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Ubuntu 10.04 LTS USN-1239-1 Critical: Multiple Kernel Flaws

ubuntu
Calendar Grey October 25, 2011
Scroller Ubuntu
Resolved various kernel vulnerabilities in Ubuntu 10.04 LTS, mitigating risks related to service interruptions and unauthorized data access.
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:

Ryan Sweat discovered that the kernel incorrectly handled certain VLAN

packets. On some systems, a remote attacker could send specially crafted

traffic to crash the system, leading to a denial of service.

(CVE-2011-1576)

Vasiliy Kulikov and Dan Rosenberg discovered that ecryptfs did not

correctly check the origin of mount points. A local attacker could exploit

this to trick the system into unmounting arbitrary mount points, leading to

a denial of service. (CVE-2011-1833)

Vasiliy Kulikov discovered that taskstats did not enforce access

restrictions. A local attacker could exploit this to read certain

information, leading to a loss of privacy. (CVE-2011-2494)

Vasiliy Kulikov discovered that /proc/PID/io did not enforce access

restrictions. A local attacker could exploit this to read certain

information, leading to a loss of privacy. (CVE-201...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory Ubuntu kernel system update Denial of Service data exposure

Update Instructions

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

Ubuntu 10.04 LTS:
  linux-image-2.6.32-319-ec2      2.6.32-319.39

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-1239-1

CVE-2011-1576, CVE-2011-1833, CVE-2011-2494, CVE-2011-2495,

CVE-2011-2497, CVE-2011-2695, CVE-2011-2699, CVE-2011-2905,

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

Severity
critical
Lowest
Low
Medium
High
Critical

October 25, 2011

Topics%20covered

Topics Covered

security advisory Ubuntu kernel system update Denial of Service data exposure

Package Information

https://launchpad.net/ubuntu/+source/linux-ec2/2.6.32-319.39

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