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Ubuntu 10.04 LTS USN-1421-1 Critical: Kernel Flaws Cause Denial Of Service

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Calendar Grey April 12, 2012
Scroller Ubuntu
Ubuntu 18.04 LTS offers essential improvements in system security, addressing critical flaws in software packages to reduce the likelihood of unauthorized access.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux-lts-backport-maverick: Linux kernel backport from Maverick

Details:

Sasha Levin discovered a flaw in the permission checking for device

assignments requested via the kvm ioctl in the Linux kernel. A local user

could use this flaw to crash the system causing a denial of service.

(CVE-2011-4347)

Stephan Bärwolf discovered a flaw in the KVM (kernel-based virtual

machine) subsystem of the Linux kernel. A local unprivileged user can crash

use this flaw to crash VMs causing a deny of service. (CVE-2012-0045)

H. Peter Anvin reported a flaw in the Linux kernel that could crash the

system. A local user could exploit this flaw to crash the system.

(CVE-2012-1097)

A flaw was discovered in the Linux kernel's cgroups subset. A local

attacker could use this flaw to crash the system. (CVE-2012-1146)

Topics%20covered

Topics Covered

security advisory denial of service critical kernel flaw ubuntu device permission kvm subsystem

Update Instructions

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

Ubuntu 10.04 LTS:
  linux-image-2.6.35-32-generic   2.6.35-32.68~lucid1
  linux-image-2.6.35-32-generic-pae  2.6.35-32.68~lucid1
  linux-image-2.6.35-32-server    2.6.35-32.68~lucid1
  linux-image-2.6.35-32-virtual   2.6.35-32.68~lucid1

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

References

https://ubuntu.com/security/notices/USN-1421-1

CVE-2011-4347, CVE-2012-0045, CVE-2012-1097, CVE-2012-1146

Severity
critical
Lowest
Low
Medium
High
Critical

April 12, 2012

Topics%20covered

Topics Covered

security advisory denial of service critical kernel flaw ubuntu device permission kvm subsystem

Package Information

https://launchpad.net/ubuntu/+source/linux-lts-backport-maverick/2.6.35-32.68~lucid1

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