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Ubuntu 12.04: USN-2285-1 Critical Multiple Kernel Exploits

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Calendar Grey July 17, 2014
Scroller Ubuntu
Important announcements for Ubuntu 12.04 LTS focusing on kernel flaws and possible vulnerabilities to enhance system safety.
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:

Sasha Levin reported a flaw in the Linux kernel's point-to-point protocol

(PPP) when used with the Layer Two Tunneling Protocol (L2TP). A local user

could exploit this flaw to gain administrative privileges. (CVE-2014-4943)

Michael S. Tsirkin discovered an information leak in the Linux kernel's

segmentation of skbs when using the zerocopy feature of vhost-net. A local

attacker could exploit this flaw to gain potentially sensitive information

from kernel memory. (CVE-2014-0131)

Salva Peiró discovered an information leak in the Linux kernel's media-device driver. A local attacker could exploit this flaw to obtain sensitive

information from kernel memory. (CVE-2014-1739)

A flaw was discovered in the Linux kernel's audit subsystem when auditing

certain syscalls. A local attacker could exploit this flaw to obtain

...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service information leak critical linux-lts-quantal administrative privileges

Update Instructions

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

Ubuntu 12.04 LTS:
  linux-image-3.5.0-54-generic    3.5.0-54.81~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-2285-1

CVE-2014-0131, CVE-2014-1739, CVE-2014-3917, CVE-2014-4014,

CVE-2014-4027, CVE-2014-4608, CVE-2014-4943

Severity
critical
Lowest
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Medium
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Critical

July 17, 2014

Topics%20covered

Topics Covered

security advisory denial of service information leak critical linux-lts-quantal administrative privileges

Package Information

https://launchpad.net/ubuntu/+source/linux-lts-quantal/3.5.0-54.81~precise1

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