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Ubuntu 11.10 USN-1607-1 Severe: Kernel DoS and Escalation

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Calendar Grey October 11, 2012
Scroller Ubuntu
A number of vulnerabilities addressed in Ubuntu 11.10 kernel impacting overall system integrity and safety.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux: Linux kernel

Details:

Vadim Ponomarev discovered a flaw in the Linux kernel causing a reference

leak when PID namespaces are used. A remote attacker could exploit this

flaw causing a denial of service. (CVE-2012-2127)

A flaw was found in how the Linux kernel's KVM (Kernel-based Virtual

Machine) subsystem handled MSI (Message Signaled Interrupts). A local

unprivileged user could exploit this flaw to cause a denial of service or

potentially elevate privileges. (CVE-2012-2137)

Topics%20covered

Topics Covered

security advisory denial of service privilege escalation kernel ubuntu linux

Update Instructions

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

Ubuntu 11.10:
  linux-image-3.0.0-26-generic    3.0.0-26.43
  linux-image-3.0.0-26-generic-pae  3.0.0-26.43
  linux-image-3.0.0-26-omap       3.0.0-26.43
  linux-image-3.0.0-26-powerpc    3.0.0-26.43
  linux-image-3.0.0-26-powerpc-smp  3.0.0-26.43
  linux-image-3.0.0-26-powerpc64-smp  3.0.0-26.43
  linux-image-3.0.0-26-server     3.0.0-26.43
  linux-image-3.0.0-26-virtual    3.0.0-26.43

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

References

https://ubuntu.com/security/notices/USN-1607-1

CVE-2012-2127, CVE-2012-2137

Severity
critical
Lowest
Low
Medium
High
Critical

October 11, 2012

Topics%20covered

Topics Covered

security advisory denial of service privilege escalation kernel ubuntu linux

Package Information

https://launchpad.net/ubuntu/+source/linux/3.0.0-26.43

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