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USN-1645-1: Linux kernel (OMAP4) vulnerabilities

30 November 2012

Several security issues were fixed in the kernel.

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Releases

Packages

Details

Brad Spengler discovered a flaw in the Linux kernel's uname system call. An
unprivileged user could exploit this flaw to read kernel stack memory.
(CVE-2012-0957)

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)

Rodrigo Freire discovered a flaw in the Linux kernel's TCP illinois
congestion control algorithm. A local attacker could use this to cause a
denial of service. (CVE-2012-4565)

Mathias Krause discovered a flaw in the Linux kernel's XFRM netlink
interface. A local user with the NET_ADMIN capability could exploit this
flaw to leak the contents of kernel memory. (CVE-2012-6536)

Mathias Krause discovered several errors in the Linux kernel's xfrm_user
implementation. A local attacker could exploit these flaws to examine parts
of kernel memory. (CVE-2012-6537)

Mathias Krause discovered an information leak in the Linux kernel's
xfrm_user copy_to_user_auth function. A local user could exploit this flaw
to examine parts of kernel heap memory. (CVE-2012-6538)

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)

A flaw was discovered in the Linux kernels handling of memory ranges with
PROT_NONE when transparent hugepages are in use. An unprivileged local user
could exploit this flaw to cause a denial of service (crash the system).
(CVE-2013-0309)

Mathias Krause discovered a flaw in xfrm_user in the Linux kernel. A local
attacker with NET_ADMIN capability could potentially exploit this flaw to
escalate privileges. (CVE-2013-1826)

An information leak was discovered in the Linux kernel's /dev/dvb device. A
local user could exploit this flaw to obtain sensitive information from the
kernel's stack memory. (CVE-2013-1928)

Reduce your security exposure

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.

