USN-2158-1: Linux kernel (Raring HWE) vulnerabilities

Ubuntu Security Notice USN-2158-1

1st April, 2014

linux-lts-raring 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-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-2014-1690)

Update instructions

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

Ubuntu 12.04 LTS:

linux-image-3.8.0-38-generic 3.8.0-38.56~precise1

To update your system, please follow these instructions: http://bit.ly/1aJDvTw.

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

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

via Ubuntu Security Notices http://bit.ly/1dMx34w