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OpenSSH Terrapin attack (CVE-2023-48795)
Jan. 9, 2024, 8 a.m. |
FortiGuard Labs | FortiGuard Center - IR Advisories fortiguard.fortinet.com
The SSH transport protocol with certain OpenSSH extensions, found in OpenSSH before 9.6 and other products, allows remote attackers to bypass integrity checks such that some packets are omitted (from the extension negotiation message), and a client and server may consequently end up with a connection for which some security features have been downgraded or disabled, aka a Terrapin attack. This occurs because the SSH Binary Packet Protocol (BPP), implemented by these extensions, mishandles the handshake phase and mishandles …
attack attackers bypass client cve cve-2023-48795 end extension extensions features found integrity may message negotiation openssh packets products protocol security security features server ssh terrapin terrapin attack transport
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