include::../description.adoc[]

include::../ask-yourself.adoc[]

include::../recommended.adoc[]

== Sensitive Code Example

Arguments like `-delete` or `-exec` for the `find` command can alter the expected behavior and result in vulnerabilities:
----
$input = $_GET['input'];
system('/usr/bin/find ' . escapeshellarg($input)); // Sensitive
----

== Compliant Solution

Use an allow-list to restrict the arguments to trusted values:
[source,php]
----
$input = $_GET['input'];
if (in_array($input, $allowed, true)) {
  system('/usr/bin/find ' . escapeshellarg($input));
}
----

include::../see.adoc[]

ifdef::env-github,rspecator-view[]

'''
== Implementation Specification
(visible only on this page)

include::../message.adoc[]


'''
endif::env-github,rspecator-view[]