What’s Vulnerable › Vulnerabilities

CVE-2018-7749

• Severity: critical (CVSS 9.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2018-03-12 · updated 2026-06-17
• Weakness: CWE-287

Description

The SSH server implementation of AsyncSSH before 1.12.1 does not properly check whether authentication is completed before processing other requests. A customized SSH client can simply skip the authentication step.

Affected products

• ronf asyncssh: before 1.12.1 — fixed in 1.12.1

How to fix

Upgrade to a fixed version: ronf asyncssh 1.12.1. Check the vendor advisory for mitigations.

References

• https://github.com/ronf/asyncssh/commit/c161e26cdc0d41b745b63d9f17b437f073bf7ba4
• https://groups.google.com/forum/#%21msg/asyncssh-announce/57_5O7kiHSA/8BXZ_hxHAQAJ
• https://github.com/ronf/asyncssh/commit/c161e26cdc0d41b745b63d9f17b437f073bf7ba4
• https://groups.google.com/forum/#%21msg/asyncssh-announce/57_5O7kiHSA/8BXZ_hxHAQAJ

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