Learn more about Ubuntu Pro

Update instructions

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

Ubuntu 12.04

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-1648-1: linux-image-3.0.0-28-server, linux, linux-image-3.0.0-28-powerpc-smp, linux-image-3.0.0-28-virtual, linux-image-3.0.0-28-generic-pae, linux-image-3.0.0-28-powerpc, linux-image-3.0.0-28-powerpc64-smp, linux-image-3.0.0-28-omap, linux-image-3.0.0-28-generic
  • USN-1644-1: linux, linux-image-3.2.0-34-virtual, linux-image-3.2.0-34-generic, linux-image-3.2.0-34-powerpc64-smp, linux-image-3.2.0-34-highbank, linux-image-3.2.0-34-powerpc-smp, linux-image-3.2.0-34-generic-pae, linux-image-3.2.0-34-omap
  • USN-1649-1: linux-image-3.0.0-1218-omap4, linux-ti-omap4
  • USN-1704-1: linux-lts-quantal, linux-image-3.5.0-22-generic
  • USN-1646-1: linux-image-3.5.0-19-powerpc-smp, linux, linux-image-3.5.0-19-generic, linux-image-3.5.0-19-omap, linux-image-3.5.0-19-highbank, linux-image-3.5.0-19-powerpc64-smp
  • USN-1647-1: linux-image-3.5.0-215-omap4, linux-ti-omap4
  • USN-1652-1: linux-image-3.0.0-28-server, linux-image-3.0.0-28-virtual, linux-image-3.0.0-28-generic-pae, linux-lts-backport-oneiric, linux-image-3.0.0-28-generic
  • USN-1719-1: linux-image-3.0.0-31-server, linux-image-3.0.0-31-virtual, linux-image-3.0.0-31-generic-pae, linux-lts-backport-oneiric, linux-image-3.0.0-31-generic
  • USN-1900-1: linux-image-2.6.32-354-ec2, linux-ec2
  • USN-1673-1: linux-image-3.5.0-216-omap4, linux-ti-omap4
  • USN-1671-1: linux-image-3.5.0-21-omap, linux-image-3.5.0-21-highbank, linux-image-3.5.0-21-powerpc-smp, linux, linux-image-3.5.0-21-powerpc64-smp, linux-image-3.5.0-21-generic
  • USN-1720-1: linux-image-3.0.0-31-server, linux-image-3.0.0-31-virtual, linux, linux-image-3.0.0-31-omap, linux-image-3.0.0-31-generic-pae, linux-image-3.0.0-31-generic, linux-image-3.0.0-31-powerpc64-smp, linux-image-3.0.0-31-powerpc-smp, linux-image-3.0.0-31-powerpc
  • USN-1726-1: linux-ti-omap4, linux-image-3.0.0-1221-omap4
  • USN-1899-1: linux-image-2.6.32-49-versatile, linux, linux-image-2.6.32-49-generic-pae, linux-image-2.6.32-49-server, linux-image-2.6.32-49-ia64, linux-image-2.6.32-49-386, linux-image-2.6.32-49-virtual, linux-image-2.6.32-49-lpia, linux-image-2.6.32-49-sparc64, linux-image-2.6.32-49-powerpc64-smp, linux-image-2.6.32-49-preempt, linux-image-2.6.32-49-powerpc-smp, linux-image-2.6.32-49-generic, linux-image-2.6.32-49-powerpc, linux-image-2.6.32-49-sparc64-smp
  • USN-1653-1: linux-image-2.6.32-350-ec2, linux-ec2
  • USN-1651-1: linux-image-2.6.32-45-sparc64-smp, linux-image-2.6.32-45-sparc64, linux-image-2.6.32-45-preempt, linux, linux-image-2.6.32-45-386, linux-image-2.6.32-45-generic-pae, linux-image-2.6.32-45-powerpc, linux-image-2.6.32-45-server, linux-image-2.6.32-45-ia64, linux-image-2.6.32-45-virtual, linux-image-2.6.32-45-powerpc-smp, linux-image-2.6.32-45-powerpc64-smp, linux-image-2.6.32-45-generic, linux-image-2.6.32-45-lpia, linux-image-2.6.32-45-versatile
  • USN-1650-1: linux-image-2.6.24-32-generic, linux, linux-image-2.6.24-32-386, linux-image-2.6.24-32-powerpc-smp, linux-image-2.6.24-32-lpia, linux-image-2.6.24-32-sparc64, linux-image-2.6.24-32-powerpc64-smp, linux-image-2.6.24-32-virtual, linux-image-2.6.24-32-hppa64, linux-image-2.6.24-32-itanium, linux-image-2.6.24-32-hppa32, linux-image-2.6.24-32-sparc64-smp, linux-image-2.6.24-32-powerpc, linux-image-2.6.24-32-lpiacompat, linux-image-2.6.24-32-server, linux-image-2.6.24-32-rt, linux-image-2.6.24-32-openvz, linux-image-2.6.24-32-xen, linux-image-2.6.24-32-mckinley
  • USN-1798-1: linux-image-2.6.32-351-ec2, linux-ec2
  • USN-1792-1: linux-image-2.6.32-46-sparc64-smp, linux-image-2.6.32-46-server, linux-image-2.6.32-46-powerpc64-smp, linux, linux-image-2.6.32-46-generic-pae, linux-image-2.6.32-46-ia64, linux-image-2.6.32-46-sparc64, linux-image-2.6.32-46-386, linux-image-2.6.32-46-virtual, linux-image-2.6.32-46-generic, linux-image-2.6.32-46-versatile, linux-image-2.6.32-46-powerpc-smp, linux-image-2.6.32-46-preempt, linux-image-2.6.32-46-lpia, linux-image-2.6.32-46-powerpc
  • USN-1776-1: linux-image-2.6.32-351-ec2, linux-ec2
  • USN-1775-1: linux-image-2.6.32-46-sparc64-smp, linux-image-2.6.32-46-server, linux-image-2.6.32-46-powerpc64-smp, linux, linux-image-2.6.32-46-generic-pae, linux-image-2.6.32-46-ia64, linux-image-2.6.32-46-sparc64, linux-image-2.6.32-46-386, linux-image-2.6.32-46-virtual, linux-image-2.6.32-46-generic, linux-image-2.6.32-46-versatile, linux-image-2.6.32-46-powerpc-smp, linux-image-2.6.32-46-preempt, linux-image-2.6.32-46-lpia, linux-image-2.6.32-46-powerpc
  • USN-1829-1: linux-image-2.6.32-352-ec2, linux-ec2
  • USN-1824-1: linux-image-2.6.32-47-versatile, linux-image-2.6.32-47-virtual, linux-image-2.6.32-47-powerpc-smp, linux-image-2.6.32-47-lpia, linux, linux-image-2.6.32-47-preempt, linux-image-2.6.32-47-sparc64, linux-image-2.6.32-47-sparc64-smp, linux-image-2.6.32-47-generic-pae, linux-image-2.6.32-47-386, linux-image-2.6.32-47-generic, linux-image-2.6.32-47-ia64, linux-image-2.6.32-47-powerpc64-smp, linux-image-2.6.32-47-server, linux-image-2.6.32-47-powerpc