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Ubuntu 10.10 USN-1274-1 Critical: Kernel Denial Of Service

ubuntu
Calendar Grey November 21, 2011
Scroller Ubuntu
Addressing multiple vulnerabilities in the Ubuntu Linux kernel to improve overall system reliability and reduce potential denial of service threats.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux-mvl-dove: Linux kernel for DOVE

Details:

Vasily Averin discovered that the NFS Lock Manager (NLM) incorrectly

handled unlock requests. A local attacker could exploit this to cause a

denial of service. (CVE-2011-2491)

Robert Swiecki discovered that mapping extensions were incorrectly handled.

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

denial of service. (CVE-2011-2496)

It was discovered that the wireless stack incorrectly verified SSID

lengths. A local attacker could exploit this to cause a denial of service

or gain root privileges. (CVE-2011-2517)

Ben Pfaff discovered that Classless Queuing Disciplines (qdiscs) were being

incorrectly handled. A local attacker could exploit this to crash the

system, leading to a denial of service. (CVE-2011-2525)

Topics%20covered

Topics Covered

security advisory denial of service critical ubuntu linux-mvl-dove

Update Instructions

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

Ubuntu 10.10:
  linux-image-2.6.32-420-dove     2.6.32-420.38

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-1274-1

CVE-2011-2491, CVE-2011-2496, CVE-2011-2517, CVE-2011-2525

Severity
critical
Lowest
Low
Medium
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Critical

November 21, 2011

Topics%20covered

Topics Covered

security advisory denial of service critical ubuntu linux-mvl-dove

Package Information

https://launchpad.net/ubuntu/+source/linux-mvl-dove/2.6.32-420.38

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