| Description: | 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 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. This also affects Maverick
Synergy Java SSH API before 3.1.0-SNAPSHOT, Dropbear through 2022.83,
Ssh before 5.1.1 in Erlang/OTP, PuTTY before 0.80, AsyncSSH before
2.14.2, golang.org/x/crypto before 0.17.0, libssh before 0.10.6,
libssh2 through 1.11.0, Thorn Tech SFTP Gateway before 3.4.6, Tera
Term before 5.1, Paramiko before 3.4.0, jsch before 0.2.15, SFTPGo
before 2.5.6, Netgate pfSense Plus through 23.09.1, Netgate pfSense CE
through 2.7.2, HPN-SSH through 18.2.0, ProFTPD before 1.3.8b (and
before 1.3.9rc2), ORYX CycloneSSH before 2.3.4, NetSarang XShell 7
before Build 0144, CrushFTP before 10.6.0, ConnectBot SSH library
before 2.2.22, Apache MINA sshd through 2.11.0, sshj through 0.37.0,
TinySSH through 20230101, trilead-ssh2 6401, LANCOM LCOS and
LANconfig, FileZilla before 3.66.4, Nova before 11.8, PKIX-SSH before
14.4, SecureCRT before 9.4.3, Transmit5 before 5.10.4, Win32-OpenSSH
before 9.5.0.0p1-Beta, WinSCP before 6.2.2, Bitvise SSH Server before
9.32, Bitvise SSH Client before 9.33, KiTTY through 0.76.1.13, the
net-ssh gem 7.2.0 for Ruby, the mscdex ssh2 module before 1.15.0 for
Node.js, the thrussh library before 0.35.1 for Rust, and the Russh
crate before 0.40.2 for Rust.
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