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Ubuntu 11.04: 1531-1 Critical: Kernel Denial Of Service Threats

ubuntu
Calendar Grey August 10, 2012
Scroller Ubuntu
A variety of weaknesses within the Ubuntu kernel have been resolved to improve overall system safety and thwart possible attacks.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux: Linux kernel

Details:

An error was discovered in the Linux kernel's network TUN/TAP device

implementation. A local user with access to the TUN/TAP interface (which is

not available to unprivileged users until granted by a root user) could

exploit this flaw to crash the system or potential gain administrative

privileges. (CVE-2012-2136)

A flaw was found in the Linux kernel's Reliable Datagram Sockets (RDS)

protocol implementation. A local, unprivileged user could use this flaw to

cause a denial of service. (CVE-2012-2372)

An error was discovered in the Linux kernel's memory subsystem (hugetlb).

An unprivileged local user could exploit this flaw to cause a denial of

service (crash the system). (CVE-2012-2390)

Topics%20covered

Topics Covered

security advisory denial of service local exploit kernel ubuntu system risk crash

Update Instructions

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

Ubuntu 11.04:
  linux-image-2.6.38-15-generic   2.6.38-15.65
  linux-image-2.6.38-15-generic-pae  2.6.38-15.65
  linux-image-2.6.38-15-omap      2.6.38-15.65
  linux-image-2.6.38-15-powerpc   2.6.38-15.65
  linux-image-2.6.38-15-powerpc-smp  2.6.38-15.65
  linux-image-2.6.38-15-powerpc64-smp  2.6.38-15.65
  linux-image-2.6.38-15-server    2.6.38-15.65
  linux-image-2.6.38-15-versatile  2.6.38-15.65
  linux-image-2.6.38-15-virtual   2.6.38-15.65

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

References

https://ubuntu.com/security/notices/USN-1531-1

CVE-2012-2136, CVE-2012-2372, CVE-2012-2390

Severity
critical
Lowest
Low
Medium
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Critical

August 10, 2012

Topics%20covered

Topics Covered

security advisory denial of service local exploit kernel ubuntu system risk crash

Package Information

https://launchpad.net/ubuntu/+source/linux/2.6.38-15.65

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