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Ubuntu 13.10: USN-2140-1 Moderate: Kernel Security Issues Overview

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Calendar Grey March 7, 2014
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Critical vulnerabilities in the Linux kernel highlighted in Ubuntu Security Notice USN-2140-1, posing risks to confidential kernel information and overall system integrity.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux: Linux kernel

Details:

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)

Matthew Thode reported a denial of service vulnerability in the Linux

kernel when SELinux support is enabled. A local user with the CAP_MAC_ADMIN

capability (and the SELinux mac_admin permission if running in enforcing

mode) could exploit this flaw to cause a denial of service (kernel crash).

(CVE-2014-1874)

An information leak was discovered in the Linux kernel's NFS filesystem. A

local users with write access to an NFS share could exploit this flaw to

obtain potential sensative information from kernel memo...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service security issue information leak kernel update Ubuntu kernel

Update Instructions

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

Ubuntu 13.10:
  linux-image-3.11.0-18-generic   3.11.0-18.32
  linux-image-3.11.0-18-generic-lpae  3.11.0-18.32

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-2140-1

CVE-2014-1690, CVE-2014-1874, CVE-2014-2038

March 07, 2014

Topics%20covered

Topics Covered

security advisory denial of service security issue information leak kernel update Ubuntu kernel

Package Information

https://launchpad.net/ubuntu/+source/linux/3.11.0-18.32

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