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USN-459-2: pptpd regression

21 May 2007

pptpd regression



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
  • bcrelay - 1.2.3-1ubuntu0.2
  • pptpd - 1.2.3-1ubuntu0.2

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