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Ubuntu 12.04 LTS: USN-2239-1 Critical Kernel Denial of Service Fixes

ubuntu
Calendar Grey June 5, 2014
Scroller Ubuntu
Numerous vulnerabilities discovered in Ubuntu kernel receive patch updates aimed at averting system failures and safeguarding against unauthorized entry.
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:

Pinkie Pie discovered a flaw in the Linux kernel's futex subsystem. An

unprivileged local user could exploit this flaw to cause a denial of

service (system crash) or gain administrative privileges. (CVE-2014-3153)

A flaw was discovered in the Linux kernel virtual machine's (kvm)

validation of interrupt requests (irq). A guest OS user could exploit this

flaw to cause a denial of service (host OS crash). (CVE-2014-0155)

An information leak was discovered in the netfilter subsystem of the Linux

kernel. An attacker could exploit this flaw to obtain sensitive information

from kernel memory. (CVE-2014-2568)

Sasha Levin reported a bug in the Linux kernel's virtual memory management

subsystem. An unprivileged local user could exploit this flaw to cause a

denial of service (system crash). (CVE-2014-3122)

Topics%20covered

Topics Covered

security advisory denial of service information leak critical Ubuntu kernel

Update Instructions

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

Ubuntu 12.04 LTS:
  linux-image-3.11.0-23-generic   3.11.0-23.40~precise1
  linux-image-3.11.0-23-generic-lpae  3.11.0-23.40~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-2239-1

CVE-2014-0155, CVE-2014-2568, CVE-2014-3122, CVE-2014-3153

Severity
critical
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Critical

June 05, 2014

Topics%20covered

Topics Covered

security advisory denial of service information leak critical Ubuntu kernel

Package Information

https://launchpad.net/ubuntu/+source/linux-lts-saucy/3.11.0-23.40~precise1

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