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Ubuntu 12.04 LTS USN-1931-1 Critical: Kernel Risks and Fixes

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Calendar Grey August 20, 2013
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Important kernel updates for Ubuntu 12.04 LTS users are now available, addressing critical security vulnerabilities for enhanced protection
Several security issues were fixed in the kernel.

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)

Topics%20covered

Topics Covered

security advisory denial of service information leak critical format string kernel ubuntu

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

https://ubuntu.com/security/notices/USN-1931-1

CVE-2013-1059, CVE-2013-2148, CVE-2013-2164, CVE-2013-2851

Severity
critical
Lowest
Low
Medium
High
Critical

August 20, 2013

Topics%20covered

Topics Covered

security advisory denial of service information leak critical format string kernel ubuntu

Package Information

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

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