Return of version downgrade attack in the era of TLS 1.3
Sang‐Tae Lee, Youngjoo Shin, Junbeom Hur · 2020
Transport Layer Security (TLS) protocol is often vulnerable to version downgrade attacks, where a man-in-the-middle attacker interferes with the handshake protocol and leads the communicating parties to fall back from a higher version of TLS to lower ones, which are typically provided for backward compatibility.