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USN-1533-1: Linux kernel vulnerabilities

10 August 2012

Several security issues were fixed in the kernel.

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Releases

Packages

Details

An error was discovered in the Linux kernel's network TUN/TAP device
implementation. A local user with access to the TUN/TAP interface (which is
not available to unprivileged users until granted by a root user) could
exploit this flaw to crash the system or potential gain administrative
privileges. (CVE-2012-2136)

Ulrich Obergfell discovered an error in the Linux kernel's memory
management subsystem on 32 bit PAE systems with more than 4GB of memory
installed. A local unprivileged user could exploit this flaw to crash the
system. (CVE-2012-2373)

An error was discovered in the Linux kernel's memory subsystem (hugetlb).
An unprivileged local user could exploit this flaw to cause a denial of
service (crash the system). (CVE-2012-2390)

A flaw was discovered in the Linux kernel's epoll system call. An
unprivileged local user could use this flaw to crash the system.
(CVE-2012-3375)

Some errors where discovered in the Linux kernel's UDF file system, which
is used to mount some CD-ROMs and DVDs. An unprivileged local user could
use these flaws to crash the system. (CVE-2012-3400)

A flaw was discovered in the madvise feature of the Linux kernel's memory
subsystem. An unprivileged local use could exploit the flaw to cause a
denial of service (crash the system). (CVE-2012-3511)

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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 11.10

