Issued:
2011-02-22
Updated:
2011-02-22

RHSA-2011:0283 - Moderate: kernel security, bug fix, and enhancement update

Synopsis

Moderate: kernel security, bug fix, and enhancement update

Type/Severity

Security Advisory Moderate

Topic

Updated kernel packages that fix three security issues, several bugs, and add two enhancements are now available for Red Hat Enterprise Linux 6.

The Red Hat Security Response Team has rated this update as having moderate 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 packages contain the Linux kernel, the core of any Linux operating system.

This update fixes the following security issues:

  • A divide-by-zero flaw was found in the tcp_select_initial_window() function in the Linux kernel's TCP/IP protocol suite implementation. A local, unprivileged user could use this flaw to trigger a denial of service by calling setsockopt() with certain options. (CVE-2010-4165, Moderate)

  • A use-after-free flaw in the mprotect() system call in the Linux kernel could allow a local, unprivileged user to cause a local denial of service. (CVE-2010-4169, Moderate)

  • A flaw was found in the Linux kernel execve() system call implementation. A local, unprivileged user could cause large amounts of memory to be allocated but not visible to the OOM (Out of Memory) killer, triggering a denial of service. (CVE-2010-4243, Moderate)

Red Hat would like to thank Steve Chen for reporting CVE-2010-4165, and Brad Spengler for reporting CVE-2010-4243.

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

Users should upgrade to these updated packages, which contain backported patches to correct these issues, and fix the bugs and add the enhancements noted in the 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 This content is not included.https://access.redhat.com/kb/docs/DOC-11259

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

ProductVersionArch
Red Hat Enterprise Linux for Scientific Computing6x86_64
Red Hat Enterprise Linux for Power, big endian6ppc64
Red Hat Enterprise Linux for IBM z Systems6s390x
Red Hat Enterprise Linux Workstation6x86_64
Red Hat Enterprise Linux Workstation6i386
Red Hat Enterprise Linux Server6x86_64
Red Hat Enterprise Linux Server6i386
Red Hat Enterprise Linux Server from RHUI6x86_64
Red Hat Enterprise Linux Server from RHUI6i386
Red Hat Enterprise Linux Server - Extended Life Cycle Support6x86_64
Red Hat Enterprise Linux Server - Extended Life Cycle Support6i386
Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension6x86_64
Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension6i386
Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension (for IBM z Systems)6s390x
Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems)6s390x
Red Hat Enterprise Linux Desktop6x86_64
Red Hat Enterprise Linux Desktop6i386

Updated Packages

  • kernel-2.6.32-71.18.1.el6.ppc64.rpm
  • kernel-debuginfo-common-i686-2.6.32-71.18.1.el6.i686.rpm
  • kernel-debuginfo-2.6.32-71.18.1.el6.x86_64.rpm
  • kernel-firmware-2.6.32-71.18.1.el6.noarch.rpm
  • kernel-debug-2.6.32-71.18.1.el6.ppc64.rpm
  • kernel-2.6.32-71.18.1.el6.i686.rpm
  • kernel-debuginfo-common-ppc64-2.6.32-71.18.1.el6.ppc64.rpm
  • kernel-debug-debuginfo-2.6.32-71.18.1.el6.ppc64.rpm
  • kernel-debug-devel-2.6.32-71.18.1.el6.x86_64.rpm
  • kernel-bootwrapper-2.6.32-71.18.1.el6.ppc64.rpm
  • kernel-headers-2.6.32-71.18.1.el6.ppc64.rpm
  • kernel-debuginfo-common-s390x-2.6.32-71.18.1.el6.s390x.rpm
  • kernel-debug-2.6.32-71.18.1.el6.x86_64.rpm
  • kernel-devel-2.6.32-71.18.1.el6.ppc64.rpm
  • kernel-debug-devel-2.6.32-71.18.1.el6.i686.rpm
  • kernel-debuginfo-2.6.32-71.18.1.el6.ppc64.rpm
  • kernel-debug-debuginfo-2.6.32-71.18.1.el6.s390x.rpm
  • kernel-kdump-debuginfo-2.6.32-71.18.1.el6.s390x.rpm
  • kernel-2.6.32-71.18.1.el6.s390x.rpm
  • kernel-devel-2.6.32-71.18.1.el6.s390x.rpm
  • kernel-kdump-2.6.32-71.18.1.el6.s390x.rpm
  • kernel-debug-devel-2.6.32-71.18.1.el6.ppc64.rpm
  • kernel-debuginfo-2.6.32-71.18.1.el6.s390x.rpm
  • kernel-debug-devel-2.6.32-71.18.1.el6.s390x.rpm
  • kernel-debug-debuginfo-2.6.32-71.18.1.el6.i686.rpm
  • kernel-2.6.32-71.18.1.el6.src.rpm
  • perf-2.6.32-71.18.1.el6.noarch.rpm
  • kernel-debug-2.6.32-71.18.1.el6.s390x.rpm
  • kernel-headers-2.6.32-71.18.1.el6.i686.rpm
  • kernel-debug-debuginfo-2.6.32-71.18.1.el6.x86_64.rpm
  • kernel-debuginfo-2.6.32-71.18.1.el6.i686.rpm
  • kernel-headers-2.6.32-71.18.1.el6.s390x.rpm
  • kernel-doc-2.6.32-71.18.1.el6.noarch.rpm
  • kernel-debug-2.6.32-71.18.1.el6.i686.rpm
  • kernel-devel-2.6.32-71.18.1.el6.i686.rpm
  • kernel-debuginfo-common-x86_64-2.6.32-71.18.1.el6.x86_64.rpm
  • kernel-devel-2.6.32-71.18.1.el6.x86_64.rpm
  • kernel-2.6.32-71.18.1.el6.x86_64.rpm
  • kernel-kdump-devel-2.6.32-71.18.1.el6.s390x.rpm
  • kernel-headers-2.6.32-71.18.1.el6.x86_64.rpm

Fixes

CVEs

References

Additional information