USN-459-2: pptpd regression

21 May 2007

pptpd vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 6.06 LTS

Software Description


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.

Update instructions

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

Ubuntu 6.06 LTS
bcrelay - 1.2.3-1ubuntu0.2
pptpd - 1.2.3-1ubuntu0.2

To update your system, please follow these instructions:

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