![]() ![]() As a workaround, do not set any `IgnoreIP` `IgnoreCIDR` for older versions.Īuthorization Bypass Through User-Controlled Key vulnerability in Apache ZooKeeper. This old code was arranged to allow older NGINX versions to also support `IgnoreIP` `IgnoreCIDR` when multiple reverse proxies were present. An issue present starting in version 1.3 and prior to version 1.6 allows someone to bypass the WAF when a malicious `X-Forwarded-For` IP matches `IgnoreIP` `IgnoreCIDR` rules. NAXSI is an open-source maintenance web application firewall (WAF) for NGINX. As a result, IPv6 fragments may bypass pf firewall rules written on the assumption all fragments have been reassembled and, as a result, be forwarded or processed by the host. Instead a packet with multiple IPv6 fragment headers would unexpectedly be interpreted as a fragmented packet, rather than as whatever the real payload is. That is, a packet with multiple fragment extension headers would not be recognized as the correct ultimate payload. In pf packet processing with a 'scrub fragment reassemble' rule, a packet containing multiple IPv6 fragment headers would be reassembled, and then immediately processed.
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