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Ubuntu 10.04 LTS USN-1573-1 Moderate: Linux Kernel DoS Flaws

ubuntu
Calendar Grey September 19, 2012
Scroller Ubuntu
Numerous vulnerabilities resolved in Ubuntu kernel impacting EC2, notably Denial-of-Service flaws highlighted by Ben Hutchings.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux-ec2: Linux kernel for EC2

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)

A flaw was discovered in the madvise feature of the Linux kernel's memory

subsystem. An unprivileged local use could exploit the flaw to cause a

denial of service (crash the system). (CVE-2012-3511)

Topics%20covered

Topics Covered

security advisory DoS Ubuntu kernel bug network driver linux-ec2

Update Instructions

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

Ubuntu 10.04 LTS:
  linux-image-2.6.32-348-ec2      2.6.32-348.54

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-1573-1

CVE-2012-3412, CVE-2012-3430, CVE-2012-3511

Severity
important
Lowest
Low
Medium
High
Critical

September 19, 2012

Topics%20covered

Topics Covered

security advisory DoS Ubuntu kernel bug network driver linux-ec2

Package Information

https://launchpad.net/ubuntu/+source/linux-ec2/2.6.32-348.54

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