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-1531-1: linux, linux-image-2.6.38-15-versatile, linux-image-2.6.38-15-virtual, linux-image-2.6.38-15-omap, linux-image-2.6.38-15-generic-pae, linux-image-2.6.38-15-powerpc64-smp, linux-image-2.6.38-15-powerpc-smp, linux-image-2.6.38-15-server, linux-image-2.6.38-15-generic, linux-image-2.6.38-15-powerpc
  • USN-1539-1: linux-lts-backport-oneiric, linux-image-3.0.0-24-virtual, linux-image-3.0.0-24-server, linux-image-3.0.0-24-generic-pae, linux-image-3.0.0-24-generic
  • USN-1535-1: linux, linux-image-2.6.32-42-ia64, linux-image-2.6.32-42-powerpc-smp, linux-image-2.6.32-42-sparc64, linux-image-2.6.32-42-virtual, linux-image-2.6.32-42-powerpc64-smp, linux-image-2.6.32-42-preempt, linux-image-2.6.32-42-386, linux-image-2.6.32-42-generic, linux-image-2.6.32-42-generic-pae, linux-image-2.6.32-42-lpia, linux-image-2.6.32-42-versatile, linux-image-2.6.32-42-server, linux-image-2.6.32-42-powerpc, linux-image-2.6.32-42-sparc64-smp
  • USN-1529-1: linux, linux-image-3.2.0-29-powerpc64-smp, linux-image-3.2.0-29-generic-pae, linux-image-3.2.0-29-omap, linux-image-3.2.0-29-virtual, linux-image-3.2.0-29-highbank, linux-image-3.2.0-29-powerpc-smp, linux-image-3.2.0-29-generic
  • USN-1534-1: linux-image-2.6.32-347-ec2, linux-ec2
  • USN-1514-1: linux-image-3.2.0-1417-omap4, linux-ti-omap4
  • USN-1598-1: linux-image-2.6.24-32-hppa64, linux-image-2.6.24-32-rt, linux-image-2.6.24-32-sparc64-smp, linux-image-2.6.24-32-openvz, linux-image-2.6.24-32-lpiacompat, linux-image-2.6.24-32-itanium, linux-image-2.6.24-32-powerpc, linux-image-2.6.24-32-virtual, linux, linux-image-2.6.24-32-sparc64, linux-image-2.6.24-32-mckinley, linux-image-2.6.24-32-powerpc64-smp, linux-image-2.6.24-32-lpia, linux-image-2.6.24-32-server, linux-image-2.6.24-32-xen, linux-image-2.6.24-32-powerpc-smp, linux-image-2.6.24-32-hppa32, linux-image-2.6.24-32-generic, linux-image-2.6.24-32-386
  • USN-1532-1: linux-image-3.0.0-1214-omap4, linux-ti-omap4
  • USN-1538-1: linux-image-2.6.38-15-virtual, linux-image-2.6.38-15-generic-pae, linux-lts-backport-natty, linux-image-2.6.38-15-server, linux-image-2.6.38-15-generic
  • USN-1530-1: linux-image-2.6.38-1209-omap4, linux-ti-omap4
  • USN-1515-1: linux, linux-image-3.2.0-27-powerpc-smp, linux-image-3.2.0-27-virtual, linux-image-3.2.0-27-generic, linux-image-3.2.0-27-powerpc64-smp, linux-image-3.2.0-27-highbank, linux-image-3.2.0-27-generic-pae, linux-image-3.2.0-27-omap
  • USN-1508-1: linux-image-3.2.0-1416-omap4, linux-ti-omap4
  • USN-1562-1: linux-image-2.6.38-15-virtual, linux-image-2.6.38-15-generic-pae, linux-lts-backport-natty, linux-image-2.6.38-15-server, linux-image-2.6.38-15-generic
  • USN-1556-1: linux-image-2.6.32-347-ec2, linux-ec2
  • USN-1557-1: linux, linux-image-2.6.38-15-versatile, linux-image-2.6.38-15-virtual, linux-image-2.6.38-15-omap, linux-image-2.6.38-15-generic-pae, linux-image-2.6.38-15-powerpc64-smp, linux-image-2.6.38-15-powerpc-smp, linux-image-2.6.38-15-server, linux-image-2.6.38-15-generic, linux-image-2.6.38-15-powerpc
  • USN-1555-1: linux, linux-image-2.6.32-42-ia64, linux-image-2.6.32-42-powerpc-smp, linux-image-2.6.32-42-sparc64, linux-image-2.6.32-42-virtual, linux-image-2.6.32-42-powerpc64-smp, linux-image-2.6.32-42-preempt, linux-image-2.6.32-42-386, linux-image-2.6.32-42-generic, linux-image-2.6.32-42-generic-pae, linux-image-2.6.32-42-lpia, linux-image-2.6.32-42-versatile, linux-image-2.6.32-42-server, linux-image-2.6.32-42-powerpc, linux-image-2.6.32-42-sparc64-smp
  • USN-1574-1: linux-image-2.6.38-16-generic-pae, linux-image-2.6.38-16-server, linux-lts-backport-natty, linux-image-2.6.38-16-generic, linux-image-2.6.38-16-virtual
  • USN-1572-1: linux, linux-image-2.6.32-43-lpia, linux-image-2.6.32-43-powerpc, linux-image-2.6.32-43-generic, linux-image-2.6.32-43-generic-pae, linux-image-2.6.32-43-sparc64-smp, linux-image-2.6.32-43-server, linux-image-2.6.32-43-preempt, linux-image-2.6.32-43-sparc64, linux-image-2.6.32-43-virtual, linux-image-2.6.32-43-ia64, linux-image-2.6.32-43-versatile, linux-image-2.6.32-43-386, linux-image-2.6.32-43-powerpc64-smp, linux-image-2.6.32-43-powerpc-smp
  • USN-1577-1: linux-image-2.6.38-1209-omap4, linux-ti-omap4
  • USN-1573-1: linux-image-2.6.32-348-ec2, linux-ec2
  • USN-1567-1: linux, linux-image-2.6.38-16-omap, linux-image-2.6.38-16-powerpc, linux-image-2.6.38-16-generic-pae, linux-image-2.6.38-16-powerpc-smp, linux-image-2.6.38-16-server, linux-image-2.6.38-16-powerpc64-smp, linux-image-2.6.38-16-generic, linux-image-2.6.38-16-versatile, linux-image-2.6.38-16-virtual

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