OpenSSH Terrapin attack (CVE-2023-48795)

OpenSSH Terrapin attack (CVE-2023-48795) Fortinet PSIRT Advisories Fortinet PSIRT Contact: Website: https://fortiguard.fortinet.com/faq/psirt-contact FG-IR-23-490 Final 1 1 2024-01-09T00:00:00 Current version 2024-01-09T00:00:00 2025-05-13T00:00:00 CVE-2023-48795The 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 use of sequence numbers. For example, there is an effective attack against SSH's use of ChaCha20-Poly1305 (and CBC with Encrypt-then-MAC). The bypass occurs in chacha20-poly1305@openssh.com and (if CBC is used) the -etm@openssh.com MAC algorithms. None Improper access control FortiAnalyzer 7.4.2 FortiAnalyzer 7.0.11 FortiEDR Manager 6.2.4 FortiEDR Manager 6.2.3 FortiEDR Manager 6.2.2 FortiEDR Manager 6.2.1 FortiEDR Manager 6.2.0 FortiEDR Manager 6.0.1 FortiEDR Manager 5.2.1 FortiEDR Manager 5.2.0 FortiEDR Manager 5.1.0 FortiEDR Manager 5.0.3 FortiMail 7.4.1 FortiMail 7.4.0 FortiMail 7.2.5 FortiMail 7.2.4 FortiMail 7.2.3 FortiMail 7.2.2 FortiMail 7.2.1 FortiMail 7.2.0 FortiMail 7.0.7 FortiMail 7.0.6 FortiMail 7.0.5 FortiMail 7.0.4 FortiMail 7.0.3 FortiMail 7.0.2 FortiMail 7.0.1 FortiMail 7.0.0 FortiMail 6.4.8 FortiMail 6.4.7 FortiMail 6.4.6 FortiMail 6.4.5 FortiMail 6.4.4 FortiMail 6.4.3 FortiMail 6.4.2 FortiMail 6.4.1 FortiMail 6.4.0 FortiMail 6.2.9 FortiMail 6.2.8 FortiMail 6.2.7 FortiMail 6.2.6 FortiMail 6.2.5 FortiMail 6.2.4 FortiMail 6.2.3 FortiMail 6.2.2 FortiMail 6.2.1 FortiMail 6.2.0 FortiManager 7.4.2 FortiManager 7.0.11 FortiNAC-F 7.2.5 FortiNAC-F 7.2.4 FortiNAC-F 7.2.3 FortiNAC-F 7.2.2 FortiNAC-F 7.2.1 FortiNAC-F 7.2.0 FortiNDR 7.4.2 FortiNDR 7.4.1 FortiNDR 7.4.0 FortiNDR 7.2.1 FortiNDR 7.2.0 FortiNDR 7.1.1 FortiNDR 7.1.0 FortiNDR 7.0.5 FortiNDR 7.0.4 FortiNDR 7.0.3 FortiNDR 7.0.2 FortiNDR 7.0.1 FortiNDR 7.0.0 FortiRecorder 7.0.3 FortiRecorder 7.0.2 FortiRecorder 7.0.1 FortiRecorder 7.0.0 FortiRecorder 6.4.6 FortiRecorder 6.4.5 FortiRecorder 6.4.4 FortiRecorder 6.4.3 FortiRecorder 6.4.2 FortiRecorder 6.4.1 FortiRecorder 6.4.0 FortiRecorder 6.0.12 FortiRecorder 6.0.11 FortiRecorder 6.0.10 FortiRecorder 6.0.9 FortiRecorder 6.0.8 FortiRecorder 6.0.7 FortiRecorder 6.0.6 FortiRecorder 6.0.5 FortiRecorder 6.0.4 FortiRecorder 6.0.3 FortiRecorder 6.0.2 FortiRecorder 6.0.1 FortiRecorder 6.0.0 FortiSIEM 7.1.3 FortiSIEM 7.1.2 FortiSIEM 