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Ubuntu 10.04 LTS: USN-1664-1 Critical: linux-ec2 Firewall Bypass

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Calendar Grey December 13, 2012
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Ubuntu Security Notice USN-1665-1 tackles a severe vulnerability in the ec2 kernel that permits unauthorized access through the firewall.
The system's firewall could be bypassed by a remote attacker.

Summary

The system's firewall could be bypassed by a remote attacker.

Software Description:

- linux-ec2: Linux kernel for EC2

Details:

Zhang Zuotao discovered a bug in the Linux kernel's handling of overlapping

fragments in ipv6. A remote attacker could exploit this flaw to bypass

firewalls and initial new network connections that should have been blocked

by the firewall.

Topics%20covered

Topics Covered

security advisory critical remote access ubuntu linux kernel bypass ec2

Update Instructions

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

Ubuntu 10.04 LTS:
  linux-image-2.6.32-350-ec2      2.6.32-350.58

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

References

https://ubuntu.com/security/notices/USN-1664-1

CVE-2012-4444

Severity
critical
Lowest
Low
Medium
High
Critical

December 13, 2012

Topics%20covered

Topics Covered

security advisory critical remote access ubuntu linux kernel bypass ec2

Package Information

https://launchpad.net/ubuntu/+source/linux-ec2/2.6.32-350.58

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