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[USN-1899-1] Linux kernel vulnerabilities

Posted on 04 July 2013
Ubuntu Security

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Ubuntu Security Notice USN-1899-1
July 04, 2013

linux vulnerabilities
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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 automaticall=
y
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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