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Route not protected allows command execution

Critical
patrickhener published GHSA-rwj2-w85g-5cmm May 6, 2025

Package

No package listed

Affected versions

v0.3.4 - 1.0.4

Patched versions

1.0.5

Description

Summary

Short summary of the problem. Make the impact and severity as clear as possible. For example: An unsafe deserialization vulnerability allows any unauthenticated user to execute arbitrary code on the server.
It seems that when running goshs without arguments it is possible for anyone to execute commands on the server. I tested this vulnerability only on version 1.0.4 of goshs. I saw that the command function appeared on version 0.3.4.

Details

Give all details on the vulnerability. Pointing to the incriminated source code is very helpful for the maintainer.
It seems that the function dispatchReadPump does not checks the option cli -c, thus allowing anyone to execute arbitrary command through the use of websockets.

PoC

Complete instructions, including specific configuration details, to reproduce the vulnerability.
I used websocat for the POC:

echo -e '{"type": "command", "content": "id"}' |./websocat 'ws://192.168.1.11:8000/?ws' -t

Impact

What kind of vulnerability is it? Who is impacted?
The vulnerability will only impacts goshs server on vulnerable versions.

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
Low

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

CVE ID

CVE-2025-46816

Weaknesses

Credits