Robin Park and Dmitri Vinokurov discovered a logic error in ntpd. A remote attacker could send a crafted NTP mode 7 packet with a spoofed IP address of an affected server and cause a denial of service via CPU and disk resource consumption.
The problem can be corrected by updating your system to the following package versions:
8 December 2009
A security issue affects these releases of Ubuntu and its derivatives:
Robin Park and Dmitri Vinokurov discovered a logic error in ntpd. A remote attacker could send a crafted NTP mode 7 packet with a spoofed IP address of an affected server and cause a denial of service via CPU and disk resource consumption.
The problem can be corrected by updating your system to the following package versions:
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
In general, a standard system upgrade is sufficient to effect the necessary changes.
Vulmon