memory (OOM)
    killer. A process could trigger this deadlock by consuming a large amount
    of memory, and then causing request_module() to be called. A local,
    unprivileged user could use this flaw to cause a denial of service
    (excessive memory consumption). (CVE-2012-4398, Moderate)

Red Hat would like to thank Tetsuo Handa for reporting this issue.

The kernel-rt packages have been upgraded to upstream version 3.2, which
provides a number of bug fixes and enhancements over the previous version.
(BZ#798421)

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

Users should upgrade to these updated kernel-rt packages, which correct
this issue, fix these bugs, and add these enhancements. 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/knowledge/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 - 725799 - diskless support for MRG 2.x
  • BZ - 786083 - iptables unable to log to rsyslog
  • BZ - 798421 - Rebase MRG RT kernel to 3.2-rtX series
  • BZ - 798423 - InfiniBand stack refresh in MRG RT
  • BZ - 799385 - Thread can dead lock in migrate timers
  • BZ - 799386 - The futex proxy handler grabs the pi_lock without disabling interrupts
  • BZ - 799389 - lglocks can be taken and never released on cpu offline and onlining
  • BZ - 799391 - Tasks waiting on a state change of another task may get wrong result
  • BZ - 799399 - ftrace_dump() can cause issues on RT
  • BZ - 814689 - missing /proc/sys/crypto/fips_enabled in 3.2.14-rt24.22.el6rt.x86_64 causes openssh errors
  • BZ - 815937 - 3.0.25-rt44.57.el6rt.x86_64 missing firmware rtl_nic/rtl8168e-2.fw
  • BZ - 825344 - new mrg-rt-release sub-package [mrg2.2]
  • BZ - 834583 - kernel-rt-3.2.20-rt32.44.el6rt.x86_64 floods the console with "DMAR [fault reason 02] Present bit in context entry is clear"
  • BZ - 842680 - kernel 3.2.23-rt37.49.el6rt.x86_64 doesn't create symlinks to /lib/firmware/mrg-rt-firmware
  • BZ - 853474 - CVE-2012-4398 kernel: request_module() OOM local DoS

CVEs

References

MRG Realtime 2

SRPM
kernel-rt-3.2.23-rt37.56.el6rt.src.rpm SHA-256: 6267e5f0960b59d7802dca8233b34a3c3aa867178f6d4fec6745c5db8b2ed08d
rt-firmware-1.0-3.el6_3.src.rpm SHA-256: 1aab03ac36c7b80236893a20af050ac543962a2d601b156a7c1f6af6a65e6433
x86_64
kernel-rt-3.2.23-rt37.56.el6rt.x86_64.rpm SHA-256: 6b3773a57b7870e0f7fadc2dcb1f68f797ca645fa62d8309c493d1320434d1a3
kernel-rt-debug-3.2.23-rt37.56.el6rt.x86_64.rpm SHA-256: d58d7c85278512c2cbc9deb262a0ad7de2bdf2eac98c268eac2d75e51da8352c
kernel-rt-debug-debuginfo-3.2.23-rt37.56.el6rt.x86_64.rpm SHA-256: 706b2e63b7afaba29358cfe2d87cf58388299676c7de01e81adf3a88bc7f1b04
kernel-rt-debug-devel-3.2.23-rt37.56.el6rt.x86_64.rpm SHA-256: 8343de646f3cc8291dc13fc0ad7a712d449e853ca28ee99400896124954e89ac
kernel-rt-debuginfo-3.2.23-rt37.56.el6rt.x86_64.rpm SHA-256: 339f3440ce59b191f8f03f11d8e3a4cd0056243eea273b5063606ab9bbcaca08
kernel-rt-debuginfo-common-x86_64-3.2.23-rt37.56.el6rt.x86_64.rpm SHA-256: b754938d08bf9f9171c9f5b074c07ca85fd4f354855a9f4c617d0c1dec013f72
kernel-rt-devel-3.2.23-rt37.56.el6rt.x86_64.rpm SHA-256: 1bb388abb24de528c79c3fe32a5ca25fe8a67841454c46065cf53d4147a580ef
kernel-rt-doc-3.2.23-rt37.56.el6rt.noarch.rpm SHA-256: 0d20448d7a22c4a244d16e00bc8a3ed0625db3f35452494e594f0e6c0376f008
kernel-rt-firmware-3.2.23-rt37.56.el6rt.noarch.rpm SHA-256: 6e5ba5de3f2c5e239f35a33d01c583a38c8a9ad9cc602f7c886baf3469cffecb
kernel-rt-trace-3.2.23-rt37.56.el6rt.x86_64.rpm SHA-256: 6b903bed9ce68df7b73e2e9a9f67ee359eb5220521bef4d26f4d094d5da4984d
kernel-rt-trace-debuginfo-3.2.23-rt37.56.el6rt.x86_64.rpm SHA-256: 2e81e48fd4788c63aadea68cabb7fcc78e749e5bd2ea148fbbd33c5a1b2e1a00
kernel-rt-trace-devel-3.2.23-rt37.56.el6rt.x86_64.rpm SHA-256: 520e37ea6738d093a9309dd4af35e33d247f9e1ebd7a87408f20b827572c7ad8
kernel-rt-vanilla-3.2.23-rt37.56.el6rt.x86_64.rpm SHA-256: 70ff29a067c85ecdf173dc6b9476f5590977c2ab7cacc6dc31c732e0881128b5
kernel-rt-vanilla-debuginfo-3.2.23-rt37.56.el6rt.x86_64.rpm SHA-256: 70e1c5153fa35545dd93be7b41f7796339b2b806098c05be5a4722f8a5b35dd9
kernel-rt-vanilla-devel-3.2.23-rt37.56.el6rt.x86_64.rpm SHA-256: 7d5f09f2449d7fbe448c76ae139310e402495f47589ba9274a24aad9f33a8b3a
mrg-rt-release-3.2.23-rt37.56.el6rt.noarch.rpm SHA-256: 59db686fa8c38be187415463287d45e6b0fbfc0fb33b13418c4abfee71a61e4e
rt-firmware-1.0-3.el6_3.noarch.rpm SHA-256: 0ff05324ad27bd58b926f3ddff144ef77a7b8af0c0738c9ec992ff70f5c7dc34

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