_verified_ - -file-..-2f..-2f..-2f..-2fhome-2f-2a-2f.aws-2fcredentials

To help secure your environment against path traversal vulnerabilities,js) or discuss how to audit your AWS environment for ? Share public link

In a typical Linux system, * would be expanded by the shell or application logic to match any username (e.g., ubuntu , ec2-user , admin , user ). So the attacker is trying to read credentials for on the system.

@GetMapping("/file") public ResponseEntity<Resource> getFile(@RequestParam String path) Resource file = new FileSystemResource("/uploads/" + path); // missing validation

Let's dissect the path into its components: -file-..-2F..-2F..-2F..-2Fhome-2F-2A-2F.aws-2Fcredentials

The -file-..-2F..-2F..-2F..-2Fhome-2F-2A-2F.aws-2Fcredentials path appears to be an attempt to access sensitive AWS credentials. It's essential to be cautious when dealing with such cryptic paths and to ensure that your AWS credentials are stored securely.

The .aws/credentials file stores and Secret Access Keys for the AWS Command Line Interface (CLI) and SDKs. A typical entry looks like:

: This represents the wildcard character ( * ). If the web server or application layer supports wildcard expansion during file retrieval, this allows the attacker to search across all user folders without knowing the exact username. To help secure your environment against path traversal

: Use IAM Roles for Service Accounts (IRSA) or ECS Task Roles to inject temporary credentials into container environments dynamically. 3. Enforce IMDSv2

// Secure approach using an allowlist const safeFiles = 'terms': 'public/terms.txt', 'privacy': 'public/privacy.txt' ; app.get('/view-file', (req, res) => const fileId = req.query.file; const filePath = safeFiles[fileId]; if (!filePath) return res.status(400).send('Invalid file requested.'); res.sendFile(filePath); ); Use code with caution. 2. Sanitize and Validate Inputs

If using IAM roles, ensure your instances use rather than the legacy IMDSv1. IMDSv2 utilizes session-oriented requests, preventing attackers from SSRF (Server-Side Request Forgery) or local file read vulnerabilities to scrape metadata tokens easily. 3. Secure the Application Code Fix file handling vulnerabilities in the application layer: A typical entry looks like: : This represents

..-2F is a URL-encoded version of ../ , used to navigate up the directory tree.

The risks associated with this vulnerability are significant. An attacker with access to AWS credentials can:

: If you suspect this payload was successfully executed against your environment, rotate your AWS access keys immediately.

/file/../../../../../../../../home/*/.aws/credentials

To mitigate and prevent the exploitation of this vulnerability: