Closed mkorkalo closed 2 years ago
Hmm, yeah, it looks like the popular IPv6 regex from this StackOverflow answer does not handle reduced addresses well.
(([0-9a-fA-F]{1,4}:){7,7}[0-9a-fA-F]{1,4}|([0-9a-fA-F]{1,4}:){1,7}:|([0-9a-fA-F]{1,4}:){1,6}:[0-9a-fA-F]{1,4}|([0-9a-fA-F]{1,4}:){1,5}(:[0-9a-fA-F]{1,4}){1,2}|([0-9a-fA-F]{1,4}:){1,4}(:[0-9a-fA-F]{1,4}){1,3}|([0-9a-fA-F]{1,4}:){1,3}(:[0-9a-fA-F]{1,4}){1,4}|([0-9a-fA-F]{1,4}:){1,2}(:[0-9a-fA-F]{1,4}){1,5}|[0-9a-fA-F]{1,4}:((:[0-9a-fA-F]{1,4}){1,6})|:((:[0-9a-fA-F]{1,4}){1,7}|:)|fe80:(:[0-9a-fA-F]{0,4}){0,4}%[0-9a-zA-Z]{1,}|::(ffff(:0{1,4}){0,1}:){0,1}((25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])\.){3,3}(25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])|([0-9a-fA-F]{1,4}:){1,4}:((25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])\.){3,3}(25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9]))
But a comment on the answer does appear to provide a regex that does work well
(fe80:(:[0-9a-fA-F]{0,4}){0,4}%[0-9a-zA-Z]{1,}|([0-9a-fA-F]{1,4}:){1,2}(:[0-9a-fA-F]{1,4}){1,5}|([0-9a-fA-F]{1,4}:){1,3}(:[0-9a-fA-F]{1,4}){1,4}|[0-9a-fA-F]{1,4}:((:[0-9a-fA-F]{1,4}){1,6})|([0-9a-fA-F]{1,4}:){1,4}(:[0-9a-fA-F]{1,4}){1,3}|([0-9a-fA-F]{1,4}:){1,5}(:[0-9a-fA-F]{1,4}){1,2}|([0-9a-fA-F]{1,4}:){1,6}:[0-9a-fA-F]{1,4}|([0-9a-fA-F]{1,4}:){1,7}:|([0-9a-fA-F]{1,4}:){7,7}[0-9a-fA-F]{1,4}|([0-9a-fA-F]{1,4}:){1,4}:((25[0-5]|2[0-4][0-9]|1{0,1}[0-9]{0,1}[0-9])\.{3,3})(25[0-5]|2[0-4][0-9]|1{0,1}[0-9]{0,1}[0-9])|::(ffff(:0{1,4}){0,1}:){0,1}((25[0-5]|2[0-4][0-9]|1{0,1}[0-9]{0,1}[0-9])\.{3,3})(25[0-5]|2[0-4][0-9]|1{0,1}[0-9]{0,1}[0-9])|:((:[0-9a-fA-F]{1,4}){1,7}|:))
I'll swap them out and push out a release.
Okie dokes, fixed and released in version 0.3.3
Thanks for taking the time out of your day to report this <3
This rule is valid in suricata, but fails parsing here.