-view-php-3a-2f-2ffilter-2fread-3dconvert.base64 Encode-2fresource-3d-2froot-2f.aws-2fcredentials Jun 2026

else echo "Resource not found or access denied.";

Example output when the attack succeeds:

Use code with caution.

Use AWS IAM Roles Anywhere to securely exchange short-lived tokens instead of storing static master keys. 4. Deploy a Web Application Firewall (WAF) else echo "Resource not found or access denied

When exploiting a standard LFI vulnerability (e.g., ?page=/root/.aws/credentials ), PHP attempts to render or execute the target file. If the file contains PHP tags, the server executes the code. If it contains plain text or configuration syntax, the server may throw an error, fail to display the content, or execute it incorrectly.

The request seems to be attempting to access sensitive credentials stored in an AWS credentials file located at /root/.aws/credentials . The use of filter=read and convert=base64_encode suggests that the attacker may be trying to read and encode the contents of the file.

– The response contains a base64 string (e.g., W2RlZmF1bHRdCmF3c19hY2Nlc3Nfa2V5X2lkID0gQUtJQUlPU0ZPRE5ON0VYQU1QTEUK... ). The attacker copies this string. Deploy a Web Application Firewall (WAF) When exploiting

On Linux servers running AWS-managed applications or commands via the root user, this specific file contains plaintext AWS access keys: aws_access_key_id aws_secret_access_key aws_session_token (if temporary credentials are used) How the Attack Works

But the AWS credentials file is particularly valuable because it grants cloud access that often goes unnoticed until the billing alarm sounds.

Even with a prefix, the attacker can use php://filter to bypass the path. The full resource path in the filter ( /root/.aws/credentials ) overrides the prefix. The request seems to be attempting to access

: This is a PHP wrapper designed to allow the application of filters to a stream during the opening of a file. It is commonly used in file inclusion vulnerabilities to read PHP files rather than executing them 1.

:

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The resource= parameter specifies the absolute path of the file the attacker wants to read. In this payload, the target is /root/.aws/credentials .

: Never pass user-supplied input directly into file-inclusion functions like include() , require() , file_get_contents() , or readfile() .