CVE-2020-7136
📋 TL;DR
CVE-2020-7136 is a critical vulnerability in HPE Smart Update Manager (SUM) that allows remote attackers to gain unauthorized access to affected systems. This affects all HPE SUM installations prior to version 8.5.6. Organizations using HPE servers with Smart Update Manager are at risk.
💻 Affected Systems
- HPE Smart Update Manager (SUM)
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing attackers to execute arbitrary code, steal sensitive data, and pivot to other network resources.
Likely Case
Unauthorized access leading to data exfiltration, system manipulation, and potential ransomware deployment.
If Mitigated
Limited impact if proper network segmentation and access controls prevent exploitation attempts.
🎯 Exploit Status
The vulnerability allows remote unauthorized access, suggesting relatively straightforward exploitation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 8.5.6 or later
Vendor Advisory: https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbmu03997en_us
Restart Required: Yes
Instructions:
1. Download HPE Smart Update Manager version 8.5.6 or later from HPE Support Center. 2. Stop all SUM services. 3. Install the update following HPE documentation. 4. Restart the system. 5. Verify successful installation.
🔧 Temporary Workarounds
Network Isolation
allRestrict network access to SUM management interfaces
Use firewall rules to block external access to SUM ports (typically 280, 443, 8080)
Service Disablement
allTemporarily disable SUM services if not actively needed
Windows: sc stop "HPE Smart Update Manager"
Linux: systemctl stop hpe-sum
🧯 If You Can't Patch
- Implement strict network segmentation to isolate SUM systems from untrusted networks
- Deploy intrusion detection systems to monitor for exploitation attempts
🔍 How to Verify
Check if Vulnerable:
Check SUM version via GUI or command line: sum --version or check installed version in Windows ProgramsCheck Version:
sum --versionVerify Fix Applied:
Confirm SUM version is 8.5.6 or higher and test functionality📡 Detection & Monitoring
Log Indicators:
- Unauthorized access attempts to SUM services
- Unexpected process execution from SUM directories
Network Indicators:
- Unusual traffic patterns to SUM management ports (280, 443, 8080)
- External connections to internal SUM interfaces
SIEM Query:
source="SUM" AND (event="unauthorized" OR event="access denied")