A NULL pointer dereference flaw was found in the way Quagga bgpd daemon processed malformed route information. A configured BGP peer could crash bgpd on a target system via a BGP message with specially-crafted value of BGP Extended Communities attribute.
A security flaw was found in the way Quagga bgpd daemon processed certain route metrics information. A configured BGP peer could use this flaw to send a BGP message with specially-crafted value of AS-path attribute, which would cause the bgpd daemon on all systems on the route the message travels to reset the BGP session.
A denial of service flaw was found in the way the ospfd daemon of the Quagga routing suire processes malformed Hello packets (not complete Hello packets of Hello packets with invalid OSPFv2 header type). A configured OSPF peer, could use this flaw to cause the master OSPF daemon (ospfd) to crash.
A heap-based buffer overflow flaw was found in the way bgpd daemon of the Quagga routing suite processed BGP UPDATE messages containing unknown ASPATH in Extended Communities Path Attribute. A configured BGP peer could use this flaw to cause the master BGP daemon (bgpd) to crash, or, potentially execute arbitrary code with the privileges of the user running bgpd.
The OSPFv3 implementation in ospf6d in Quagga before 0.99.19 allows remote attackers to cause a denial of service (out-of-bounds memory access and daemon crash) via a Link State Update message with an invalid IPv6 prefix length.
The ospfflood function in ospfflood.c in ospfd in Quagga before 0.99.19 allows remote attackers to cause a denial of service (daemon crash) via an invalid Link State Advertisement (LSA) type in an IPv4 Link State Update message.
The ospf6lsaischanged function in ospf6lsa.c in the OSPFv3 implementation in ospf6d in Quagga before 0.99.19 allows remote attackers to cause a denial of service (assertion failure and daemon exit) via trailing zero values in the Link State Advertisement (LSA) header list of an IPv6 Database Description message.
Buffer overflow in the ospflsupdlistlsa function in ospfpacket.c in the OSPFv2 implementation in ospfd in Quagga before 0.99.20.1 allows remote attackers to cause a denial of service (assertion failure and daemon exit) via a Link State Update (aka LS Update) packet that is smaller than the length specified in its header.
The BGP implementation in bgpd in Quagga before 0.99.20.1 does not properly use message buffers for OPEN messages, which allows remote attackers to cause a denial of service (assertion failure and daemon exit) via a message associated with a malformed Four-octet AS Number Capability (aka AS4 capability).