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Ubuntu 10.04: USN-1661-1 Critical: Firewall Bypass Risk

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Calendar Grey December 11, 2012
Scroller Ubuntu
Ubuntu Security Notice USN-1661-1 highlights a critical kernel flaw allowing remote attackers to bypass firewalls in the 10.04 LTS version. Update is essential.
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: Linux kernel

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 remote attack kernel issue ubuntu firewall bypass

Update Instructions

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

Ubuntu 10.04 LTS:
  linux-image-2.6.32-45-386       2.6.32-45.101
  linux-image-2.6.32-45-generic   2.6.32-45.101
  linux-image-2.6.32-45-generic-pae  2.6.32-45.101
  linux-image-2.6.32-45-ia64      2.6.32-45.101
  linux-image-2.6.32-45-lpia      2.6.32-45.101
  linux-image-2.6.32-45-powerpc   2.6.32-45.101
  linux-image-2.6.32-45-powerpc-smp  2.6.32-45.101
  linux-image-2.6.32-45-powerpc64-smp  2.6.32-45.101
  linux-image-2.6.32-45-preempt   2.6.32-45.101
  linux-image-2.6.32-45-server    2.6.32-45.101
  linux-image-2.6.32-45-sparc64   2.6.32-45.101
  linux-image-2.6.32-45-sparc64-smp  2.6.32-45.101
  linux-image-2.6.32-45-versatile  2.6.32-45.101
  linux-image-2.6.32-45-virtual   2.6.32-45.101

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

References

https://ubuntu.com/security/notices/USN-1661-1

CVE-2012-4444

Severity
critical
Lowest
Low
Medium
High
Critical

December 11, 2012

Topics%20covered

Topics Covered

security advisory remote attack kernel issue ubuntu firewall bypass

Package Information

https://launchpad.net/ubuntu/+source/linux/2.6.32-45.101

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