Exploitation Summary
CVE-2023-48795 has been observed exploited in the wild (reported by VulnCheck KEV). EIP tracks 5 public exploits from researchers including TrixSec, Mr-Whiskerss, oseasfr. A Nuclei detection template is also available.
AI-analyzed exploit summary This repository contains a Python-based scanner that checks for OpenSSH versions vulnerable to CVE-2023-48795 by querying remote SSH servers. It does not exploit the vulnerability but detects vulnerable versions (pre-9.6).
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 [email protected] and (if CBC is used) the [email protected] 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.
Exploits (5)
This repository contains a Python-based scanner that checks for OpenSSH versions vulnerable to CVE-2023-48795 by querying remote SSH servers. It does not exploit the vulnerability but detects vulnerable versions (pre-9.6).
This repository contains a Python-based scanner for CVE-2023-48795, which checks SSH servers for vulnerability to the Terrapin attack by analyzing KEXINIT packets for vulnerable cipher/MAC combinations and strict-KEX support. It does not exploit the vulnerability but passively detects it.
This repository contains a Python-based scanner that identifies OpenSSH servers potentially vulnerable to CVE-2023-48795 (Terrapin) and CVE-2024-6387 (regreSSHion) by reading SSH banners and comparing versions. It does not exploit the vulnerabilities but scans for them.
This repository contains a Python-based scanner for detecting SSH servers vulnerable to the Terrapin attack (CVE-2023-48795). It checks for the presence of vulnerable ciphers and strict key exchange support.
This repository contains a Python-based scanner that checks for OpenSSH versions vulnerable to CVE-2023-48795 (Terrapin attack) by extracting SSH banners via netcat. It does not exploit the vulnerability but identifies potentially vulnerable targets.
Nuclei Templates (1)
product:"OpenSSH" || product:"openssh" || cpe:"cpe:2.3:a:openbsd:openssh"
References (139)
Scores
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N