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Ubuntu Security Notice USN-1931-1

Ubuntu Security Notice USN-1931-1
Posted Aug 20, 2013
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1931-1 - Chanam Park reported a Null pointer flaw in the Linux kernel's Ceph client. A remote attacker could exploit this flaw to cause a denial of service (system crash). An information leak was discovered in the Linux kernel's fanotify interface. A local user could exploit this flaw to obtain sensitive information from kernel memory. 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. Various other issues were also addressed.

tags | advisory, remote, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2013-1059, CVE-2013-2148, CVE-2013-2164, CVE-2013-2851, CVE-2013-1059, CVE-2013-2148, CVE-2013-2164, CVE-2013-2851
SHA-256 | ff0f4ce4c92fb685f81150d2928d46bd35bd6fe80f01c3cafaf05ff55984bc9c

Ubuntu Security Notice USN-1931-1

Change Mirror Download
============================================================================
Ubuntu Security Notice USN-1931-1
August 20, 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:

Chanam Park reported a Null pointer flaw in the Linux kernel's Ceph client.
A remote attacker could exploit this flaw to cause a denial of service
(system crash). (CVE-2013-1059)

An information leak was discovered in the Linux kernel's fanotify
interface. A local user could exploit this flaw to obtain sensitive
information from kernel memory. (CVE-2013-2148)

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)

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:

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

Ubuntu 12.04 LTS:
linux-image-3.5.0-39-generic 3.5.0-39.60~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-1931-1
CVE-2013-1059, CVE-2013-2148, CVE-2013-2164, CVE-2013-2851

Package Information:
https://launchpad.net/ubuntu/+source/linux-lts-quantal/3.5.0-39.60~precise1
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