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Fix host header normalization in intel framework.

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The way we were splitting off ports from host names could fail for IPv6
addresses.

Closes #1844.
This commit is contained in:
Robin Sommer 2021-12-21 08:49:46 +01:00
parent a7427e95bf
commit 07045ec254
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1 changed files with 2 additions and 2 deletions
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4
scripts/policy/frameworks/intel/seen/http-headers.zeek
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@ -9,8 +9,8 @@ event http_header(c: connection, is_orig: bool, name: string, value: string)
switch ( name )
{
case "HOST":
# The split is done to remove the occasional port value that shows up here (see also base script)
local host = split_string1(value, /:/)[0];
# Remove the occasional port value that shows up here.
local host = gsub(value, /:[[:digit:]]+$/, "");
if ( is_valid_ip(host) )
Intel::seen([$host=to_addr(host),
$indicator_type=Intel::ADDR,