CVE-2023-48795Medium· 5.9▾ TwilightPoC availableThe 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), a…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 32.5 · likelihood 18.7 · exploitation 12
A public proof-of-concept already exists for this vulnerability — see Exploit availability below.
Public exploit / PoC code seen in 2 sources. Availability, not in-the-wild use.
Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Aug 4.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
93%
5 GitHub repos · Nuclei ×1
93% → 94%
Last analysed / modified upstream
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.
openssh < 9.6putty < 0.80filezilla_client < 3.66.4transmit_5 < 5.10.4nova < 11.8pkixssh < 14.4winscp < 6.2.2ssh_client < 9.33ssh_server < 9.32lcos <= 3.66.4lcos_fxlcos_lxlcos_sx = 4.20lcos_sx = 5.20lanconfigsecurecrt < 9.4.3libssh < 0.10.6net-ssh = 7.2.0ssh2 <= 1.11.0proftpd <= 1.3.8bfreebsd <= 12.4thrussh < 0.35.1tera_term <= 5.1cyclone_ssh < 2.3.4crushftp <= 10.6.0xshell_7 < build__0144paramiko < 3.4.0openshift_container_platform = 4.0openstack_platform = 16.1openstack_platform = 16.2openstack_platform = 17.1ceph_storage = 6.0enterprise_linux = 8.0enterprise_linux = 9.0openshift_serverlessopenshift_gitopsopenshift_pipelinesopenshift_developer_tools_and_servicesopenshift_data_foundation = 4.0openshift_api_for_data_protectionopenshift_virtualization = 4storage = 3.0discoveryopenshift_dev_spacescert-manager_operator_for_red_hat_openshiftkeycloakjboss_enterprise_application_platform = 7.0single_sign-on = 7.0advanced_cluster_security = 3.0advanced_cluster_security = 4.0crypto < 0.17.0russh < 0.40.2sftpgo < 2.5.6erlang/otp < 22.3.4.27erlang/otp >= 23.0, < 23.3.4.20erlang/otp >= 24.0, < 24.3.4.15erlang/otp >= 25.0, < 25.3.2.8erlang/otp >= 26.0, < 26.2.1jsch < 0.2.15libssh2 < 1.11.1asyncssh < 2.14.2dropbear_ssh < 2022.83maverick_synergy_java_ssh_api < 3.1.0-snapshotssh < 4.9.1.5ssh >= 4.10, < 4.11.1.7ssh >= 4.12, < 4.13.2.4ssh >= 4.14, < 4.15.3.1ssh >= 5.0, < 5.1.1sftp_gateway_firmware < 3.4.6pfsense_plus <= 23.09.1pfsense_ce <= 2.7.2crushftp < 10.6.0sshlib < 2.2.22sshd <= 2.11.0sshj <= 0.37.0tinyssh <= 20230101ssh2 = 6401kitty <= 0.76.1.13securityfedora = 38fedora = 39debian_linux = 10.0macos >= 14.0, < 14.4Upgrade past the affected range:
openssh 9.6putty 0.80filezilla_client 3.66.4transmit_5 5.10.4nova 11.8pkixssh 14.4winscp 6.2.2ssh_client 9.33ssh_server 9.32securecrt 9.4.3libssh 0.10.6thrussh 0.35.1cyclone_ssh 2.3.4xshell_7 build__0144paramiko 3.4.0crypto 0.17.0russh 0.40.2sftpgo 2.5.6erlang/otp 26.2.1jsch 0.2.15libssh2 1.11.1asyncssh 2.14.2dropbear_ssh 2022.83maverick_synergy_java_ssh_api 3.1.0-snapshotssh 5.1.1sftp_gateway_firmware 3.4.6crushftp 10.6.0sshlib 2.2.22macos 14.4Affected packages:
russh < 0.40.2golang.org/x/crypto >= 0.1.0, < 0.17.0paramiko >= 2.5.0, < 3.4.0golang.org/x/crypto < 0.0.0-20231218163308-9d2ee975ef9fPatched in:
russh 0.40.2golang.org/x/crypto 0.17.0paramiko 3.4.0golang.org/x/crypto 0.0.0-20231218163308-9d2ee975ef9fField changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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