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Ubuntu 12.04 LTS: USN-2158-1 Critical Kernel Security Advisories

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Calendar Grey April 1, 2014
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Ubuntu Security Notice USN-2200-3 investigates kernel vulnerabilities and potential threats, with a focus on mitigating denial of service challenges.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux-lts-raring: Linux hardware enablement kernel from Raring

Details:

Stephan Mueller reported an error in the Linux kernel's ansi cprng random

number generator. This flaw makes it easier for a local attacker to break

cryptographic protections. (CVE-2013-4345)

Nico Golde and Fabian Yamaguchi reported buffer underflow errors in the

implementation of the XFS filesystem in the Linux kernel. A local user with

CAP_SYS_ADMIN could exploit these flaw to cause a denial of service (memory

corruption) or possibly other unspecified issues. (CVE-2013-6382)

An information leak was discovered in the Linux kernel when built with the

NetFilter Connection Tracking (NF_CONNTRACK) support for IRC protocol

(NF_NAT_IRC). A remote attacker could exploit this flaw to obtain

potentially sensitive kernel information when communicating over a client-to-client IRC connection(/dcc) via a NAT-ed network. (CVE-2...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service kernel ubuntu buffer underflow random number generator

Update Instructions

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

Ubuntu 12.04 LTS:
  linux-image-3.8.0-38-generic    3.8.0-38.56~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-2158-1

CVE-2013-4345, CVE-2013-6382, CVE-2014-1690

Severity
critical
Lowest
Low
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Critical

April 01, 2014

Topics%20covered

Topics Covered

security advisory denial of service kernel ubuntu buffer underflow random number generator

Package Information

https://launchpad.net/ubuntu/+source/linux-lts-raring/3.8.0-38.56~precise1

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