Ubuntu Security Notice USN-867-1
8th December, 2009
ntp vulnerability
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 9.10
- Ubuntu 9.04
- Ubuntu 8.10
- Ubuntu 8.04 LTS
- Ubuntu 6.06 LTS
Software description
- ntp
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.
Update instructions
The problem can be corrected by updating your system to the following package version:
- Ubuntu 9.10:
- ntp 1:4.2.4p6+dfsg-1ubuntu5.1
- Ubuntu 9.04:
- ntp 1:4.2.4p4+dfsg-7ubuntu5.2
- Ubuntu 8.10:
- ntp 1:4.2.4p4+dfsg-6ubuntu2.4
- Ubuntu 8.04 LTS:
- ntp 1:4.2.4p4+dfsg-3ubuntu2.3
- Ubuntu 6.06 LTS:
- ntp-server 1:4.2.0a+stable-8.1ubuntu6.3
- ntp 1:4.2.0a+stable-8.1ubuntu6.3
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.