Issued:
2011-04-12
Updated:
2011-04-12

RHSA-2011:0429 - Important: kernel security and bug fix update

Synopsis

Important: kernel security and bug fix update

Type/Severity

Security Advisory Important

Topic

Updated kernel packages that fix multiple security issues and several bugs are now available for Red Hat Enterprise Linux 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 packages contain the Linux kernel, the core of any Linux operating system.

This update fixes the following security issues:

  • A missing boundary check was found in the dvb_ca_ioctl() function in the Linux kernel's av7110 module. On systems that use old DVB cards that require the av7110 module, a local, unprivileged user could use this flaw to cause a denial of service or escalate their privileges. (CVE-2011-0521, Important)

  • An inconsistency was found in the interaction between the Linux kernel's method for allocating NFSv4 (Network File System version 4) ACL data and the method by which it was freed. This inconsistency led to a kernel panic which could be triggered by a local, unprivileged user with files owned by said user on an NFSv4 share. (CVE-2011-1090, Moderate)

  • A NULL pointer dereference flaw was found in the Generic Receive Offload (GRO) functionality in the Linux kernel's networking implementation. If both GRO and promiscuous mode were enabled on an interface in a virtual LAN (VLAN), it could result in a denial of service when a malformed VLAN frame is received on that interface. (CVE-2011-1478, Moderate)

  • A missing security check in the Linux kernel's implementation of the install_special_mapping() function could allow a local, unprivileged user to bypass the mmap_min_addr protection mechanism. (CVE-2010-4346, Low)

  • An information leak was found in the Linux kernel's task_show_regs() implementation. On IBM S/390 systems, a local, unprivileged user could use this flaw to read /proc/[PID]/status files, allowing them to discover the CPU register values of processes. (CVE-2011-0710, Low)

  • A missing validation check was found in the Linux kernel's mac_partition() implementation, used for supporting file systems created on Mac OS operating systems. A local attacker could use this flaw to cause a denial of service by mounting a disk that contains specially-crafted partitions. (CVE-2011-1010, Low)

Red Hat would like to thank Ryan Sweat for reporting CVE-2011-1478; Tavis Ormandy for reporting CVE-2010-4346; and Timo Warns for reporting CVE-2011-1010.

This update also fixes several bugs. Documentation for these bug fixes 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 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 x86_64 - Extended Update Support5.6x86_64
Red Hat Enterprise Linux for x86_64 - Extended Update Support5.6ia64
Red Hat Enterprise Linux for x86_64 - Extended Update Support5.6i386
Red Hat Enterprise Linux for Power, big endian5ppc
Red Hat Enterprise Linux for Power, big endian - Extended Update Support5.6ppc
Red Hat Enterprise Linux for IBM z Systems5s390x
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support5.6s390x
Red Hat Enterprise Linux Workstation5x86_64
Red Hat Enterprise Linux Workstation5i386
Red Hat Enterprise Linux Server5x86_64
Red Hat Enterprise Linux Server5ia64
Red Hat Enterprise Linux Server5i386
Red Hat Enterprise Linux Server from RHUI5x86_64
Red Hat Enterprise Linux Server from RHUI5i386
Red Hat Enterprise Linux Server - Extended Update Support from RHUI5.6x86_64
Red Hat Enterprise Linux Server - Extended Update Support from RHUI5.6i386
Red Hat Enterprise Linux Server - AUS5.6x86_64
Red Hat Enterprise Linux Server - AUS5.6ia64
Red Hat Enterprise Linux Server - AUS5.6i386
Red Hat Enterprise Linux Desktop5x86_64
Red Hat Enterprise Linux Desktop5i386

Updated Packages

  • kernel-2.6.18-238.9.1.el5.ia64.rpm
  • kernel-debug-2.6.18-238.9.1.el5.ia64.rpm
  • kernel-kdump-2.6.18-238.9.1.el5.ppc64.rpm
  • kernel-2.6.18-238.9.1.el5.src.rpm
  • kernel-headers-2.6.18-238.9.1.el5.ia64.rpm
  • kernel-debug-2.6.18-238.9.1.el5.i686.rpm
  • kernel-debug-devel-2.6.18-238.9.1.el5.x86_64.rpm
  • kernel-debug-2.6.18-238.9.1.el5.ppc64.rpm
  • kernel-devel-2.6.18-238.9.1.el5.ia64.rpm
  • kernel-debug-devel-2.6.18-238.9.1.el5.s390x.rpm
  • kernel-xen-devel-2.6.18-238.9.1.el5.ia64.rpm
  • kernel-2.6.18-238.9.1.el5.s390x.rpm
  • kernel-kdump-devel-2.6.18-238.9.1.el5.s390x.rpm
  • kernel-xen-devel-2.6.18-238.9.1.el5.x86_64.rpm
  • kernel-2.6.18-238.9.1.el5.i686.rpm
  • kernel-debug-devel-2.6.18-238.9.1.el5.i686.rpm
  • kernel-doc-2.6.18-238.9.1.el5.noarch.rpm
  • kernel-devel-2.6.18-238.9.1.el5.i686.rpm
  • kernel-xen-2.6.18-238.9.1.el5.i686.rpm
  • kernel-debug-devel-2.6.18-238.9.1.el5.ppc64.rpm
  • kernel-headers-2.6.18-238.9.1.el5.i386.rpm
  • kernel-xen-2.6.18-238.9.1.el5.x86_64.rpm
  • kernel-2.6.18-238.9.1.el5.ppc64.rpm
  • kernel-headers-2.6.18-238.9.1.el5.ppc64.rpm
  • kernel-xen-devel-2.6.18-238.9.1.el5.i686.rpm
  • kernel-headers-2.6.18-238.9.1.el5.x86_64.rpm
  • kernel-debug-2.6.18-238.9.1.el5.s390x.rpm
  • kernel-headers-2.6.18-238.9.1.el5.ppc.rpm
  • kernel-debug-2.6.18-238.9.1.el5.x86_64.rpm
  • kernel-headers-2.6.18-238.9.1.el5.s390x.rpm
  • kernel-xen-2.6.18-238.9.1.el5.ia64.rpm
  • kernel-devel-2.6.18-238.9.1.el5.s390x.rpm
  • kernel-kdump-2.6.18-238.9.1.el5.s390x.rpm
  • kernel-debug-devel-2.6.18-238.9.1.el5.ia64.rpm
  • kernel-devel-2.6.18-238.9.1.el5.x86_64.rpm
  • kernel-PAE-2.6.18-238.9.1.el5.i686.rpm
  • kernel-PAE-devel-2.6.18-238.9.1.el5.i686.rpm
  • kernel-2.6.18-238.9.1.el5.x86_64.rpm
  • kernel-kdump-devel-2.6.18-238.9.1.el5.ppc64.rpm
  • kernel-devel-2.6.18-238.9.1.el5.ppc64.rpm

Fixes

CVEs

References

Additional information