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Ubuntu 12.04 LTS USN-1698-1 Critical: Kernel DoS Risk Fixes

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Calendar Grey January 18, 2013
Scroller Ubuntu
The latest update from Ubuntu, USN-1698-1, outlines important patches for kernel vulnerabilities impacting the OMAP4 architecture, which could lead to severe Denial of Service scenarios.
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 handling of script execution

when module loading is enabled. A local attacker could exploit this flaw to

cause a leak of kernel stack contents. (CVE-2012-4530)

Florian Weimer discovered that hypervkvpd, which is distributed in the

Linux kernel, was not correctly validating source addresses of netlink

packets. An untrusted local user can cause a denial of service by causing

hypervkvpd to exit. (CVE-2012-5532)

Topics%20covered

Topics Covered

security advisory denial of service critical exploit kernel ubuntu linux-ti-omap4

Update Instructions

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

Ubuntu 12.04 LTS:
  linux-image-3.2.0-1424-omap4    3.2.0-1424.32

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

CVE-2012-4530, CVE-2012-5532

Severity
critical
Lowest
Low
Medium
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Critical

January 18, 2013

Topics%20covered

Topics Covered

security advisory denial of service critical exploit kernel ubuntu linux-ti-omap4

Package Information

https://launchpad.net/ubuntu/+source/linux-ti-omap4/3.2.0-1424.32

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