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Ubuntu 12.04 LTS: USN-1579-1 Critical: Kernel Bugs Lead To DoS

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Calendar Grey September 21, 2012
Scroller Ubuntu
Numerous vulnerabilities addressed in Ubuntu: Ensure you update quickly to avoid service interruptions and safeguard sensitive data.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux: Linux kernel

Details:

Ben Hutchings reported a flaw in the Linux kernel with some network drivers

that support TSO (TCP segment offload). A local or peer user could exploit

this flaw to to cause a denial of service. (CVE-2012-3412)

Jay Fenlason and Doug Ledford discovered a bug in the Linux kernel

implementation of RDS sockets. A local unprivileged user could potentially

use this flaw to read privileged information from the kernel.

(CVE-2012-3430)

Topics%20covered

Topics Covered

security advisory denial of service bug fix kernel ubuntu information leakage network issue

Update Instructions

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

Ubuntu 12.04 LTS:
  linux-image-3.2.0-31-generic    3.2.0-31.50
  linux-image-3.2.0-31-generic-pae  3.2.0-31.50
  linux-image-3.2.0-31-highbank   3.2.0-31.50
  linux-image-3.2.0-31-omap       3.2.0-31.50
  linux-image-3.2.0-31-powerpc-smp  3.2.0-31.50
  linux-image-3.2.0-31-powerpc64-smp  3.2.0-31.50
  linux-image-3.2.0-31-virtual    3.2.0-31.50

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-1579-1

CVE-2012-3412, CVE-2012-3430

Severity
critical
Lowest
Low
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Critical

September 21, 2012

Topics%20covered

Topics Covered

security advisory denial of service bug fix kernel ubuntu information leakage network issue

Package Information

https://launchpad.net/ubuntu/+source/linux/3.2.0-31.50

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