Vulnerability Information
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Vulnerability Title
pf incorrectly matches different ICMPv6 states in the state table
Vulnerability Description
In ICMPv6 Neighbor Discovery (ND), the ID is always 0. When pf is configured to allow ND and block incoming Echo Requests, a crafted Echo Request packet after a Neighbor Solicitation (NS) can trigger an Echo Reply. The packet has to come from the same host as the NS and have a zero as identifier to match the state created by the Neighbor Discovery and allow replies to be generated. ICMPv6 packets with identifier value of zero bypass firewall rules written on the assumption that the incoming packets are going to create a state in the state table.
CVSS Information
N/A
Vulnerability Type
N/A
Vulnerability Title
FreeBSD 安全漏洞
Vulnerability Description
FreeBSD是FreeBSD基金会的一套类Unix操作系统。 FreeBSD存在安全漏洞，该漏洞源于ICMPv6数据包会绕过防火墙规则。
CVSS Information
N/A
Vulnerability Type
N/A