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USN-1648-1: Linux kernel 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)

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)

Mathias Krause discovered information leak in the Linux kernel's compat
ioctl interface. A local user could exploit the flaw to examine parts of
kernel stack memory (CVE-2012-6539)

Mathias Krause discovered an information leak in the Linux kernel's
getsockopt for IP_VS_SO_GET_TIMEOUT. A local user could exploit this flaw
to examine parts of kernel stack memory. (CVE-2012-6540)

Mathias Krause discovered an information leak in the Linux kernel's
getsockopt implementation for the Datagram Congestion Control Protocol
(DCCP). A local user could exploit this flaw to examine some of the
kernel's stack memory. (CVE-2012-6541)

Mathias Krause discovered an information leak in the Linux kernel's
getsockname implementation for Logical Link Layer (llc) sockets. A local
user could exploit this flaw to examine some of the kernel's stack memory.
(CVE-2012-6542)

Mathias Krause discovered information leaks in the Linux kernel's Bluetooth
Logical Link Control and Adaptation Protocol (L2CAP) implementation. A
local user could exploit these flaws to examine some of the kernel's stack
memory. (CVE-2012-6544)

Mathias Krause discovered information leaks in the Linux kernel's Bluetooth
RFCOMM protocol implementation. A local user could exploit these flaws to
examine parts of kernel memory. (CVE-2012-6545)

Mathias Krause discovered information leaks in the Linux kernel's
Asynchronous Transfer Mode (ATM) networking stack. A local user could
exploit these flaws to examine some parts of kernel memory. (CVE-2012-6546)

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)

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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-1644-1: linux-image-3.2.0-34-omap, 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-powerpc-smp, linux-image-3.2.0-34-highbank, linux, linux-image-3.2.0-34-powerpc64-smp
  • USN-1649-1: linux-ti-omap4, linux-image-3.0.0-1218-omap4
  • USN-1645-1: linux-image-3.2.0-1422-omap4, linux-ti-omap4
  • USN-1704-1: linux-image-3.5.0-22-generic, linux-lts-quantal
  • USN-1646-1: linux-image-3.5.0-19-generic, linux-image-3.5.0-19-highbank, linux-image-3.5.0-19-omap, linux-image-3.5.0-19-powerpc-smp, linux, 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-generic-pae, linux-image-3.0.0-28-server, linux-image-3.0.0-28-virtual, linux-lts-backport-oneiric, linux-image-3.0.0-28-generic
  • USN-1653-1: linux-ec2, linux-image-2.6.32-350-ec2
  • USN-1651-1: linux-image-2.6.32-45-versatile, linux-image-2.6.32-45-sparc64-smp, linux-image-2.6.32-45-powerpc-smp, linux-image-2.6.32-45-386, linux-image-2.6.32-45-powerpc64-smp, linux-image-2.6.32-45-ia64, linux-image-2.6.32-45-powerpc, linux-image-2.6.32-45-virtual, linux-image-2.6.32-45-lpia, linux-image-2.6.32-45-sparc64, linux-image-2.6.32-45-server, linux-image-2.6.32-45-preempt, linux, linux-image-2.6.32-45-generic, linux-image-2.6.32-45-generic-pae
  • USN-1650-1: linux-image-2.6.24-32-386, linux-image-2.6.24-32-mckinley, linux-image-2.6.24-32-sparc64-smp, linux-image-2.6.24-32-virtual, linux-image-2.6.24-32-generic, linux-image-2.6.24-32-server, linux-image-2.6.24-32-powerpc, linux-image-2.6.24-32-powerpc64-smp, linux-image-2.6.24-32-hppa32, linux-image-2.6.24-32-lpia, linux-image-2.6.24-32-openvz, linux-image-2.6.24-32-sparc64, linux-image-2.6.24-32-xen, linux-image-2.6.24-32-lpiacompat, linux, linux-image-2.6.24-32-itanium, linux-image-2.6.24-32-hppa64, linux-image-2.6.24-32-powerpc-smp, linux-image-2.6.24-32-rt
  • USN-1798-1: linux-image-2.6.32-351-ec2, linux-ec2
  • USN-1792-1: linux-image-2.6.32-46-powerpc-smp, linux-image-2.6.32-46-ia64, linux-image-2.6.32-46-386, linux-image-2.6.32-46-lpia, linux-image-2.6.32-46-server, linux-image-2.6.32-46-sparc64, linux-image-2.6.32-46-powerpc64-smp, linux-image-2.6.32-46-virtual, linux-image-2.6.32-46-generic-pae, linux-image-2.6.32-46-preempt, linux-image-2.6.32-46-powerpc, linux-image-2.6.32-46-sparc64-smp, linux-image-2.6.32-46-generic, linux, linux-image-2.6.32-46-versatile
  • USN-1599-1: linux-ti-omap4, linux-image-3.2.0-1420-omap4
  • USN-1610-1: linux-image-3.2.0-32-powerpc-smp, linux-image-3.2.0-32-generic, linux-image-3.2.0-32-powerpc64-smp, linux-image-3.2.0-32-omap, linux-image-3.2.0-32-virtual, linux-image-3.2.0-32-highbank, linux-image-3.2.0-32-generic-pae, linux
  • USN-1805-1: linux-image-2.6.32-46-powerpc-smp, linux-image-2.6.32-46-ia64, linux-image-2.6.32-46-386, linux-image-2.6.32-46-lpia, linux-image-2.6.32-46-server, linux-image-2.6.32-46-sparc64, linux-image-2.6.32-46-powerpc64-smp, linux-image-2.6.32-46-virtual, linux-image-2.6.32-46-generic-pae, linux-image-2.6.32-46-preempt, linux-image-2.6.32-46-powerpc, linux-image-2.6.32-46-sparc64-smp, linux-image-2.6.32-46-generic, linux, linux-image-2.6.32-46-versatile
  • USN-1808-1: linux-image-2.6.32-351-ec2, linux-ec2
  • USN-1776-1: linux-image-2.6.32-351-ec2, linux-ec2
  • USN-1775-1: linux-image-2.6.32-46-powerpc-smp, linux-image-2.6.32-46-ia64, linux-image-2.6.32-46-386, linux-image-2.6.32-46-lpia, linux-image-2.6.32-46-server, linux-image-2.6.32-46-sparc64, linux-image-2.6.32-46-powerpc64-smp, linux-image-2.6.32-46-virtual, linux-image-2.6.32-46-generic-pae, linux-image-2.6.32-46-preempt, linux-image-2.6.32-46-powerpc, linux-image-2.6.32-46-sparc64-smp, linux-image-2.6.32-46-generic, linux, linux-image-2.6.32-46-versatile
  • USN-1829-1: linux-image-2.6.32-352-ec2, linux-ec2
  • USN-1824-1: linux-image-2.6.32-47-powerpc, linux-image-2.6.32-47-generic-pae, linux-image-2.6.32-47-preempt, linux-image-2.6.32-47-generic, linux-image-2.6.32-47-versatile, linux-image-2.6.32-47-lpia, linux-image-2.6.32-47-sparc64, linux-image-2.6.32-47-virtual, linux-image-2.6.32-47-sparc64-smp, linux-image-2.6.32-47-server, linux-image-2.6.32-47-powerpc-smp, linux-image-2.6.32-47-powerpc64-smp, linux, linux-image-2.6.32-47-386, linux-image-2.6.32-47-ia64
  • USN-1673-1: linux-ti-omap4, linux-image-3.5.0-216-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-image-3.5.0-21-powerpc64-smp, linux

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Further reading