CyberRota Analysis
AI-GeneratedExchange servers utilizing DTLS 1.2 are vulnerable to an attack where an out-of-order ChangeCipherSpec message can be accepted before the ClientKeyExchange is sent, allowing an attacker to impersonate the server during the handshake process. This vulnerability can lead to unauthorized data transmission, particularly in man-in-the-middle scenarios, where the attacker can exploit the protocol's weaknesses without needing to know the Pre Shared Key. Organizations using Exchange should prioritize patching this vulnerability to safeguard against potential exploitation.
Public Exploit Signal
A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.
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Original NVD Description
A (D)TLS 1.2 client can accept a ChangeCipherSpec message before it has sent its ClientKeyExchange. No master secret has been derived at that point, so the client installs read keys derived from a known (deterministic) key and checks the server's Finished against that same key. An out-of-order ChangeCipherSpec can therefore be used by an attacker to complete the handshake in place of the server and send data the client accepts as authentic. The client's own traffic still uses correctly derived keys, so the attacker cannot read it, and the genuine server never completes the handshake. DTLS 1.2 clients are exposed because a datagram read can deliver the out-of-order records on its own. TLS 1.2 clients are exposed when the application supplies received bytes with wolfSSL_inject() or enables read ahead. For certificate suites, the attacker must be in a man-in-the-middle position. For PSK (Pre Shared Key) connections, any fake server can succeed without knowing the PSK.
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