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Missing key verification in gost

Critical severity GitHub Reviewed Published Jul 3, 2024 to the GitHub Advisory Database • Updated Oct 25, 2024

Package

gomod github.com/ginuerzh/gost (Go)

Affected versions

<= 2.11.5

Patched versions

None

Description

An authentication bypass in the SSH service of gost v2.11.5 allows attackers to intercept communications via setting the HostKeyCallback function to ssh.InsecureIgnoreHostKey

References

Published by the National Vulnerability Database Jul 3, 2024
Published to the GitHub Advisory Database Jul 3, 2024
Reviewed Oct 25, 2024
Last updated Oct 25, 2024

Severity

Critical

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS score

0.045%
(17th percentile)

Weaknesses

CVE ID

CVE-2024-39223

GHSA ID

GHSA-8wxx-35qc-vp6r

Source code

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