CVE-2024-10442
📋 TL;DR
This critical vulnerability allows remote attackers to execute arbitrary code on affected Synology systems due to an off-by-one error in the transmission component. It affects Synology Replication Service and Unified Controller before specific versions. Successful exploitation could lead to complete system compromise.
💻 Affected Systems
- Synology Replication Service
- Synology Unified Controller (DSMUC)
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with remote code execution leading to data theft, ransomware deployment, or lateral movement across the network.
Likely Case
Remote code execution allowing attackers to gain initial foothold, install malware, or pivot to other systems.
If Mitigated
Limited impact if systems are isolated, patched, or have network controls preventing remote access.
🎯 Exploit Status
CVSS 10.0 indicates trivial exploitation with maximum impact; remote unauthenticated attack vectors exist.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Replication Service: 1.0.12-0066, 1.2.2-0353, 1.3.0-0423 or later; DSMUC: 3.1.4-23079 or later
Vendor Advisory: https://www.synology.com/en-global/security/advisory/Synology_SA_24_22
Restart Required: Yes
Instructions:
1. Log into DSM as administrator. 2. Open Package Center. 3. Check for updates for Replication Service or DSMUC. 4. Apply available updates. 5. Restart affected services or the entire system.
🔧 Temporary Workarounds
Network Segmentation
linuxRestrict network access to Synology services to trusted IPs only.
iptables -A INPUT -p tcp --dport [service_port] -s [trusted_ip] -j ACCEPT
iptables -A INPUT -p tcp --dport [service_port] -j DROP
🧯 If You Can't Patch
- Isolate affected systems from internet and untrusted networks
- Implement strict network access controls and monitor for exploitation attempts
🔍 How to Verify
Check if Vulnerable:
Check installed package versions via DSM Package Center or SSH: synopkg version ReplicationService or synopkg version DSMUCCheck Version:
synopkg version ReplicationService && synopkg version DSMUCVerify Fix Applied:
Verify version numbers match or exceed patched versions: Replication Service >= 1.0.12-0066, 1.2.2-0353, 1.3.0-0423; DSMUC >= 3.1.4-23079📡 Detection & Monitoring
Log Indicators:
- Unusual process execution from Replication Service or DSMUC
- Network connections to suspicious external IPs from service ports
Network Indicators:
- Unexpected outbound connections from Synology services
- Exploit attempts targeting service ports
SIEM Query:
source="synology" AND (process="ReplicationService" OR process="DSMUC") AND event="execve"