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BAU-27505 Fix Server-Side Request Forgery (SSRF) / Path Traversal issues #1

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BAU-27505 Fix Server-Side Request Forgery (SSRF) / Path Traversal issues #1

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BAU-27505 Fix Server-Side Request Forgery (SSRF) / Path Traversal issues
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Iesan Remus authored and Iesan Remus committed Jun 12, 2025
commit 70bd6f7b4f3971340fbdcffa3f61356703fea4b9
26 changes: 23 additions & 3 deletions example-wrapper.php
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Original file line number Diff line number Diff line change
Expand Up @@ -166,9 +166,29 @@ public function stream_seek($offset, $whence) {

private function __getURL($path) {
$this->url = parse_url($path);
if (!isset($this->url['scheme']) || $this->url['scheme'] !== 's3') return $this->url;
if (isset($this->url['user'], $this->url['pass'])) self::setAuth($this->url['user'], $this->url['pass']);
$this->url['path'] = isset($this->url['path']) ? substr($this->url['path'], 1) : '';

// Only allow 's3' scheme
if (!isset($this->url['scheme']) || $this->url['scheme'] !== 's3') {
throw new InvalidArgumentException('Invalid scheme: only s3:// is allowed');
}

// Validate bucket name
if (
!isset($this->url['host']) ||
!preg_match('/^(?!^\d+\.\d+\.\d+\.\d+$)(?!.*\.\.)(?!.*\.$)(?!^\.)[a-z0-9]([a-z0-9.-]{1,61}[a-z0-9])?$/', $this->url['host'])
) {
throw new InvalidArgumentException('Invalid S3 bucket name');
}

// Validate path (no directory traversal)
$this->url['path'] = isset($this->url['path']) ? ltrim($this->url['path'], '/') : '';
if (strpos($this->url['path'], '..') !== false) {
throw new InvalidArgumentException('Invalid S3 object path');
}

if (isset($this->url['user'], $this->url['pass'])) {
self::setAuth($this->url['user'], $this->url['pass']);
}
}

private function __translateMode($mode) {
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