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USN-1269-1: Linux kernel (EC2) vulnerabilities

21 November 2011

Several security issues were fixed in the kernel.

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Releases

Packages

Details

Vasily Averin discovered that the NFS Lock Manager (NLM) incorrectly
handled unlock requests. A local attacker could exploit this to cause a
denial of service. (CVE-2011-2491)

Robert Swiecki discovered that mapping extensions were incorrectly handled.
A local attacker could exploit this to crash the system, leading to a
denial of service. (CVE-2011-2496)

It was discovered that the wireless stack incorrectly verified SSID
lengths. A local attacker could exploit this to cause a denial of service
or gain root privileges. (CVE-2011-2517)

Ben Pfaff discovered that Classless Queuing Disciplines (qdiscs) were being
incorrectly handled. A local attacker could exploit this to crash the
system, leading to a denial of service. (CVE-2011-2525)

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Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

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Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 10.04

After a standard system update you need to reboot your computer to make
all the necessary changes.

ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed. If
you use linux-restricted-modules, you have to update that package as
well to get modules which work with the new kernel version. Unless you
manually uninstalled the standard kernel metapackages (e.g. linux-generic,
linux-server, linux-powerpc), a standard system upgrade will automatically
perform this as well.

References

Related notices

  • USN-1241-1: linux-image-2.6.31-611-imx51, linux-fsl-imx51
  • USN-1286-1: linux-image-2.6.32-36-generic-pae, linux-image-2.6.32-36-ia64, linux-image-2.6.32-36-lpia, linux-image-2.6.32-36-preempt, linux-image-2.6.32-36-sparc64, linux-image-2.6.32-36-versatile, linux, linux-image-2.6.32-36-powerpc64-smp, linux-image-2.6.32-36-server, linux-image-2.6.32-36-sparc64-smp, linux-image-2.6.32-36-generic, linux-image-2.6.32-36-powerpc-smp, linux-image-2.6.32-36-virtual, linux-image-2.6.32-36-386, linux-image-2.6.32-36-powerpc
  • USN-1268-1: linux, linux-image-2.6.24-30-virtual, linux-image-2.6.24-30-sparc64, linux-image-2.6.24-30-rt, linux-image-2.6.24-30-sparc64-smp, linux-image-2.6.24-30-server, linux-image-2.6.24-30-generic, linux-image-2.6.24-30-mckinley, linux-image-2.6.24-30-386, linux-image-2.6.24-30-powerpc64-smp, linux-image-2.6.24-30-hppa32, linux-image-2.6.24-30-hppa64, linux-image-2.6.24-30-powerpc-smp, linux-image-2.6.24-30-openvz, linux-image-2.6.24-30-xen, linux-image-2.6.24-30-itanium, linux-image-2.6.24-30-lpiacompat, linux-image-2.6.24-30-lpia, linux-image-2.6.24-30-powerpc
  • USN-1274-1: linux-mvl-dove, linux-image-2.6.32-420-dove
  • USN-1256-1: linux-image-2.6.38-12-virtual, linux-image-2.6.38-12-generic-pae, linux-image-2.6.38-12-generic, linux-lts-backport-natty, linux-image-2.6.38-12-server
  • USN-1272-1: linux-image-2.6.35-31-generic, linux-image-2.6.35-31-virtual, linux, linux-image-2.6.35-31-powerpc64-smp, linux-image-2.6.35-31-generic-pae, linux-image-2.6.35-31-powerpc, linux-image-2.6.35-31-versatile, linux-image-2.6.35-31-server, linux-image-2.6.35-31-powerpc-smp, linux-image-2.6.35-31-omap
  • USN-1281-1: linux-image-2.6.38-1209-omap4, linux-ti-omap4
  • USN-1285-1: linux-image-2.6.38-13-powerpc-smp, linux-image-2.6.38-13-generic-pae, linux-image-2.6.38-13-versatile, linux, linux-image-2.6.38-13-powerpc64-smp, linux-image-2.6.38-13-server, linux-image-2.6.38-13-omap, linux-image-2.6.38-13-virtual, linux-image-2.6.38-13-generic, linux-image-2.6.38-13-powerpc
  • USN-1279-1: linux-image-2.6.38-13-generic-pae, linux-image-2.6.38-13-server, linux-lts-backport-natty, linux-image-2.6.38-13-virtual, linux-image-2.6.38-13-generic
  • USN-1278-1: linux-lts-backport-maverick, linux-image-2.6.35-31-generic, linux-image-2.6.35-31-virtual, linux-image-2.6.35-31-generic-pae, linux-image-2.6.35-31-server
  • USN-1244-1: linux-image-2.6.35-903-omap4, linux-ti-omap4
  • USN-1271-1: linux-image-2.6.31-612-imx51, linux-fsl-imx51
  • USN-1280-1: linux-image-2.6.35-903-omap4, linux-ti-omap4
  • USN-1167-1: linux-image-2.6.38-10-powerpc64-smp, linux-image-2.6.38-10-powerpc, linux-image-2.6.38-10-omap, linux-image-2.6.38-10-versatile, linux-image-2.6.38-10-virtual, linux, linux-image-2.6.38-10-generic-pae, linux-image-2.6.38-10-generic, linux-image-2.6.38-10-server, linux-image-2.6.38-10-powerpc-smp

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