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Ubuntu 12.04 LTS USN-1839-1 Critical Privilege Escalation Threat

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Calendar Grey May 28, 2013
Scroller Ubuntu
Critical vulnerabilities were resolved in Ubuntu's OMAP4 Linux kernel, necessitating prompt system upgrades and reboots for users.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux-ti-omap4: Linux kernel for OMAP4

Details:

A flaw was discovered in the Linux kernel's perf_events interface. A local

user could exploit this flaw to escalate privileges on the system.

(CVE-2013-2094)

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 privilege escalation Ubuntu kernel

Update Instructions

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

Ubuntu 12.04 LTS:
  linux-image-3.2.0-1432-omap4    3.2.0-1432.41

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-1839-1

CVE-2013-1929, CVE-2013-1979, CVE-2013-2094, CVE-2013-3301

Severity
critical
Lowest
Low
Medium
High
Critical

May 28, 2013

Topics%20covered

Topics Covered

security advisory denial of service privilege escalation Ubuntu kernel

Package Information

https://launchpad.net/ubuntu/+source/linux-ti-omap4/3.2.0-1432.41

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