CVE-2018-5381

El demonio Quagga BGP (bgpd), en versiones anteriores a la 1.2.3, tiene un error en su análisis de "Capabilities" en los mensajes BGP OPEN, en la función bgp_packet.c:bgp_capability_msg_parse. El analizador puede entrar en un bucle infinito o invalidar capacidades si una capacidad Multi-Protocol no tiene un AFI/SAFI reconocido, lo que provocaría una denegación de servicio (DoS).

It was discovered that a double-free vulnerability existed in the Quagga BGP daemon when processing certain forms of UPDATE message. A remote attacker could use this to cause a denial of service or possibly execute arbitrary code. It was discovered that the Quagga BGP daemon did not properly bounds check the data sent with a NOTIFY to a peer. An attacker could use this to expose sensitive information or possibly cause a denial of service. This issue only affected Ubuntu 17.10. Various other issues were also addressed.