Technical information leak - Logs
Description
The application has an HTML file that displays a LOG of the system. In the event that this page is accessible by users, they will be able to know information about the system.
Impact
Understand how the system works from the messages stored in the Log and generate an attack against the system based on this knowledge.
Recommendation
Avoid exposing system information in files that can be accessed by third parties.
Threat
External attacker from the Internet.
Expected Remediation Time
⌚ 30 minutes.
Score
Default score using CVSS 3.1. It may change depending on the context of the vulnerability.
Base
- Attack vector: L
- Attack complexity: L
- Privileges required: N
- User interaction: N
- Scope: U
- Confidentiality: L
- Integrity: N
- Availability: N
Temporal
- Exploit code madurity: P
- Remediation level: O
- Report confidence: U
Result
- Vector string: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:O/RC:U
- Score:
- Base: 4.0
- Temporal: 3.3
- Severity:
- Base: Medium
- Temporal: Low
Code Examples
Compliant code
Delete all logging functions in the production source code
Non compliant code
The source code contains a file that could potentially display system logs
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<script type="text/javascript">
(function () {
var old = system.log;
var logger = document.getElementById('log');
old = function (message) {
if (typeof message == 'object') {
logger.innerHTML += (JSON && JSON.stringify ? JSON.stringify(message) : message) + '<br />';
} else {
logger.innerHTML += message + '<br />';
}
}
})();
</script>
</body>
</html>
Requirements
Search for vulnerabilities in your apps for free with our automated security testing! Start your 21-day free trial and discover the benefits of our Continuous Hacking Machine Plan. If you prefer a full service that includes the expertise of our ethical hackers, don't hesitate to contact us for our Continuous Hacking Squad Plan.