CVE-2020-5341
📋 TL;DR
This vulnerability allows remote unauthenticated attackers to execute arbitrary code on Dell EMC Avamar Server and Integrated Data Protection Appliance systems by sending malicious serialized data. Affected systems include specific versions of these backup and recovery products, potentially compromising the entire system.
💻 Affected Systems
- Dell EMC Avamar Server
- Dell EMC Integrated Data Protection Appliance
📦 What is this software?
Emc Integrated Data Protection Appliance Firmware by Dell
View all CVEs affecting Emc Integrated Data Protection Appliance Firmware →
Emc Integrated Data Protection Appliance Firmware by Dell
View all CVEs affecting Emc Integrated Data Protection Appliance Firmware →
Emc Integrated Data Protection Appliance Firmware by Dell
View all CVEs affecting Emc Integrated Data Protection Appliance Firmware →
Emc Integrated Data Protection Appliance Firmware by Dell
View all CVEs affecting Emc Integrated Data Protection Appliance Firmware →
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with remote code execution, allowing attackers to install malware, exfiltrate data, or pivot to other systems.
Likely Case
Remote code execution leading to data theft, ransomware deployment, or system disruption affecting backup operations.
If Mitigated
Limited impact if systems are isolated, patched, or have network controls preventing external access.
🎯 Exploit Status
Remote unauthenticated exploitation with CVSS 9.8 suggests relatively straightforward exploitation once payload is developed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Dell advisory for specific patched versions
Vendor Advisory: https://www.dell.com/support/security/en-us/details/541677/DSA-2020-057-Dell-EMC-Avamar-Server-Deserialization-of-Untrusted-Data-Vulnerability
Restart Required: Yes
Instructions:
1. Review Dell advisory DSA-2020-057. 2. Download appropriate patches from Dell support portal. 3. Apply patches following Dell's documented procedures. 4. Restart affected services/systems as required.
🔧 Temporary Workarounds
Network Segmentation
allRestrict network access to Avamar/IDPA systems to only trusted management networks
Firewall Rules
allImplement strict firewall rules to limit inbound connections to necessary ports only
🧯 If You Can't Patch
- Isolate affected systems from internet and untrusted networks
- Implement strict network access controls and monitor for suspicious activity
🔍 How to Verify
Check if Vulnerable:
Check system version against affected versions list. Review Dell advisory for specific detection methods.Check Version:
Check Avamar/IDPA management interface or use vendor-specific CLI commands for version informationVerify Fix Applied:
Verify patch installation through system version check and confirm with Dell's verification procedures.📡 Detection & Monitoring
Log Indicators:
- Unusual serialization/deserialization activity
- Unexpected process execution
- Network connections from unusual sources
Network Indicators:
- Malformed serialized data packets to Avamar/IDPA ports
- Unexpected outbound connections from backup systems
SIEM Query:
Search for: (source_ip external AND dest_ip backup_system AND protocol tcp AND port avamar_ports) OR (process_execution unusual FROM backup_host)