CVE-2023-48795Published

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 …

Exact source revision recorded 24 Oct 2026 22:17:33 UTC. It does not establish the source's current position. Latest evidence.

Recorded JSON

nvd · CVE-2023-48795

Published

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.

NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON.

Source analysis status: Modified

Weakness classifications: CWE-354

Original publisher date fields

published: 2023-12-18T16:15:10.897

lastModified: 2026-10-15T01:17:10.937

76 source CPE criteria · context only

cpe:2.3:a:openbsd:openssh:*:*:*:*:*:*:*:*
cpe:2.3:a:putty:putty:*:*:*:*:*:*:*:*
cpe:2.3:a:filezilla-project:filezilla_client:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*
cpe:2.3:a:panic:transmit_5:*:*:*:*:*:*:*:*
cpe:2.3:a:panic:nova:*:*:*:*:*:*:*:*
cpe:2.3:a:roumenpetrov:pkixssh:*:*:*:*:*:*:*:*
cpe:2.3:a:winscp:winscp:*:*:*:*:*:*:*:*
cpe:2.3:a:bitvise:ssh_client:*:*:*:*:*:*:*:*
cpe:2.3:a:bitvise:ssh_server:*:*:*:*:*:*:*:*
cpe:2.3:o:lancom-systems:lcos:*:*:*:*:*:*:*:*
cpe:2.3:o:lancom-systems:lcos_fx:-:*:*:*:*:*:*:*
cpe:2.3:o:lancom-systems:lcos_lx:-:*:*:*:*:*:*:*
cpe:2.3:o:lancom-systems:lcos_sx:4.20:*:*:*:*:*:*:*
cpe:2.3:o:lancom-systems:lcos_sx:5.20:*:*:*:*:*:*:*
cpe:2.3:o:lancom-systems:lanconfig:-:*:*:*:*:*:*:*
cpe:2.3:a:vandyke:securecrt:*:*:*:*:*:*:*:*
cpe:2.3:a:libssh:libssh:*:*:*:*:*:*:*:*
cpe:2.3:a:net-ssh:net-ssh:7.2.0:*:*:*:*:ruby:*:*
cpe:2.3:a:ssh2_project:ssh2:*:*:*:*:*:node.js:*:*
cpe:2.3:a:proftpd:proftpd:*:*:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:*
cpe:2.3:a:crates:thrussh:*:*:*:*:*:*:*:*
cpe:2.3:a:tera_term_project:tera_term:*:*:*:*:*:*:*:*
cpe:2.3:a:oryx-embedded:cyclone_ssh:*:*:*:*:*:*:*:*
cpe:2.3:a:crushftp:crushftp:*:*:*:*:*:*:*:*
cpe:2.3:a:netsarang:xshell_7:*:*:*:*:*:*:*:*
cpe:2.3:a:paramiko:paramiko:*:*:*:*:*:*:*:*
cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:*
cpe:2.3:a:redhat:openstack_platform:16.1:*:*:*:*:*:*:*
cpe:2.3:a:redhat:openstack_platform:16.2:*:*:*:*:*:*:*
cpe:2.3:a:redhat:openstack_platform:17.1:*:*:*:*:*:*:*
cpe:2.3:a:redhat:ceph_storage:6.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
cpe:2.3:a:redhat:openshift_serverless:-:*:*:*:*:*:*:*
cpe:2.3:a:redhat:openshift_gitops:-:*:*:*:*:*:*:*
cpe:2.3:a:redhat:openshift_pipelines:-:*:*:*:*:*:*:*
cpe:2.3:a:redhat:openshift_developer_tools_and_services:-:*:*:*:*:*:*:*
cpe:2.3:a:redhat:openshift_data_foundation:4.0:*:*:*:*:*:*:*
cpe:2.3:a:redhat:openshift_api_for_data_protection:-:*:*:*:*:*:*:*
cpe:2.3:a:redhat:openshift_virtualization:4:*:*:*:*:*:*:*
cpe:2.3:a:redhat:storage:3.0:*:*:*:*:*:*:*
cpe:2.3:a:redhat:discovery:-:*:*:*:*:*:*:*
cpe:2.3:a:redhat:openshift_dev_spaces:-:*:*:*:*:*:*:*
cpe:2.3:a:redhat:cert-manager_operator_for_red_hat_openshift:-:*:*:*:*:*:*:*
cpe:2.3:a:redhat:keycloak:-:*:*:*:*:*:*:*
cpe:2.3:a:redhat:jboss_enterprise_application_platform:7.0:*:*:*:*:*:*:*
cpe:2.3:a:redhat:single_sign-on:7.0:*:*:*:*:*:*:*
cpe:2.3:a:redhat:advanced_cluster_security:3.0:*:*:*:*:*:*:*
cpe:2.3:a:redhat:advanced_cluster_security:4.0:*:*:*:*:*:*:*
cpe:2.3:a:golang:crypto:*:*:*:*:*:*:*:*
cpe:2.3:a:russh_project:russh:*:*:*:*:*:rust:*:*
cpe:2.3:a:sftpgo_project:sftpgo:*:*:*:*:*:*:*:*
cpe:2.3:a:erlang:erlang\/otp:*:*:*:*:*:*:*:*
cpe:2.3:a:matez:jsch:*:*:*:*:*:*:*:*
cpe:2.3:a:libssh2:libssh2:*:*:*:*:*:*:*:*
cpe:2.3:a:asyncssh_project:asyncssh:*:*:*:*:*:*:*:*
cpe:2.3:a:dropbear_ssh_project:dropbear_ssh:*:*:*:*:*:*:*:*
cpe:2.3:a:jadaptive:maverick_synergy_java_ssh_api:*:*:*:*:*:*:*:*
cpe:2.3:a:ssh:ssh:*:*:*:*:*:*:*:*
cpe:2.3:o:thorntech:sftp_gateway_firmware:*:*:*:*:*:*:*:*
cpe:2.3:a:netgate:pfsense_plus:*:*:*:*:*:*:*:*
cpe:2.3:a:netgate:pfsense_ce:*:*:*:*:*:*:*:*
cpe:2.3:a:connectbot:sshlib:*:*:*:*:*:*:*:*
cpe:2.3:a:apache:sshd:*:*:*:*:*:*:*:*
cpe:2.3:a:apache:sshj:*:*:*:*:*:*:*:*
cpe:2.3:a:tinyssh:tinyssh:*:*:*:*:*:*:*:*
cpe:2.3:a:trilead:ssh2:6401:*:*:*:*:*:*:*
cpe:2.3:a:9bis:kitty:*:*:*:*:*:*:*:*
cpe:2.3:a:gentoo:security:-:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:-:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:39:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*

The original JSON retains the logical configuration operators, exclusions and version bounds.

Source published: 18 Dec 2023 16:15:10 UTC
Source modified: 15 Oct 2026 01:17:10 UTC
Observed here: 24 Oct 2026 22:17:33 UTC
Source terms: NIST NVD usage terms; underlying source attribution retained

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: nvd · NIST NVD usage terms; underlying source attribution retained. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS 3.1 · [email protected] · Primary · 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

CVSS 3.1 · 134c704f-9b21-4f2e-91b3-4a467353bcc0 · Secondary · 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N