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Multiple Vendor BSD pppd Arbitrary File Permission Modification Race Condition Vulnerability

A vulnerability has been reported in some versions of the pppd daemon included with multiple BSD distributions.

A race condition error in the code may result in the pppd process changing the file permissions on an arbitrary system file. pppd will generally run as a privileged user.

This issue has been reported in OpenBSD versions 3.0 and 3.1. Earlier versions of OpenBSD may share this vulnerability, this has not however been confirmed.