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Ubuntu 10.04 LTS USN-2491-1 Critical: Kernel Denial Of Service Issues

ubuntu
Calendar Grey February 4, 2015
Dist Ubuntu Esm H88
Multiple kernel security flaws impacting Ubuntu 10.04 LTS have been disclosed, highlighting risks for DoS attacks and potential administrator exploitation.
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:

Andy Lutomirski discovered that the Linux kernel does not properly handle

faults associated with the Stack Segment (SS) register in the x86

architecture. A local attacker could exploit this flaw to gain

administrative privileges. (CVE-2014-9322)

Lars Bull reported a race condition in the PIT (programmable interrupt

timer) emulation in the KVM (Kernel Virtual Machine) subsystem of the Linux

kernel. A local guest user with access to PIT i/o ports could exploit this

flaw to cause a denial of service (crash) on the host. (CVE-2014-3611)

Lars Bull and Nadav Amit reported a flaw in how KVM (the Kernel Virtual

Machine) handles noncanonical writes to certain MSR registers. A privileged

guest user can exploit this flaw to cause a denial of service (kernel

panic) on the host. (CVE-2014-3610)

Andy Lutomirski discovered an information leak in the Linux...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service local exploit kernel issue ubuntu

Update Instructions

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

Ubuntu 10.04 LTS:
  linux-image-2.6.32-375-ec2      2.6.32-375.92

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-2491-1

CVE-2014-3610, CVE-2014-3611, CVE-2014-8133, CVE-2014-9322,

CVE-2014-9420

Severity
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February 04, 2015

Topics%20covered

Topics Covered

security advisory denial of service local exploit kernel issue ubuntu

Package Information

https://launchpad.net/ubuntu/+source/linux-ec2/2.6.32-375.92

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