7.1.1 FortiSIEM 7.1.0 FortiSIEM 7.0.4 FortiSIEM 7.0.3 FortiSIEM 7.0.2 FortiSIEM 7.0.1 FortiSIEM 7.0.0 FortiSIEM 6.7.10 FortiSIEM 6.7.9 FortiSIEM 6.7.8 FortiSIEM 6.7.7 FortiSIEM 6.7.6 FortiSIEM 6.7.5 FortiSIEM 6.7.4 FortiSIEM 6.7.3 FortiSIEM 6.7.2 FortiSIEM 6.7.1 FortiSIEM 6.7.0 FortiSIEM 6.6.5 FortiSIEM 6.6.4 FortiSIEM 6.6.3 FortiSIEM 6.6.2 FortiSIEM 6.6.1 FortiSIEM 6.6.0 FortiSIEM 6.5.3 FortiSIEM 6.5.2 FortiSIEM 6.5.1 FortiSIEM 6.5.0 FortiSIEM 6.4.4 FortiSIEM 6.4.3 FortiSIEM 6.4.2 FortiSIEM 6.4.1 FortiSIEM 6.4.0 FortiSIEM 6.3.3 FortiSIEM 6.3.2 FortiSIEM 6.3.1 FortiSIEM 6.3.0 FortiSIEM 6.2.1 FortiSIEM 6.2.0 FortiSIEM 6.1.2 FortiSIEM 6.1.1 FortiSIEM 6.1.0 FortiSIEM 5.4.0 FortiSIEM 5.3.3 FortiSIEM 5.3.2 FortiSIEM 5.3.1 FortiSIEM 5.3.0 FortiSOAR on-premise 7.4.2 FortiSOAR on-premise 7.4.1 FortiSOAR on-premise 7.4.0 FortiSOAR on-premise 7.3.3 FortiSOAR on-premise 7.3.2 FortiSOAR on-premise 7.3.1 FortiSOAR on-premise 7.3.0 FortiSOAR on-premise 7.2.2 FortiSOAR on-premise 7.2.1 FortiSOAR on-premise 7.2.0 FortiSOAR on-premise 7.0.3 FortiSOAR on-premise 7.0.2 FortiSOAR on-premise 7.0.1 FortiSOAR on-premise 7.0.0 FortiSOAR on-premise 6.4.4 FortiSOAR on-premise 6.4.3 FortiSOAR on-premise 6.4.1 FortiSOAR on-premise 6.4.0 FortiVoice 7.0.1 FortiVoice 7.0.0 FortiVoice 6.4.8 FortiVoice 6.4.7 FortiVoice 6.4.6 FortiVoice 6.4.5 FortiVoice 6.4.4 FortiVoice 6.4.3 FortiVoice 6.4.2 FortiVoice 6.4.1 FortiVoice 6.4.0 FortiVoice 6.0.12 FortiVoice 6.0.11 FortiVoice 6.0.10 FortiVoice 6.0.9 FortiVoice 6.0.8 FortiVoice 6.0.7 FortiVoice 6.0.6 FortiVoice 6.0.5 FortiVoice 6.0.4 FortiVoice 6.0.3 FortiVoice 6.0.2 FortiVoice 6.0.1 FortiVoice 6.0.0 FortiWeb 7.4.2 FortiWeb 7.4.1 FortiWeb 7.4.0 FortiWeb 7.2.7 FortiWeb 7.2.6 FortiWeb 7.2.5 FortiWeb 7.2.4 FortiWeb 7.2.3 FortiWeb 7.2.2 FortiWeb 7.2.1 FortiWeb 7.2.0 FortiWeb 7.0.10 FortiWeb 7.0.9 FortiWeb 7.0.8 FortiWeb 7.0.7 FortiWeb 7.0.6 FortiWeb 7.0.5 FortiWeb 7.0.4 FortiWeb 7.0.3 FortiWeb 7.0.2 FortiWeb 7.0.1 FortiWeb 7.0.0 FortiWeb 6.4.3 FortiWeb 6.4.2 FortiWeb 6.4.1 FortiWeb 6.4.0 FortiWeb 6.3.23 FortiWeb 6.3.22 FortiWeb 6.3.21 FortiWeb 6.3.20 FortiWeb 6.3.19 FortiWeb 6.3.18 FortiWeb 6.3.17 FortiWeb 6.3.16 FortiWeb 6.3.15 FortiWeb 6.3.14 FortiWeb 6.3.13 FortiWeb 6.3.12 FortiWeb 6.3.11 FortiWeb 6.3.10 FortiWeb 6.3.9 FortiWeb 6.3.8 FortiWeb 6.3.7 FortiWeb 6.3.6 FortiWeb 6.3.5 FortiWeb 