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[USN-1847-1] Linux kernel vulnerability

Posted on 31 May 2013
Ubuntu Security

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Ubuntu Security Notice USN-1847-1
May 30, 2013

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

- Ubuntu 13.04

Summary:

The system could be made to crash or run programs as an administrator if
it received specially crafted network traffic.

Software Description:
- linux: Linux kernel

Details:

Kees Cook discovered a flaw in the Linux kernel's iSCSI subsystem. A remo=
te
unauthenticated attacker could exploit this flaw to cause a denial of
service (system crash) or potentially gain administrative privileges.

Update instructions:

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

Ubuntu 13.04:
linux-image-3.8.0-23-generic 3.8.0-23.34

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-1847-1
CVE-2013-2850

Package Information:
https://launchpad.net/ubuntu/+source/linux/3.8.0-23.34


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