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Ubuntu 14.04 LTS USN-2517-1 Low: Kernel Threats and Security Fixes

ubuntu
Calendar Grey February 26, 2015
Dist Ubuntu Esm H88
Various vulnerabilities in the kernel addressed in alignment with Ubuntu Security Notice USN-2517-1, impacting version 14.04 LTS and its associated derivatives.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux-lts-utopic: Linux hardware enablement kernel from Utopic

Details:

A flaw was discovered in the Kernel Virtual Machine's (KVM) emulation of

the SYSTENTER instruction when the guest OS does not initialize the

SYSENTER MSRs. A guest OS user could exploit this flaw to cause a denial of

service of the guest OS (crash) or potentially gain privileges on the guest

OS. (CVE-2015-0239)

Andy Lutomirski discovered an information leak in the Linux kernel's Thread

Local Storage (TLS) implementation allowing users to bypass the espfix to

obtain information that could be used to bypass the Address Space Layout

Randomization (ASLR) protection mechanism. A local user could exploit this

flaw to obtain potentially sensitive information from kernel memory.

(CVE-2014-8133)

A restriction bypass was discovered in iptables when conntrack rules are

specified and the conntrack protocol handler module is...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service low severity kernel issue ubuntu linux-lts-utopic

Update Instructions

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

Ubuntu 14.04 LTS:
  linux-image-3.16.0-31-generic   3.16.0-31.41~14.04.1
  linux-image-3.16.0-31-generic-lpae  3.16.0-31.41~14.04.1
  linux-image-3.16.0-31-lowlatency  3.16.0-31.41~14.04.1
  linux-image-3.16.0-31-powerpc-e500mc  3.16.0-31.41~14.04.1
  linux-image-3.16.0-31-powerpc-smp  3.16.0-31.41~14.04.1
  linux-image-3.16.0-31-powerpc64-emb  3.16.0-31.41~14.04.1
  linux-image-3.16.0-31-powerpc64-smp  3.16.0-31.41~14.04.1

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-2517-1

CVE-2014-8133, CVE-2014-8160, CVE-2014-8559, CVE-2014-8989,

CVE-2014-9419, CVE-2014-9420, CVE-2014-9428, CVE-2014-9529,

CVE-2014-9584, CVE-2014-9585, CVE-2014-9683, CVE-2015-0239

Severity
low
Lowest
Low
Medium
High
Critical

February 26, 2015

Topics%20covered

Topics Covered

security advisory denial of service low severity kernel issue ubuntu linux-lts-utopic

Package Information

https://launchpad.net/ubuntu/+source/linux-lts-utopic/3.16.0-31.41~14.04.1

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