FreeBSD: VID-e15a22ce-f16f-446b-9ca7-6859350c2e75 (CVE-2018-5378): quagga -- several security issues

Quagga reports: The Quagga BGP daemon, bgpd, does not properly bounds check the data sent with a NOTIFY to a peer, if an attribute length is invalid. Arbitrary data from the bgpd process may be sent over the network to a peer and/or it may crash. The Quagga BGP daemon, bgpd, can double-free memory when processing certain forms of UPDATE message, containing cluster-list and/or unknown attributes. The Quagga BGP daemon, bgpd, can overrun internal BGP code-to-string conversion tables used for debug by 1 pointer value, based on input. The Quagga BGP daemon, bgpd, can enter an infinite loop if sent an invalid OPEN message by a configured peer.