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Ubuntu Security Notice USN-2040-1

Ubuntu Security Notice USN-2040-1
Posted Dec 4, 2013
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 2040-1 - A flaw was discovered in the Linux kernel's dm snapshot facility. A remote authenticated user could exploit this flaw to obtain sensitive information or modify/corrupt data. Hannes Frederic Sowa discovered a flaw in the Linux kernel's UDP Fragmentation Offload (UFO). An unprivileged local user could exploit this flaw to cause a denial of service (system crash) or possibly gain administrative privileges. Various other issues were also addressed.

tags | advisory, remote, denial of service, kernel, local, udp
systems | linux, ubuntu
advisories | CVE-2013-4299, CVE-2013-4470, CVE-2013-4299, CVE-2013-4470
SHA-256 | af9463083a622904006c60e2c6be905bedc2d93a64cda6378ec05d653f777575

Ubuntu Security Notice USN-2040-1

Change Mirror Download
============================================================================
Ubuntu Security Notice USN-2040-1
December 03, 2013

linux-lts-quantal vulnerabilities
============================================================================

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

- Ubuntu 12.04 LTS

Summary:

Several security issues were fixed in the kernel.

Software Description:
- linux-lts-quantal: Linux hardware enablement kernel from Quantal

Details:

A flaw was discovered in the Linux kernel's dm snapshot facility. A remote
authenticated user could exploit this flaw to obtain sensitive information
or modify/corrupt data. (CVE-2013-4299)

Hannes Frederic Sowa discovered a flaw in the Linux kernel's UDP
Fragmenttation Offload (UFO). An unprivileged local user could exploit this
flaw to cause a denial of service (system crash) or possibly gain
administrative privileges. (CVE-2013-4470)

Update instructions:

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

Ubuntu 12.04 LTS:
linux-image-3.5.0-44-generic 3.5.0-44.67~precise1

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-2040-1
CVE-2013-4299, CVE-2013-4470

Package Information:
https://launchpad.net/ubuntu/+source/linux-lts-quantal/3.5.0-44.67~precise1
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