Ubuntu Security Notice USN-459-2
21st May, 2007
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 6.06 LTS
USN-459-1 fixed vulnerabilities in pptpd. However, a portion of the fix
caused a regression in session establishment under Dapper for certain
PPTP clients. This update fixes the problem.
We apologize for the inconvenience.
Original advisory details:
A flaw was discovered in the PPTP tunnel server. Remote attackers could
send a specially crafted packet and disrupt established PPTP tunnels,
leading to a denial of service.
The problem can be corrected by updating your system to the following package version:
- Ubuntu 6.06 LTS:
- bcrelay 1.2.3-1ubuntu0.2
- pptpd 1.2.3-1ubuntu0.2
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