CVE-2023-30621 – CVE-2023-30621 is a critical command injection ... (How to Fix)

Q: What is the severity of CVE-2023-30621?

CVE-2023-30621 has a CVSS score of 9.8 (CRITICAL). CVE-2023-30621 is a critical command injection vulnerability in the Gipsy Discord bot that allows unauthenticated users to execute arbitrary commands with root privileges. The vulnerability exists in the !ping command which doesn't properly validate user input before passing it to a system shell. All users running Gipsy versions prior to 1.3 are affected.

📋 TL;DR

CVE-2023-30621 is a critical command injection vulnerability in the Gipsy Discord bot that allows unauthenticated users to execute arbitrary commands with root privileges. The vulnerability exists in the !ping command which doesn't properly validate user input before passing it to a system shell. All users running Gipsy versions prior to 1.3 are affected.

💻 Affected Systems

Products:

Gipsy Discord Bot

Versions: All versions prior to 1.3

Operating Systems: Linux (any distribution where bot runs with sudo/root privileges)

Default Config Vulnerable: ⚠️ Yes

Notes: Vulnerability requires the bot to be running with sudo/root permissions, which is common for Discord bots needing network access.

📦 What is this software?

Gipsy by Gipsy Project

View all CVEs affecting Gipsy →

⚠️ Risk & Real-World Impact

🔴

Worst Case

Complete system compromise - attacker gains root shell access, can install malware, exfiltrate data, pivot to other systems, or destroy the host.

🟠

Likely Case

Remote code execution leading to bot compromise, data theft, and potential lateral movement within the network.

🟢

If Mitigated

Limited impact if bot runs with minimal privileges and network segmentation prevents lateral movement.

🌐 Internet-Facing: HIGH - Discord bots are typically internet-facing services accessible to any Discord user.

🏢 Internal Only: MEDIUM - Even internal-only bots could be exploited by compromised Discord accounts or insider threats.

🎯 Exploit Status

Public PoC: ⚠️ Yes

Weaponized: LIKELY

Unauthenticated Exploit: ⚠️ Yes

Complexity: LOW

Exploitation is trivial - any Discord user can send a malicious !ping command with command injection payloads like '127.0.0.1; rm -rf /'

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: 1.3

Vendor Advisory: https://github.com/Curiosity-org/Gipsy/security/advisories/GHSA-6cw6-r8pg-j7wh

Restart Required: Yes

Instructions:

1. Stop the Gipsy bot service. 2. Update to version 1.3 using git pull or download latest release. 3. Restart the bot service.

🔧 Temporary Workarounds

Disable !ping command

all

Remove or disable the vulnerable ping command module

Edit bot configuration to remove ping command module

Run bot without sudo

linux

Run Gipsy with non-privileged user account

sudo -u nonprivilegeduser node bot.js

🧯 If You Can't Patch

Immediately disable the Gipsy bot service until patching is possible
Implement network segmentation to isolate the bot server from critical systems

🔍 How to Verify

Check if Vulnerable:

Check Gipsy version - if below 1.3, you are vulnerable. Also check if bot runs with sudo/root privileges.

Check Version:

Check package.json or bot startup logs for version number

Verify Fix Applied:

Verify version is 1.3 or higher and test !ping command with safe input only.

📡 Detection & Monitoring

Log Indicators:

Unusual ping commands with special characters
Multiple failed ping attempts
System commands appearing in bot logs

Network Indicators:

Unexpected outbound connections from bot server
Unusual process spawning patterns

SIEM Query:

source="gipsy.log" AND command="!ping" AND (payload CONTAINS ";" OR payload CONTAINS "|" OR payload CONTAINS "`")

📊 Metadata

CVE ID: CVE-2023-30621

CVSS v3 Score: 9.8 (CRITICAL)

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CWE: CWE-78

Published: April 21, 2023

Last Updated: November 21, 2024

🔗 References

https://github.com/Curiosity-org/Gipsy/security/advisories/GHSA-6cw6-r8pg-j7wh Patch,Third Party Advisory
https://github.com/Gunivers/Gipsy/pull/24 Patch
https://github.com/Gunivers/Gipsy/pull/24/commits/716818e967069f144aae66d51464b237c22b6cdf Patch
https://github.com/Curiosity-org/Gipsy/security/advisories/GHSA-6cw6-r8pg-j7wh Patch,Third Party Advisory
https://github.com/Gunivers/Gipsy/pull/24 Patch
https://github.com/Gunivers/Gipsy/pull/24/commits/716818e967069f144aae66d51464b237c22b6cdf Patch

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🔗 Related Vulnerabilities

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