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

Imagine a web application that allows users to view reports from a specific directory: https://example.com/show_report?report=2024-01-01.pdf

Most modern WAFs (ModSecurity, AWS WAF, Cloudflare, etc.) have rules for path traversal. A typical alert may look like:

: Deploy a Web Application Firewall (WAF) with pre-configured rules to detect and block common path traversal patterns. -file-..-2F..-2F..-2F..-2Fhome-2F-2A-2F.aws-2Fcredentials

# Then process the path import os actual_path = os.path.join('/', decoded_path)

Do you currently use or IAM Roles for your application's cloud access? Imagine a web application that allows users to

Web application firewalls (WAFs) often block literal ../ strings. Attackers bypass these filters by encoding characters. In this specific payload, -2F- or %2F represents the forward slash ( / ), and -2A- or %2A represents the wildcard asterisk ( * ).

Forty-three files came back. Every engineer in the company. All readable. Web application firewalls (WAFs) often block literal

: Replace all instances of 2F with / .