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CVE-2023-48795 Detail

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.


Metrics

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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CVE, MITRE Mailing List  Third Party Advisory 
CVE, MITRE Mailing List  Third Party Advisory 
CVE, MITRE Mailing List  Third Party Advisory 
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CVE, MITRE Mailing List  Third Party Advisory 
CVE, MITRE Mailing List  Third Party Advisory 
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CVE, MITRE Mailing List  Third Party Advisory 
CVE, MITRE Mailing List  Third Party Advisory 
CVE, MITRE Mailing List  Third Party Advisory 
CVE, MITRE Mailing List  Third Party Advisory 
CVE, MITRE Mailing List  Third Party Advisory 
CVE, MITRE Mailing List  Third Party Advisory 
CVE, MITRE Mailing List  Third Party Advisory 
CVE, MITRE Mailing List  Third Party Advisory 
CVE, MITRE Mailing List  Third Party Advisory 
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CVE, MITRE Release Notes 
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CVE, MITRE Third Party Advisory 
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CVE, MITRE Release Notes 
CVE, MITRE Release Notes 
CVE, MITRE Release Notes 
CVE, MITRE Release Notes 
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CVE, MITRE Issue Tracking 
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CVE Exploit  Third Party Advisory 
CVE Exploit  Third Party Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-354 Improper Validation of Integrity Check Value cwe source acceptance level NIST   CISA-ADP  

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Change History

55 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2023-48795
NVD Published Date:
12/18/2023
NVD Last Modified:
05/12/2026
Source:
MITRE