Ubuntu Security Notice 284-1: Paul Jakma discovered that Quagga’s ripd daemon did not properly handle authentication of RIPv1 requests. If the RIPv1 protocol had been disabled, or authentication for RIPv2 had been enabled, ripd still replied to RIPv1 requests, which could lead to information disclosure.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/46337/USN-284-1.txt
Source: https://packetstormsecurity.com/files/46337/Ubuntu-Security-Notice-284-1.html