CVE-2020-11698
📋 TL;DR
CVE-2020-11698 is a critical command injection vulnerability in SpamTitan's SNMP configuration page that allows remote attackers to execute arbitrary commands on the server. This affects SpamTitan 7.07 installations with the vulnerable snmp-x.php endpoint accessible. Attackers can gain complete control of affected systems.
💻 Affected Systems
- SpamTitan
📦 What is this software?
Spamtitan by Titanhq
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with attacker gaining root/administrator privileges, installing persistent backdoors, exfiltrating sensitive data, and pivoting to internal networks.
Likely Case
Remote code execution leading to malware deployment, credential theft, and use as a foothold for further attacks.
If Mitigated
Limited impact if proper network segmentation, web application firewalls, and input validation are implemented.
🎯 Exploit Status
Multiple public exploit scripts available. Attack requires sending crafted HTTP requests to the vulnerable endpoint.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 7.08 or later
Vendor Advisory: https://www.titanhq.com/support/security-advisory/
Restart Required: Yes
Instructions:
1. Backup current configuration. 2. Download latest SpamTitan update from vendor portal. 3. Apply update via web interface or CLI. 4. Restart services as prompted. 5. Verify update completed successfully.
🔧 Temporary Workarounds
Block SNMP Configuration Access
linuxRestrict access to the vulnerable snmp-x.php endpoint using firewall rules or web server configuration.
iptables -A INPUT -p tcp --dport 80 -m string --string "snmp-x.php" --algo bm -j DROP
iptables -A INPUT -p tcp --dport 443 -m string --string "snmp-x.php" --algo bm -j DROP
Disable SNMP Service
linuxTemporarily disable SNMP service if not required for operations.
systemctl stop snmpd
systemctl disable snmpd
🧯 If You Can't Patch
- Implement strict network segmentation to isolate SpamTitan appliance from critical systems
- Deploy web application firewall (WAF) with command injection rules in front of SpamTitan interface
🔍 How to Verify
Check if Vulnerable:
Check if SpamTitan version is 7.07 via web interface or SSH: cat /etc/version. Test if snmp-x.php endpoint responds to requests.Check Version:
cat /etc/version || grep 'Version' /usr/local/spamtitan/version.txtVerify Fix Applied:
Verify version is 7.08 or higher. Test that snmp-x.php endpoint properly sanitizes input or returns error for malicious payloads.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to snmp-x.php with shell metacharacters
- Unexpected process execution from web user context
- SNMP configuration file modifications
Network Indicators:
- HTTP requests containing command injection patterns to SpamTitan web interface
- Outbound connections from SpamTitan to unexpected destinations
SIEM Query:
source="spamtitan_access.log" AND uri="*snmp-x.php*" AND (request="*;*" OR request="*|*" OR request="*`*" OR request="*$(*")🔗 References
- http://packetstormsecurity.com/files/159470/SpamTitan-7.07-Remote-Code-Execution.html
- http://packetstormsecurity.com/files/160809/SpamTitan-7.07-Command-Injection.html
- https://github.com/felmoltor
- https://sensepost.com/blog/2020/clash-of-the-spamtitan/
- https://twitter.com/felmoltor
- https://www.spamtitan.com/
- http://packetstormsecurity.com/files/159470/SpamTitan-7.07-Remote-Code-Execution.html
- http://packetstormsecurity.com/files/160809/SpamTitan-7.07-Command-Injection.html
- https://github.com/felmoltor
- https://sensepost.com/blog/2020/clash-of-the-spamtitan/
- https://twitter.com/felmoltor
- https://www.spamtitan.com/
