The Quagga BGP daemon (bgpd) prior to version 1.2.3 has a bug in its parsing of "Capabilities" in BGP OPEN messages, in the bgp_packet.c:bgp_capability_msg_parse function. The parser can enter an infinite loop on invalid capabilities if a Multi-Protocol capability does not have a recognized AFI/SAFI, causing a denial of service.
The product does not handle or incorrectly handles input that is not syntactically well-formed with respect to the associated specification.
The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop.
| Link | Tags |
|---|---|
| https://gogs.quagga.net/Quagga/quagga/src/master/doc/security/Quagga-2018-1975.txt | vendor advisory |
| https://usn.ubuntu.com/3573-1/ | third party advisory vendor advisory |
| https://www.debian.org/security/2018/dsa-4115 | third party advisory vendor advisory |
| http://savannah.nongnu.org/forum/forum.php?forum_id=9095 | third party advisory |
| https://security.gentoo.org/glsa/201804-17 | third party advisory vendor advisory |
| https://lists.debian.org/debian-lts-announce/2018/02/msg00021.html | third party advisory mailing list |
| http://www.kb.cert.org/vuls/id/940439 | third party advisory us government resource |
| https://cert-portal.siemens.com/productcert/pdf/ssa-451142.pdf | third party advisory mitigation |