6.3.4 FortiWeb 6.3.3 FortiWeb 6.3.2 FortiWeb 6.3.1 FortiWeb 6.3.0 FortiWeb 6.2.8 FortiWeb 6.2.7 FortiWeb 6.2.6 FortiWeb 6.2.5 FortiWeb 6.2.4 FortiWeb 6.2.3 FortiWeb 6.2.2 FortiWeb 6.2.1 FortiWeb 6.2.0 OpenSSH Terrapin attack (CVE-2023-48795) CVE-2023-48795 FortiAnalyzer-7.4.2 FortiAnalyzer-7.0.11 FortiEDR Manager-6.2.4 FortiEDR Manager-6.2.3 FortiEDR Manager-6.2.2 FortiEDR Manager-6.2.1 FortiEDR Manager-6.2.0 FortiEDR Manager-6.0.1 FortiEDR Manager-5.2.1 FortiEDR Manager-5.2.0 FortiEDR Manager-5.1.0 FortiEDR Manager-5.0.3 FortiMail-7.4.1 FortiMail-7.4.0 FortiMail-7.2.5 FortiMail-7.2.4 FortiMail-7.2.3 FortiMail-7.2.2 FortiMail-7.2.1 FortiMail-7.2.0 FortiMail-7.0.7 FortiMail-7.0.6 FortiMail-7.0.5 FortiMail-7.0.4 FortiMail-7.0.3 FortiMail-7.0.2 FortiMail-7.0.1 FortiMail-7.0.0 FortiMail-6.4.8 FortiMail-6.4.7 FortiMail-6.4.6 FortiMail-6.4.5 FortiMail-6.4.4 FortiMail-6.4.3 FortiMail-6.4.2 FortiMail-6.4.1 FortiMail-6.4.0 FortiMail-6.2.9 FortiMail-6.2.8 FortiMail-6.2.7 FortiMail-6.2.6 FortiMail-6.2.5 FortiMail-6.2.4 FortiMail-6.2.3 FortiMail-6.2.2 FortiMail-6.2.1 FortiMail-6.2.0 FortiManager-7.4.2 FortiManager-7.0.11 FortiNAC-F-7.2.5 FortiNAC-F-7.2.4 FortiNAC-F-7.2.3 FortiNAC-F-7.2.2 FortiNAC-F-7.2.1 FortiNAC-F-7.2.0 FortiNDR-7.4.2 FortiNDR-7.4.1 FortiNDR-7.4.0 FortiNDR-7.2.1 FortiNDR-7.2.0 FortiNDR-7.1.1 FortiNDR-7.1.0 FortiNDR-7.0.5 FortiNDR-7.0.4 FortiNDR-7.0.3 FortiNDR-7.0.2 FortiNDR-7.0.1 FortiNDR-7.0.0 FortiRecorder-7.0.3 FortiRecorder-7.0.2 FortiRecorder-7.0.1 FortiRecorder-7.0.0 FortiRecorder-6.4.6 FortiRecorder-6.4.5 FortiRecorder-6.4.4 FortiRecorder-6.4.3 FortiRecorder-6.4.2 FortiRecorder-6.4.1 FortiRecorder-6.4.0 FortiRecorder-6.0.12 FortiRecorder-6.0.11 FortiRecorder-6.0.10 FortiRecorder-6.0.9 FortiRecorder-6.0.8 FortiRecorder-6.0.7 FortiRecorder-6.0.6 FortiRecorder-6.0.5 FortiRecorder-6.0.4 FortiRecorder-6.0.3 FortiRecorder-6.0.2 FortiRecorder-6.0.1 FortiRecorder-6.0.0 FortiSIEM-7.1.3 FortiSIEM-7.1.2 FortiSIEM-7.1.1 FortiSIEM-7.1.0 FortiSIEM-7.0.4 FortiSIEM-7.0.3 FortiSIEM-7.0.2 FortiSIEM-7.0.1 FortiSIEM-7.0.0 FortiSIEM-6.7.10 FortiSIEM-6.7.9 FortiSIEM-6.7.8 FortiSIEM-6.7.7 FortiSIEM-6.7.6 FortiSIEM-6.7.5 FortiSIEM-6.7.4 FortiSIEM-6.7.3 FortiSIEM-6.7.2 FortiSIEM-6.7.1 FortiSIEM-6.7.0 FortiSIEM-6.6.5 FortiSIEM-6.6.4 FortiSIEM-6.6.3 FortiSIEM-6.6.2 FortiSIEM-6.6.1 FortiSIEM-6.6.0 