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Ubuntu 11.04 USN-1246-1 Moderate: Kernel Exploits and Updates

ubuntu
Calendar Grey October 25, 2011
Scroller Ubuntu
Critical advisory issued for Debian concerning several Linux kernel vulnerabilities that could result in service interruptions or potential system failures.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux: Linux kernel

Details:

Dan Rosenberg discovered that the IPv4 diagnostic routines did not

correctly validate certain requests. A local attacker could exploit this to

consume CPU resources, leading to a denial of service. (CVE-2011-2213)

Dan Rosenberg discovered that the Bluetooth stack incorrectly handled

certain L2CAP requests. If a system was using Bluetooth, a remote attacker

could send specially crafted traffic to crash the system or gain root

privileges. (CVE-2011-2497)

It was discovered that the EXT4 filesystem contained multiple off-by-one

flaws. A local attacker could exploit this to crash the system, leading to

a denial of service. (CVE-2011-2695)

Mauro Carvalho Chehab discovered that the si4713 radio driver did not

correctly check the length of memory copies. If this hardware was

available, a local attacker could exploit this to crash the system or gain

root privi...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu local exploit kernel system update security issues

Update Instructions

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

Ubuntu 11.04:
  linux-image-2.6.38-12-generic   2.6.38-12.51
  linux-image-2.6.38-12-generic-pae  2.6.38-12.51
  linux-image-2.6.38-12-omap      2.6.38-12.51
  linux-image-2.6.38-12-powerpc   2.6.38-12.51
  linux-image-2.6.38-12-powerpc-smp  2.6.38-12.51
  linux-image-2.6.38-12-powerpc64-smp  2.6.38-12.51
  linux-image-2.6.38-12-server    2.6.38-12.51
  linux-image-2.6.38-12-versatile  2.6.38-12.51
  linux-image-2.6.38-12-virtual   2.6.38-12.51

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-1246-1

CVE-2011-2213, CVE-2011-2497, CVE-2011-2695, CVE-2011-2700,

CVE-2011-2723, CVE-2011-2928, CVE-2011-3188, CVE-2011-3191

Severity
important
Lowest
Low
Medium
High
Critical

October 25, 2011

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu local exploit kernel system update security issues

Package Information

https://launchpad.net/ubuntu/+source/linux/2.6.38-12.51

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