USN-1900-1: Linux kernel (EC2) vulnerabilities

04 July 2013

Several security issues were fixed in the kernel.

Releases

Packages

  • linux-ec2 - Linux kernel for EC2

Details

Dmitry Monakhov reported a race condition flaw the Linux ext4 filesystem
that can expose stale data. An unprivileged user could exploit this flaw to
cause an information leak. (CVE-2012-4508)

Dave Jones discovered that the Linux kernel's socket subsystem does not
correctly ensure the keepalive action is associated with a stream socket. A
local user could exploit this flaw to cause a denial of service (system
crash) by creating a raw socket. (CVE-2012-6657)

An information leak was discovered in the Linux kernel's tkill and tgkill
system calls when used from compat processes. A local user could exploit
this flaw to examine potentially sensitive kernel memory. (CVE-2013-2141)

Kees Cook discovered a format string vulnerability in the Broadcom B43
wireless driver for the Linux kernel. A local user could exploit this flaw
to gain administrative privileges. (CVE-2013-2852)

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.

Related notices

  • USN-1720-1: linux-image-3.0.0-31-virtual, linux-image-3.0.0-31-generic-pae, linux-image-3.0.0-31-powerpc-smp, linux-image-3.0.0-31-powerpc64-smp, linux-image-3.0.0-31-generic, linux-image-3.0.0-31-omap, linux-image-3.0.0-31-powerpc, linux, linux-image-3.0.0-31-server
  • USN-1881-1: linux-image-3.5.0-34-omap, linux-image-3.5.0-34-powerpc-smp, linux-image-3.5.0-34-generic, linux-image-3.5.0-34-powerpc64-smp, linux, linux-image-3.5.0-34-highbank
  • USN-1645-1: linux-image-3.2.0-1422-omap4, linux-ti-omap4
  • USN-1671-1: linux-image-3.5.0-21-highbank, linux-image-3.5.0-21-generic, linux-image-3.5.0-21-powerpc-smp, linux-image-3.5.0-21-omap, linux, linux-image-3.5.0-21-powerpc64-smp
  • USN-1919-1: linux, linux-image-3.8.0-27-generic
  • USN-1883-1: linux-image-3.5.0-226-omap4, linux-ti-omap4
  • USN-1899-1: linux-image-2.6.32-49-powerpc-smp, linux-image-2.6.32-49-sparc64-smp, linux-image-2.6.32-49-preempt, linux-image-2.6.32-49-server, linux-image-2.6.32-49-powerpc, linux-image-2.6.32-49-generic, linux-image-2.6.32-49-ia64, linux-image-2.6.32-49-generic-pae, linux-image-2.6.32-49-lpia, linux-image-2.6.32-49-386, linux-image-2.6.32-49-versatile, linux-image-2.6.32-49-sparc64, linux-image-2.6.32-49-virtual, linux, linux-image-2.6.32-49-powerpc64-smp
  • USN-1719-1: linux-image-3.0.0-31-virtual, linux-image-3.0.0-31-generic-pae, linux-image-3.0.0-31-generic, linux-lts-backport-oneiric, linux-image-3.0.0-31-server
  • USN-1930-1: linux-ti-omap4, linux-image-3.2.0-1436-omap4
  • USN-1837-1: linux-image-3.8.0-22-generic, linux
  • USN-1917-1: linux-image-3.5.0-37-highbank, linux-image-3.5.0-37-powerpc64-smp, linux-image-3.5.0-37-powerpc-smp, linux, linux-image-3.5.0-37-omap, linux-image-3.5.0-37-generic
  • USN-1918-1: linux-ti-omap4, linux-image-3.5.0-229-omap4
  • USN-1673-1: linux-image-3.5.0-216-omap4, linux-ti-omap4
  • USN-1704-1: linux-image-3.5.0-22-generic, linux-lts-quantal
  • USN-1936-1: linux-lts-raring, linux-image-3.8.0-29-generic
  • USN-1849-1: linux-image-3.8.0-23-generic, linux-lts-raring
  • USN-1644-1: linux-image-3.2.0-34-generic-pae, linux-image-3.2.0-34-virtual, linux-image-3.2.0-34-generic, linux-image-3.2.0-34-omap, linux-image-3.2.0-34-powerpc64-smp, linux, linux-image-3.2.0-34-powerpc-smp, linux-image-3.2.0-34-highbank
  • USN-1833-1: linux-image-3.2.0-44-virtual, linux-image-3.2.0-44-powerpc-smp, linux-image-3.2.0-44-highbank, linux-image-3.2.0-44-powerpc64-smp, linux-image-3.2.0-44-omap, linux-image-3.2.0-44-generic, linux, linux-image-3.2.0-44-generic-pae
  • USN-1880-1: linux-lts-quantal, linux-image-3.5.0-34-generic
  • USN-1726-1: linux-image-3.0.0-1221-omap4, linux-ti-omap4
  • USN-1915-1: linux-lts-quantal, linux-image-3.5.0-37-generic
  • USN-1839-1: linux-image-3.2.0-1432-omap4, linux-ti-omap4
  • USN-1920-1: linux-ti-omap4, linux-image-3.5.0-229-omap4
  • USN-1914-1: linux-image-3.2.0-51-highbank, linux-image-3.2.0-51-generic-pae, linux-image-3.2.0-51-powerpc64-smp, linux-image-3.2.0-51-omap, linux, linux-image-3.2.0-51-virtual, linux-image-3.2.0-51-generic, linux-image-3.2.0-51-powerpc-smp
  • USN-1882-1: linux-image-3.5.0-226-omap4, linux-ti-omap4