SSH vulnerability exploitable in Terrapin attacks (CVE-2023-48795)

Security researchers have discovered a vulnerability (CVE-2023-48795) in the SSH cryptographic network protocol that could allow an attacker to downgrade the connection’s security by truncating the extension negotiation message. The Terrapin attack Terrapin is a prefix truncation attack targeting the SSH protocol. “By carefully adjusting the sequence numbers during the handshake, an attacker can remove an arbitrary amount of messages sent by the client or server at the beginning of the secure channel without the … More →

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attack attacker attacks cryptographic cryptographic attack cve don't miss extension handshake hot stuff message negotiation network numbers openssh protocol research researchers security security researchers ssh suse targeting vulnerability