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Ubuntu Security Notice USN-1899-1

Ubuntu Security Notice USN-1899-1
Posted Jul 5, 2013
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1899-1 - 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. 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. A format string vulnerability was discovered in Broadcom B43 wireless driver for the Linux kernel. A local user could exploit this flaw to gain administrative privileges. Various other issues were also addressed.

tags | advisory, kernel, local
systems | linux, ubuntu
advisories | CVE-2012-4508, CVE-2013-2141, CVE-2013-2852, CVE-2012-4508, CVE-2013-2141, CVE-2013-2852
SHA-256 | 593e00f04b6483ec844d0d0014bec0a0aa260fbb699fc4a75dbcdbfcd38c245d

Ubuntu Security Notice USN-1899-1

Change Mirror Download
============================================================================
Ubuntu Security Notice USN-1899-1
July 04, 2013

linux vulnerabilities
============================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 10.04 LTS

Summary:

Several security issues were fixed in the kernel.

Software Description:
- linux: Linux kernel

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)

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)

A format string vulnerability was discovered in 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 LTS:
linux-image-2.6.32-49-386 2.6.32-49.111
linux-image-2.6.32-49-generic 2.6.32-49.111
linux-image-2.6.32-49-generic-pae 2.6.32-49.111
linux-image-2.6.32-49-ia64 2.6.32-49.111
linux-image-2.6.32-49-lpia 2.6.32-49.111
linux-image-2.6.32-49-powerpc 2.6.32-49.111
linux-image-2.6.32-49-powerpc-smp 2.6.32-49.111
linux-image-2.6.32-49-powerpc64-smp 2.6.32-49.111
linux-image-2.6.32-49-preempt 2.6.32-49.111
linux-image-2.6.32-49-server 2.6.32-49.111
linux-image-2.6.32-49-sparc64 2.6.32-49.111
linux-image-2.6.32-49-sparc64-smp 2.6.32-49.111
linux-image-2.6.32-49-versatile 2.6.32-49.111
linux-image-2.6.32-49-virtual 2.6.32-49.111

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:
http://www.ubuntu.com/usn/usn-1899-1
CVE-2012-4508, CVE-2013-2141, CVE-2013-2852

Package Information:
https://launchpad.net/ubuntu/+source/linux/2.6.32-49.111
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