New Opossum Attack Allows Hackers to Compromise Secure TLS Channels with Malicious Messages

The new Opossum attack is a sophisticated cross-protocol application layer desynchronization vulnerability that compromises TLS-based communications.  This attack exploits fundamental differences between implicit and opportunistic TLS implementations, affecting critical protocols including HTTP, FTP, POP3, SMTP, LMTP, and NNTP.  By leveraging man-in-the-middle positioning, attackers can inject unexpected messages into secure channels, causing persistent desynchronization between clients […]

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