Overly broad permissions can turn one compromised account into a much larger security problem. Learn how to reduce unnecessary access, review privileges, and apply least privilege across modern Linux systems. Review Linux Privileges×

Alerts This Week
Warning Icon 1 465
Alerts This Week
Warning Icon 1 465

Ubuntu 13.10 USN-2179-1: Critical Kernel Flaws and Security Updates

ubuntu
Calendar Grey April 26, 2014
Scroller Ubuntu
Address vulnerabilities within the Linux kernel for Ubuntu 13.10 by implementing updates that rectify severe weaknesses and enhance overall system robustness.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux: Linux kernel

Details:

A flaw was discovered in the Kernel Virtual Machine (KVM) subsystem of the

Linux kernel. A guest OS user could exploit this flaw to execute arbitrary

code on the host OS. (CVE-2014-0049)

Al Viro discovered an error in how CIFS in the Linux kernel handles

uncached write operations. An unprivileged local user could exploit this

flaw to cause a denial of service (system crash), obtain sensitive

information from kernel memory, or possibly gain privileges.

(CVE-2014-0069)

Topics%20covered

Topics Covered

security advisory critical code execution Ubuntu kernel system crash

Update Instructions

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

Ubuntu 13.10:
  linux-image-3.11.0-20-generic   3.11.0-20.34
  linux-image-3.11.0-20-generic-lpae  3.11.0-20.34

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-2179-1

CVE-2014-0049, CVE-2014-0069

Severity
critical
Lowest
Low
Medium
High
Critical

April 26, 2014

Topics%20covered

Topics Covered

security advisory critical code execution Ubuntu kernel system crash

Package Information

https://launchpad.net/ubuntu/+source/linux/3.11.0-20.34

Get the latest News and Insights

Get the latest Linux and open source security news straight to your inbox.