Goshs, a simple web server, fails to validate user input in the `dispatchReadPump` function, allowing unauthenticated attackers to execute arbitrary commands via websockets. The vulnerability stems from missing checks for the `cli-c` option, enabling malicious websocket requests to trigger system commands. Attackers can exploit this by sending crafted websocket messages, leading to remote code execution (RCE) on the server.
Proof of Concept (PoC):
Using websocat, an attacker can establish a websocket connection and send a malicious payload containing OS commands. The server processes this input without sanitization, executing the commands with the same privileges as the Goshs process.
DailyCVE Form:
Platform: Goshs
Version: 0.3.4 – 1.0.4
Vulnerability: Command Execution
Severity: Critical
Date: May 6, 2025
What Undercode Say:
Exploitation:
1. Establish Websocket Connection:
websocat ws://target:port
2. Send Malicious Payload:
{"cli-c":"malicious_command"}
Mitigation:
1. Update to Patched Version (1.0.5+):
npm update goshs
2. Input Sanitization:
if (msg.cli-c) { sanitize(msg.cli-c); }
3. Network Restrictions:
iptables -A INPUT -p tcp --dport PORT -j DROP
Detection:
1. Log Analysis:
grep "websocket" /var/log/goshs.log
2. Process Monitoring:
ps aux | grep goshs
References:
- GitHub Advisory: GHSA-xxxx-xxxx-xxxx
- CVE Details: CVE-2025-XXXX
Sources:
Reported By: github.com
Extra Source Hub:
Undercode
