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Improve local IP detection #33031

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Merged
come-nc merged 4 commits into from
Jul 26, 2022
Merged

Improve local IP detection #33031

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bd9aff4
Improve local IP detection
come-nc Jun 27, 2022
d083043
Refactor local IP if and set strict to true for in_array
come-nc Jun 28, 2022
707b46b
Check for local IPs nested in IPv6 as well
come-nc Jun 28, 2022
c5ffd7c
Use Symfony IpUtils to check for local IP ranges
come-nc Jul 12, 2022
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Check for local IPs nested in IPv6 as well 
Signed-off-by: Côme Chilliet <[email protected]>
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@come-nc
come-nc committed Jul 12, 2022
commit 707b46bb01e67b764274fc00275e2076aeea5327
4 changes: 3 additions & 1 deletion lib/private/Http/Client/LocalAddressChecker.php
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Expand Up @@ -52,7 +52,9 @@ public function ThrowIfLocalIp(string $ip) : void {
$delimiter = strrpos($ip, ':'); // Get last colon
$ipv4Address = substr($ip, $delimiter + 1);

if (!filter_var($ipv4Address, FILTER_VALIDATE_IP, FILTER_FLAG_NO_PRIV_RANGE | FILTER_FLAG_NO_RES_RANGE)) {
if (
!filter_var($ipv4Address, FILTER_VALIDATE_IP, FILTER_FLAG_NO_PRIV_RANGE | FILTER_FLAG_NO_RES_RANGE) ||
in_array($ipv4Address, $localIps, true)) {
$this->logger->warning("Host $ip was not connected to because it violates local access rules");
throw new LocalServerException('Host violates local access rules');
}
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