CVE-2012-5363: 
Linux Debian vulnerability analysis and mitigation

The IPv6 implementation in FreeBSD and NetBSD (versions from 2012 and earlier) contains a vulnerability related to ICMPv6 Neighbor Solicitation messages. This vulnerability is tracked as CVE-2012-5363 and is distinct from the previously identified CVE-2011-2393. The flaw allows remote attackers to cause a denial of service condition through a flood of ICMPv6 Neighbor Solicitation messages (MITRE CVE, OSS Security).

The vulnerability involves the processing of ICMPv6 Neighbor Solicitation messages in the IPv6 implementation. When the system receives a flood of these messages, it can lead to a denial of service condition. This issue was identified as being potentially different in root cause between FreeBSD and NetBSD systems, despite similar observed behavior (OSS Security).

The primary impact of this vulnerability is the potential for denial of service attacks against affected FreeBSD and NetBSD systems. When successfully exploited, attackers can disrupt the normal operation of the target system through flooding it with ICMPv6 Neighbor Solicitation messages (MITRE CVE).