The URL-encoded string: -file-..-2F..-2F..-2F..-2Fhome-2F-2A-2F.aws-2Fcredentials
Let's outline:
No. That wasn’t possible. Those were his old keys. The ones rotated after the breach they never found.
I can provide or configuration guides to protect your specific setup. Share public link -file-..-2F..-2F..-2F..-2Fhome-2F-2A-2F.aws-2Fcredentials
: Ensure the web server user does not have permission to read sensitive home directories or configuration files.
: The server executes the path, climbs up to the /home/ directory, locates the .aws/credentials file, and displays the plain-text keys directly on the attacker's screen. Why URL Encoding is Used
In our encoded case, the attacker is trying to bypass naïve filters that might remove ../ by using URL encoding %2F (or in the given string, -2F as a hypothetical custom encoding) to evade detection. The URL-encoded string: -file-
Real-World Attack Scenarios: How attackers probe for this vulnerability. Using tools like Burp Suite, curl, or automated scanners. Include example HTTP request: GET /vulnerable/page?file=../../../../home/*/.aws/credentials (with encoding).
Instead of manual files, AWS provides an official IAM Credentials Report that lists the status of all credentials in your account (passwords, access keys, MFA status). Sign in to the AWS IAM Console . In the navigation pane, choose Credential report .
The vulnerability arises when an attacker gains access to a system or a web application that stores AWS credentials in a file located at ~/.aws/credentials . This file typically contains sensitive information, including the AWS access key ID and secret access key. If an attacker can read or modify this file, they can use the credentials to access AWS resources, potentially leading to unauthorized data access, modification, or even deletion. The ones rotated after the breach they never found
If an attacker successfully "posts" or injects this string into a vulnerable web application, the server might accidentally display the contents of that file. This would give the attacker full control over the victim's Amazon Web Services (AWS) infrastructure. Why You Might Be Seeing This Security Logs
If an attacker sends a request to /view-file?file=../../../../home/ubuntu/.aws/credentials , the path.join function may resolve the path outside of the intended public directory, reading the sensitive file from the host operating system instead. Remediation and Mitigation Strategies
Ensure the web server user account (e.g., www-data or nginx ) has minimal file system permissions. A web server should never have read access to the /home/ directory or other users' private files. 4. Leverage Cloud IAM Roles Over Static Credentials
The $500,000 Path: How Traversal Vulnerabilities Leak AWS Credentials
Attackers encode characters like slashes ( / ) into hex fragments ( -2F or %2F ) to bypass basic security filters. Many poorly programmed Web Application Firewalls (WAFs) only look for literal ../ strings. Encoding the characters allows the malicious payload to slip past simple string-matching defense mechanisms. Once the payload passes the firewall, the backend web server decodes it and executes the dangerous file read. Prevention and Mitigation