1. Ubuntu Security Notices
  2. USN-867-1

USN-867-1: Ntp vulnerability

Publication date

8 December 2009

Overview

Ntp vulnerability

Releases

Packages

Details

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.

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.

Update instructions

In general, a standard system upgrade is sufficient to effect the necessary changes.

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
9.10 karmic ntp –  1:4.2.4p6+dfsg-1ubuntu5.1
9.04 jaunty ntp –  1:4.2.4p4+dfsg-7ubuntu5.2
8.10 intrepid ntp –  1:4.2.4p4+dfsg-6ubuntu2.4
8.04 hardy ntp –  1:4.2.4p4+dfsg-3ubuntu2.3
6.06 dapper ntp-server –  1:4.2.0a+stable-8.1ubuntu6.3
ntp –  1:4.2.0a+stable-8.1ubuntu6.3

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References

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