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USN-1651-1: Linux kernel vulnerability

30 November 2012

The system could be made to crash under certain conditions.

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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 an information leak in the Linux kernel's TUN/TAP
device driver. A local user could exploit this flaw to examine part of the
kernel's stack memory. (CVE-2012-6547)

Denys Fedoryshchenko discovered a flaw in the Linux kernel's TCP receive
processing for IPv4. A remote attacker could exploit this flaw to cause a
denial of service (kernel resource consumption) via a flood of SYN+FIN TCP
packets. (CVE-2012-6638)

A flaw was discovered in the requeuing of futexes in the Linux kernel. A
local user could exploit this flaw to cause a denial of service (system
crash) or possibly have other unspecified impact. (CVE-2012-6647)

A flaw was found in Linux kernel's validation of CIPSO (Common IP Security
Option) options set from userspace. A local user that can set a socket's
CIPSO options could exploit this flaw to cause a denial of service (crash
the system). (CVE-2013-0310)

Mathias Krause discover an error in Linux kernel's Datagram Congestion
Control Protocol (DCCP) Congestion Control Identifier (CCID) use. A local
attack could exploit this flaw to cause a denial of service (crash) and
potentially escalate privileges if the user can mmap page 0.

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.

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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.

Related notices

  • USN-1648-1: linux-image-3.0.0-28-generic-pae, linux-image-3.0.0-28-server, linux-image-3.0.0-28-generic, linux-image-3.0.0-28-powerpc64-smp, linux-image-3.0.0-28-powerpc, linux-image-3.0.0-28-powerpc-smp, linux-image-3.0.0-28-virtual, linux, linux-image-3.0.0-28-omap
  • USN-1653-1: linux-ec2, linux-image-2.6.32-350-ec2
  • USN-1644-1: linux-image-3.2.0-34-powerpc64-smp, linux-image-3.2.0-34-powerpc-smp, linux-image-3.2.0-34-generic, linux-image-3.2.0-34-omap, linux-image-3.2.0-34-virtual, linux-image-3.2.0-34-highbank, linux, linux-image-3.2.0-34-generic-pae
  • USN-1649-1: linux-image-3.0.0-1218-omap4, linux-ti-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-1650-1: linux-image-2.6.24-32-powerpc64-smp, linux-image-2.6.24-32-rt, linux-image-2.6.24-32-mckinley, linux-image-2.6.24-32-virtual, linux-image-2.6.24-32-powerpc, linux-image-2.6.24-32-openvz, linux, linux-image-2.6.24-32-lpiacompat, linux-image-2.6.24-32-server, linux-image-2.6.24-32-lpia, linux-image-2.6.24-32-generic, linux-image-2.6.24-32-powerpc-smp, linux-image-2.6.24-32-sparc64, linux-image-2.6.24-32-hppa32, linux-image-2.6.24-32-sparc64-smp, linux-image-2.6.24-32-xen, linux-image-2.6.24-32-hppa64, linux-image-2.6.24-32-386, linux-image-2.6.24-32-itanium
  • USN-1646-1: linux-image-3.5.0-19-powerpc64-smp, linux-image-3.5.0-19-powerpc-smp, linux-image-3.5.0-19-highbank, linux-image-3.5.0-19-omap, linux, linux-image-3.5.0-19-generic
  • USN-1647-1: linux-image-3.5.0-215-omap4, linux-ti-omap4
  • USN-1652-1: linux-lts-backport-oneiric, linux-image-3.0.0-28-server, linux-image-3.0.0-28-generic-pae, linux-image-3.0.0-28-generic, linux-image-3.0.0-28-virtual
  • USN-1554-1: linux-image-3.0.0-25-generic, linux-image-3.0.0-25-generic-pae, linux-image-3.0.0-25-virtual, linux-image-3.0.0-25-powerpc, linux-image-3.0.0-25-omap, linux, linux-image-3.0.0-25-powerpc64-smp, linux-image-3.0.0-25-server, linux-image-3.0.0-25-powerpc-smp
  • USN-1579-1: linux-image-3.2.0-31-powerpc-smp, linux-image-3.2.0-31-highbank, linux-image-3.2.0-31-virtual, linux-image-3.2.0-31-omap, linux-image-3.2.0-31-powerpc64-smp, linux-image-3.2.0-31-generic, linux, linux-image-3.2.0-31-generic-pae
  • USN-1580-1: linux-image-3.2.0-1419-omap4, linux-ti-omap4
  • USN-1558-1: linux-image-3.0.0-1215-omap4, linux-ti-omap4
  • USN-1563-1: linux-lts-backport-oneiric, linux-image-3.0.0-25-generic, linux-image-3.0.0-25-generic-pae, linux-image-3.0.0-25-virtual, linux-image-3.0.0-25-server
  • USN-1529-1: linux-image-3.2.0-29-generic-pae, linux-image-3.2.0-29-generic, linux-image-3.2.0-29-omap, linux-image-3.2.0-29-powerpc64-smp, linux-image-3.2.0-29-powerpc-smp, linux-image-3.2.0-29-virtual, linux-image-3.2.0-29-highbank, linux
  • USN-1514-1: linux-ti-omap4, linux-image-3.2.0-1417-omap4
  • USN-1607-1: linux-image-3.0.0-26-powerpc, linux-image-3.0.0-26-omap, linux-image-3.0.0-26-powerpc64-smp, linux-image-3.0.0-26-virtual, linux-image-3.0.0-26-powerpc-smp, linux-image-3.0.0-26-server, linux-image-3.0.0-26-generic, linux, linux-image-3.0.0-26-generic-pae
  • USN-1599-1: linux-image-3.2.0-1420-omap4, linux-ti-omap4
  • USN-1594-1: linux-lts-backport-oneiric, linux-image-3.0.0-26-virtual, linux-image-3.0.0-26-generic, linux-image-3.0.0-26-server, linux-image-3.0.0-26-generic-pae
  • USN-1610-1: linux-image-3.2.0-32-powerpc64-smp, linux-image-3.2.0-32-generic-pae, linux-image-3.2.0-32-generic, linux-image-3.2.0-32-virtual, linux-image-3.2.0-32-highbank, linux-image-3.2.0-32-powerpc-smp, linux-image-3.2.0-32-omap, linux
  • USN-1609-1: linux-image-3.0.0-1216-omap4, linux-ti-omap4