FortiSIEM-6.5.3 FortiSIEM-6.5.2 FortiSIEM-6.5.1 FortiSIEM-6.5.0 FortiSIEM-6.4.4 FortiSIEM-6.4.3 FortiSIEM-6.4.2 FortiSIEM-6.4.1 FortiSIEM-6.4.0 FortiSIEM-6.3.3 FortiSIEM-6.3.2 FortiSIEM-6.3.1 FortiSIEM-6.3.0 FortiSIEM-6.2.1 FortiSIEM-6.2.0 FortiSIEM-6.1.2 FortiSIEM-6.1.1 FortiSIEM-6.1.0 FortiSIEM-5.4.0 FortiSIEM-5.3.3 FortiSIEM-5.3.2 FortiSIEM-5.3.1 FortiSIEM-5.3.0 FortiSOAR on-premise-7.4.2 FortiSOAR on-premise-7.4.1 FortiSOAR on-premise-7.4.0 FortiSOAR on-premise-7.3.3 FortiSOAR on-premise-7.3.2 FortiSOAR on-premise-7.3.1 FortiSOAR on-premise-7.3.0 FortiSOAR on-premise-7.2.2 FortiSOAR on-premise-7.2.1 FortiSOAR on-premise-7.2.0 FortiSOAR on-premise-7.0.3 FortiSOAR on-premise-7.0.2 FortiSOAR on-premise-7.0.1 FortiSOAR on-premise-7.0.0 FortiSOAR on-premise-6.4.4 FortiSOAR on-premise-6.4.3 FortiSOAR on-premise-6.4.1 FortiSOAR on-premise-6.4.0 FortiVoice-7.0.1 FortiVoice-7.0.0 FortiVoice-6.4.8 FortiVoice-6.4.7 FortiVoice-6.4.6 FortiVoice-6.4.5 FortiVoice-6.4.4 FortiVoice-6.4.3 FortiVoice-6.4.2 FortiVoice-6.4.1 FortiVoice-6.4.0 FortiVoice-6.0.12 FortiVoice-6.0.11 FortiVoice-6.0.10 FortiVoice-6.0.9 FortiVoice-6.0.8 FortiVoice-6.0.7 FortiVoice-6.0.6 FortiVoice-6.0.5 FortiVoice-6.0.4 FortiVoice-6.0.3 FortiVoice-6.0.2 FortiVoice-6.0.1 FortiVoice-6.0.0 FortiWeb-7.4.2 FortiWeb-7.4.1 FortiWeb-7.4.0 FortiWeb-7.2.7 FortiWeb-7.2.6 FortiWeb-7.2.5 FortiWeb-7.2.4 FortiWeb-7.2.3 FortiWeb-7.2.2 FortiWeb-7.2.1 FortiWeb-7.2.0 FortiWeb-7.0.10 FortiWeb-7.0.9 FortiWeb-7.0.8 FortiWeb-7.0.7 FortiWeb-7.0.6 FortiWeb-7.0.5 FortiWeb-7.0.4 FortiWeb-7.0.3 FortiWeb-7.0.2 FortiWeb-7.0.1 FortiWeb-7.0.0 FortiWeb-6.4.3 FortiWeb-6.4.2 FortiWeb-6.4.1 FortiWeb-6.4.0 FortiWeb-6.3.23 FortiWeb-6.3.22 FortiWeb-6.3.21 FortiWeb-6.3.20 FortiWeb-6.3.19 FortiWeb-6.3.18 FortiWeb-6.3.17 FortiWeb-6.3.16 FortiWeb-6.3.15 FortiWeb-6.3.14 FortiWeb-6.3.13 FortiWeb-6.3.12 FortiWeb-6.3.11 FortiWeb-6.3.10 FortiWeb-6.3.9 FortiWeb-6.3.8 FortiWeb-6.3.7 FortiWeb-6.3.6 FortiWeb-6.3.5 FortiWeb-6.3.4 FortiWeb-6.3.3 FortiWeb-6.3.2 FortiWeb-6.3.1 FortiWeb-6.3.0 FortiWeb-6.2.8 FortiWeb-6.2.7 FortiWeb-6.2.6 FortiWeb-6.2.5 FortiWeb-6.2.4 FortiWeb-6.2.3 FortiWeb-6.2.2 FortiWeb-6.2.1 FortiWeb-6.2.0 5.3 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N/E:P/RL:O/RC:C https://fortiguard.fortinet.com/psirt/FG-IR-23-490 OpenSSH Terrapin attack (CVE-2023-48795) Reference>