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Ubuntu 12.04 LTS USN-2137-1 Critical: Kernel Denial of Service Threats

ubuntu
Calendar Grey March 7, 2014
Scroller Ubuntu
Keep your Ubuntu systems updated to tackle critical kernel vulnerabilities that could lead to denial-of-service attacks and data exposure as per USN-2137-1
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux-lts-saucy: Linux hardware enablement kernel from Saucy

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 potenti...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory information leak update critical doS kernel ubuntu

Update Instructions

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

Ubuntu 12.04 LTS:
  linux-image-3.11.0-18-generic   3.11.0-18.32~precise1
  linux-image-3.11.0-18-generic-lpae  3.11.0-18.32~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-2137-1

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

Severity
critical
Lowest
Low
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Critical

March 07, 2014

Topics%20covered

Topics Covered

security advisory information leak update critical doS kernel ubuntu

Package Information

https://launchpad.net/ubuntu/+source/linux-lts-saucy/3.11.0-18.32~precise1

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