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veracodeVeracode Vulnerability DatabaseVERACODE:44747
HistoryDec 19, 2023 - 9:12 a.m.

Prefix Truncation Attack (Terrapin Attack)

2023-12-1909:12:16
Veracode Vulnerability Database
sca.analysiscenter.veracode.com
54
libssh
vulnerability
handshake phase
sequence numbers
ssh protocol
disabled security features

7.1 High

AI Score

Confidence

Low

0.962 High

EPSS

Percentile

99.5%

libssh is vulnerable to Terrapin attack. The vulnerability is due to mishandling of the handshake phase and sequence numbers in the SSH Binary Packet Protocol (BPP) with certain OpenSSH extensions. This allows an attacker to bypass integrity checks and omit packets during extension negotiation, and potentially leads to disabled security features in SSH connections.

References