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Ubuntu 12.04 LTS USN-2336-1 Critical: Kernel Denial of Service Risks

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Calendar Grey September 2, 2014
Scroller Ubuntu
Ubuntu Security Announcement USN-1983-2 outlines security weaknesses in linux-lts-trusty along with resolutions for multiple vulnerabilities.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux-lts-trusty: Linux hardware enablement kernel from Trusty

Details:

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)

Andy Lutomirski discovered a flaw in the authorization of netlink socket

operations when a socket is passed to a process of more privilege. A local

user could exploit this flaw to bypass access restrictions by having a

privileged executable do something it was not intended to do.

(CVE-2014-0181)

An information leak was discovered in the Linux kernels

aio_read_events_ring function. A local user could exploit this flaw to

obtain potentially sensitive information from kernel memory.

(CVE-2014-0206)

A flaw was discovered in the Linux kernel's implementation of user

namespaces with respect to inode permissions...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service information leak critical security kernel issues linux-lts-trusty ubuntu 12.04

Update Instructions

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

Ubuntu 12.04 LTS:
  linux-image-3.13.0-35-generic   3.13.0-35.62~precise1
  linux-image-3.13.0-35-generic-lpae  3.13.0-35.62~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-2336-1

CVE-2014-0155, CVE-2014-0181, CVE-2014-0206, CVE-2014-4014,

CVE-2014-4027, CVE-2014-4171, CVE-2014-4508, CVE-2014-4652,

CVE-2014-4653, CVE-2014-4654, CVE-2014-4655, CVE-2014-4656,

CVE-2014-4667, CVE-2014-5045

Severity
critical
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Low
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Critical

September 02, 2014

Topics%20covered

Topics Covered

security advisory denial of service information leak critical security kernel issues linux-lts-trusty ubuntu 12.04

Package Information

https://launchpad.net/ubuntu/+source/linux-lts-trusty/3.13.0-35.62~precise1

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