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[stable22] Improve local IP detection #33355

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Merged
PVince81 merged 8 commits into from
Aug 3, 2022
Merged

[stable22] Improve local IP detection #33355

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c0be5cc
Improve local IP detection
come-nc Jun 27, 2022
4b2fc65
Refactor local IP if and set strict to true for in_array
come-nc Jun 28, 2022
81c18a8
Check for local IPs nested in IPv6 as well
come-nc Jun 28, 2022
f4988d8
Use Symfony IpUtils to check for local IP ranges
come-nc Jul 12, 2022
f1fdc90
Copy IpUtils from Symfony to avoid new dependency on backport
come-nc Aug 1, 2022
6de71bd
Align copied file with our code style
come-nc Aug 1, 2022
3b42eb0
Remove call to undefined function, fix typing
come-nc Aug 1, 2022
e75a4d9
Fix autoloader
come-nc Aug 1, 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 @backportbot-nextcloud
come-nc authored and backportbot-nextcloud[bot] committed Jul 26, 2022
commit 81c18a832ff63af0b31a98d68be2b387baea0f43
4 changes: 3 additions & 1 deletion lib/private/Http/Client/LocalAddressChecker.php
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Expand Up @@ -53,7 +53,9 @@ 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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