After ppp installation the pppd has 4511 privileges and belongs to 'root:root'. It would be better to have execution permission limited to the group members by default - there's a 'dialout' group which probably can be used for this purpose. It's not a problem to this by hand but every update will of course 'reset' all changes and this creates a potential security risk.
You've already filed this once. *** This bug has been marked as a duplicate of 142938 ***
sorry - I hit reload on that page...