Updated quagga packages fix security vulnerability:
A denial of dervice vulnerability have been found in BGP daemon from Quagga routing software (bgpd): if the following conditions are satisfied:
then BGP message packets that are big enough cause bgpd to crash. The situation when the conditions above are satisfied is quite common. Moreover, it is easy to craft a packet which is much "bigger" than a typical packet, and hence such crafted packet can much more likely cause the crash (CVE-2016-4049).