1. Ubuntu Security Notices
  2. USN-1912-1

USN-1912-1: Linux kernel vulnerabilities

Publication date

29 July 2013

Overview

Several security issues were fixed in the kernel.

Releases

Packages

Details

Jonathan Salwan discovered an information leak in the Linux kernel's cdrom
driver. A local user can exploit this leak to obtain sensitive information
from kernel memory if the CD-ROM drive is malfunctioning. (CVE-2013-2164)

A flaw was discovered in the Linux kernel when an IPv6 socket is used to
connect to an IPv4 destination. An unprivileged local user could exploit
this flaw to cause a denial of service (system crash). (CVE-2013-2232)

An information leak was discovered in the IPSec key_socket implementation
in the Linux kernel. An local user could exploit this flaw to examine
potentially sensitive information in kernel memory. (CVE-2013-2234)

An information leak was discovered in the Linux kernel when reading
broadcast messages from the notify_policy interface of the IPSec
key_socket. A local user could exploit...

Jonathan Salwan discovered an information leak in the Linux kernel's cdrom
driver. A local user can exploit this leak to obtain sensitive information
from kernel memory if the CD-ROM drive is malfunctioning. (CVE-2013-2164)

A flaw was discovered in the Linux kernel when an IPv6 socket is used to
connect to an IPv4 destination. An unprivileged local user could exploit
this flaw to cause a denial of service (system crash). (CVE-2013-2232)

An information leak was discovered in the IPSec key_socket implementation
in the Linux kernel. An local user could exploit this flaw to examine
potentially sensitive information in kernel memory. (CVE-2013-2234)

An information leak was discovered in the Linux kernel when reading
broadcast messages from the notify_policy interface of the IPSec
key_socket. A local user could exploit this flaw to examine potentially
sensitive information in kernel memory.
(CVE-2013-2237)

Kees Cook discovered a format string vulnerability in the Linux kernel's
disk block layer. A local user with administrator privileges could exploit
this flaw to gain kernel privileges. (CVE-2013-2851)

Update instructions

After a standard system update you need to reboot your computer to make all the necessary changes.

Learn more about how to get the fixes.

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.

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

Ubuntu Release Package Version
10.04 lucid linux-image-2.6.32-50-versatile –  2.6.32-50.112
linux-image-2.6.32-50-sparc64-smp –  2.6.32-50.112
linux-image-2.6.32-50-generic –  2.6.32-50.112
linux-image-2.6.32-50-powerpc –  2.6.32-50.112
linux-image-2.6.32-50-preempt –  2.6.32-50.112
linux-image-2.6.32-50-generic-pae –  2.6.32-50.112
linux-image-2.6.32-50-virtual –  2.6.32-50.112
linux-image-2.6.32-50-386 –  2.6.32-50.112
linux-image-2.6.32-50-lpia –  2.6.32-50.112
linux-image-2.6.32-50-ia64 –  2.6.32-50.112
linux-image-2.6.32-50-server –  2.6.32-50.112
linux-image-2.6.32-50-powerpc64-smp –  2.6.32-50.112
linux-image-2.6.32-50-powerpc-smp –  2.6.32-50.112
linux-image-2.6.32-50-sparc64 –  2.6.32-50.112

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References

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