Fetch-url-file-3a-2f-2f-2froot-2f.aws-2fconfig Jun 2026
echo "[default]" >> /tmp/fake/.aws/config python3 -m http.server --directory /tmp/fake
: Security researchers from platforms like PortSwigger note that attackers often target these config files first to confirm they have file-read capabilities on the system.
Deep Dive into "fetch-url-file-3A-2F-2F-2Froot-2F.aws-2Fconfig" fetch-url-file-3A-2F-2F-2Froot-2F.aws-2Fconfig
The target of this payload is the default configuration file for the Amazon Web Services (AWS) Command Line Interface (CLI) under the root user profile. Target File Typical Contents Impact of Exposure Default AWS regions, output formats, and IAM role profiles.
<?php $url = $_GET['url']; $content = file_get_contents($url); preg_match('/<title>(.*?)<\/title>/', $content, $matches); echo $matches[1]; ?> echo "[default]" >> /tmp/fake/
The token uses URL percent-encoding with hyphens replacing percent-encoding notation. Convert segments:
If you need help building defenses against this vector, tell me: The triple slash file:/// indicates an absolute path
This is a Uniform Resource Identifier (URI) pointing to the local filesystem. The file:// scheme is used to access files on the local machine. The triple slash file:/// indicates an absolute path on Unix-like systems – the root directory / followed by root/.aws/config . In other words, this URI directly requests the AWS configuration file belonging to the root user.
Once inside the AWS environment, attackers can escalate privileges, read sensitive S3 buckets, deploy malicious resources, or exfiltrate databases. 4. Vulnerable Code Example (PHP)
The string is a raw, URL-encoded exploit payload used by penetration testers and cybercriminals to target Server-Side Request Forgery (SSRF) vulnerabilities. Decoded, the string represents a command or target parameter intended to force a server to fetch the local file: file:///root/.aws/config .
