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Ubuntu 10.04 LTS USN-1534-1: EC2 Kernel Crash and Access Risks

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Calendar Grey August 10, 2012
Scroller Ubuntu
The latest Ubuntu Security Notice USN-1534-1 deals with critical kernel vulnerabilities on EC2 platforms, potentially impacting overall system reliability.
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:

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)

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 kernel issue ubuntu system crash administrative access ec2

Update Instructions

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

Ubuntu 10.04 LTS:
  linux-image-2.6.32-347-ec2      2.6.32-347.52

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-1534-1

CVE-2012-2136, CVE-2012-2390

Severity
critical
Lowest
Low
Medium
High
Critical

August 10, 2012

Topics%20covered

Topics Covered

security advisory kernel issue ubuntu system crash administrative access ec2

Package Information

https://launchpad.net/ubuntu/+source/linux-ec2/2.6.32-347.52

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