CVE-2025-32105
📋 TL;DR
A buffer overflow vulnerability in Sangoma IMG2020 HTTP server allows unauthenticated attackers to execute arbitrary code remotely. This affects all systems running vulnerable versions of the software, potentially giving attackers full control over affected devices.
💻 Affected Systems
- Sangoma IMG2020 HTTP server
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with attacker gaining root/admin privileges, installing persistent backdoors, pivoting to internal networks, and exfiltrating sensitive data.
Likely Case
Remote code execution leading to system takeover, data theft, and use as a foothold for further attacks within the network.
If Mitigated
Limited impact if proper network segmentation and access controls prevent exploitation attempts from reaching vulnerable systems.
🎯 Exploit Status
Technical details and proof-of-concept available in referenced GitHub papers, making exploitation straightforward for attackers.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified in provided references
Vendor Advisory: Not provided in references
Restart Required: No
Instructions:
1. Check Sangoma official website for security advisories
2. Apply any available patches immediately
3. Monitor vendor communications for updates
🔧 Temporary Workarounds
Network Access Restriction
linuxRestrict network access to Sangoma IMG2020 HTTP server to only trusted IP addresses
iptables -A INPUT -p tcp --dport 80 -s trusted_ip -j ACCEPT
iptables -A INPUT -p tcp --dport 80 -j DROP
Disable HTTP Server
linuxTemporarily disable the vulnerable HTTP server if not required for operations
systemctl stop img2020-http
systemctl disable img2020-http
🧯 If You Can't Patch
- Isolate affected systems in separate network segments with strict firewall rules
- Implement network-based intrusion prevention systems to detect and block exploitation attempts
🔍 How to Verify
Check if Vulnerable:
Check installed version of Sangoma IMG2020 HTTP server against vulnerable version rangeCheck Version:
img2020-http --version or check package managerVerify Fix Applied:
Verify version is updated beyond 2.3.9.6 and test HTTP server functionality📡 Detection & Monitoring
Log Indicators:
- Unusual HTTP requests with long parameters
- Multiple failed exploitation attempts
- Unexpected process creation from HTTP server
Network Indicators:
- HTTP requests with abnormally long payloads to IMG2020 server
- Traffic patterns suggesting buffer overflow attempts
SIEM Query:
source="http_access" AND (uri_length>1000 OR parameter_length>500) AND dest_port=80