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Ubuntu 10.04 LTS: USN-1453-1 Critical Kernel Denial of Service

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Calendar Grey May 25, 2012
Scroller Ubuntu
Secure your Ubuntu 10.04 LTS Kernel on EC2 by updating the kernel, applying security patches, and configuring access controls to prevent DoS vulnerabilities.
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:

A flaw was found in the Linux's kernels ext4 file system when mounted with

a journal. A local, unprivileged user could exploit this flaw to cause a

denial of service. (CVE-2011-4086)

A flaw was found in the Linux kernel's KVM (Kernel Virtual Machine) virtual

cpu setup. An unprivileged local user could exploit this flaw to crash the

system leading to a denial of service. (CVE-2012-1601)

Steve Grubb reported a flaw with Linux fscaps (file system base

capabilities) when used to increase the permissions of a process. For

application on which fscaps are in use a local attacker can disable address

space randomization to make attacking the process with raised privileges

easier. (CVE-2012-2123)

Topics%20covered

Topics Covered

security advisory denial of service local exploit system update ubuntu kernel issues linux-ec2

Update Instructions

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

Ubuntu 10.04 LTS:
  linux-image-2.6.32-345-ec2      2.6.32-345.48

After a standard system update you need to reboot your computer to make
all the necessary changes.

References

https://ubuntu.com/security/notices/USN-1453-1

CVE-2011-4086, CVE-2012-1601, CVE-2012-2123

Severity
critical
Lowest
Low
Medium
High
Critical

May 25, 2012

Topics%20covered

Topics Covered

security advisory denial of service local exploit system update ubuntu kernel issues linux-ec2

Package Information

https://launchpad.net/ubuntu/+source/linux-ec2/2.6.32-345.48

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