A city blocks a short list of dangerous extensions but does not normalize case, double extensions, or alternate handlers. What is the sound assessment takeaway?
Select an answer to reveal the explanation.
Short Explanation
A No Trespassing sign that only names three costumes will not stop every costume party. Extension blacklists miss renames, case tricks, and handler quirks. Test carefully under RoE and recommend allowlists — do not turn the finding into a public bypass cookbook.
Full Explanation
Filename blacklists are inherently incomplete against alternate extensions, casing, double extensions, and platform-specific handlers. Defensible upload security relies on allowlisted types, content verification, and safe storage rather than chasing every bypass string. During CPTS-style testing, demonstrate the weakness class within authorized bounds without publishing exploit recipes as the answer. TLS or DNS issues are unrelated to this control failure.