36 lines
836 B
Plaintext
36 lines
836 B
Plaintext
== How to fix it in Core PHP
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=== Code examples
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The following code is vulnerable to SSRF as it opens a URL defined by untrusted data.
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==== Noncompliant code example
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[source,php,diff-id=1,diff-type=noncompliant]
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----
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$host = $_GET['host'];
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$url = "https://$host/.well-known/openid-configuration";
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$ch = curl_init($url); // Noncompliant
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curl_exec($ch);
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----
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==== Compliant solution
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[source,php,diff-id=1,diff-type=compliant]
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----
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$allowedHosts = ["trusted1" => "trusted1.example.com", "trusted2" => "trusted2.example.com"];
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$host = $allowedHosts[$_GET['host']];
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$url = "https://$host/.well-known/openid-configuration";
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$ch = curl_init($url);
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curl_exec($ch);
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----
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include::../../common/fix/how-does-this-work.adoc[]
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The compliant code example uses such an approach.
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=== Pitfalls
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include::../../common/pitfalls/starts-with.adoc[]
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