CVE-2018-10933

critical

Description

A vulnerability was found in libssh's server-side state machine before versions 0.7.6 and 0.8.4. A malicious client could create channels without first performing authentication, resulting in unauthorized access.

From the Tenable Blog

libssh Vulnerable to Authentication Bypass (CVE-2018-10933)
libssh Vulnerable to Authentication Bypass (CVE-2018-10933)

Published: 2018-10-17

A newly announced vulnerability in libssh, a multiplatform library that supports the Secure Shell (SSH) protocol, allows attackers to bypass authentication and gain full control over vulnerable servers.

References

Details

Source: Mitre, NVD

Published: 2018-10-17

Updated: 2026-06-17

Risk Information

CVSS v2

Base Score: 6.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:N

Severity: Medium

CVSS v3

Base Score: 9.1

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Severity: Critical

EPSS

EPSS: 0.91789