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 12.04 LTS USN-1833-1 Critical: Kernel Security Issues

ubuntu
Calendar Grey May 24, 2013
Scroller Ubuntu
Upgrade your Ubuntu system to address multiple patched kernel vulnerabilities that impact local user permissions and overall reliability.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux: Linux kernel

Details:

Andy Lutomirski discover an error in the Linux kernel's credential handling

on unix sockets. A local user could exploit this flaw to gain

administrative privileges. (CVE-2013-1979)

A buffer overflow vulnerability was discovered in the Broadcom tg3 ethernet

driver for the Linux kernel. A local user could exploit this flaw to cause

a denial of service (crash the system) or potentially escalate privileges

on the system. (CVE-2013-1929)

A flaw was discovered in the Linux kernel's ftrace subsystem interface. A

local user could exploit this flaw to cause a denial of service (system

crash). (CVE-2013-3301)

Topics%20covered

Topics Covered

security advisory denial of service buffer overflow kernel ubuntu administrative privilege

Update Instructions

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

Ubuntu 12.04 LTS:
  linux-image-3.2.0-44-generic    3.2.0-44.69
  linux-image-3.2.0-44-generic-pae  3.2.0-44.69
  linux-image-3.2.0-44-highbank   3.2.0-44.69
  linux-image-3.2.0-44-omap       3.2.0-44.69
  linux-image-3.2.0-44-powerpc-smp  3.2.0-44.69
  linux-image-3.2.0-44-powerpc64-smp  3.2.0-44.69
  linux-image-3.2.0-44-virtual    3.2.0-44.69

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-1833-1

CVE-2013-1929, CVE-2013-1979, CVE-2013-3301

Severity
critical
Lowest
Low
Medium
High
Critical

May 24, 2013

Topics%20covered

Topics Covered

security advisory denial of service buffer overflow kernel ubuntu administrative privilege

Package Information

https://launchpad.net/ubuntu/+source/linux/3.2.0-44.69

Get the latest News and Insights

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