CVE-2018-19290
📋 TL;DR
CVE-2018-19290 is a command injection vulnerability in Budabot's HELPBOOT_MODULE that allows remote attackers to execute arbitrary commands on the PHP daemon. This affects Budabot versions 0.6 through 4.0 and can lead to denial of service or potentially full system compromise. Attackers can exploit this via crafted commands like '!calc 5 x 5' to inject malicious payloads.
💻 Affected Systems
- Budabot
📦 What is this software?
Budabot by Budabot
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with remote code execution, allowing attackers to execute arbitrary commands, install malware, or pivot to other systems.
Likely Case
Denial of service through command injection that crashes the PHP daemon or consumes system resources.
If Mitigated
Limited impact if proper input validation and command sanitization are implemented.
🎯 Exploit Status
Exploit is publicly available and requires minimal technical skill to execute via crafted commands.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Versions after 4.0 (check for updates)
Vendor Advisory: Not available - Budabot appears to be community-maintained
Restart Required: Yes
Instructions:
1. Update to the latest Budabot version. 2. Replace vulnerable files with patched versions. 3. Restart the PHP daemon. 4. Verify the fix by testing command injection attempts.
🔧 Temporary Workarounds
Disable HELPBOOT_MODULE
allRemove or disable the vulnerable module to prevent exploitation
mv modules/HELPBOT_MODULE modules/HELPBOT_MODULE.disabled
Restart PHP daemon
Implement input validation
allAdd strict input validation to sanitize user commands before processing
Edit vulnerable PHP files to add input sanitization functions like escapeshellarg()
🧯 If You Can't Patch
- Network segmentation: Isolate Budabot instances from critical systems
- Implement strict firewall rules to limit access to Budabot services
🔍 How to Verify
Check if Vulnerable:
Test with command injection payloads like '!calc 5; id' to see if system commands executeCheck Version:
Check Budabot version in configuration files or via bot commandsVerify Fix Applied:
Attempt the same command injection payloads and verify they are rejected or sanitized📡 Detection & Monitoring
Log Indicators:
- Unusual command patterns in PHP logs
- System command execution from Budabot process
- Multiple failed command attempts
Network Indicators:
- Unusual outbound connections from Budabot server
- Command and control traffic patterns
SIEM Query:
source="budabot.log" AND (command="!calc*" OR command="!helpbot*") AND (payload="*;*" OR payload="*|*" OR payload="*`*")