CVE-2021-22507
📋 TL;DR
CVE-2021-22507 is an authentication bypass vulnerability in Micro Focus Operations Bridge Manager that allows remote attackers to gain unauthorized access without valid credentials. This affects versions 2019.05 through 2020.10 of the software, potentially exposing sensitive management interfaces.
💻 Affected Systems
- Micro Focus Operations Bridge Manager
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of the Operations Bridge Manager environment, allowing attackers to access all managed systems, modify configurations, exfiltrate sensitive data, and disrupt IT operations.
Likely Case
Unauthorized access to management interfaces leading to configuration changes, data theft, and potential lateral movement to connected systems.
If Mitigated
Limited impact if system is isolated behind strict network controls and access restrictions, though authentication bypass remains possible.
🎯 Exploit Status
Authentication bypass vulnerabilities typically have low exploitation complexity and are often weaponized quickly.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Update to version 2020.11 or later
Vendor Advisory: https://softwaresupport.softwaregrp.com/doc/KM03793283
Restart Required: Yes
Instructions:
1. Download the latest Operations Bridge Manager update from Micro Focus support portal. 2. Backup current configuration. 3. Apply the update following vendor documentation. 4. Restart the Operations Bridge Manager services.
🔧 Temporary Workarounds
Network Isolation
allRestrict network access to Operations Bridge Manager to only trusted administrative networks
Use firewall rules to limit access to specific IP ranges
Access Control Lists
allImplement additional network-level authentication controls
Configure network devices to require authentication before reaching OBM interface
🧯 If You Can't Patch
- Isolate the Operations Bridge Manager instance behind a firewall with strict IP-based access controls
- Implement a web application firewall (WAF) with rules to detect and block authentication bypass attempts
🔍 How to Verify
Check if Vulnerable:
Check Operations Bridge Manager version via web interface or configuration files. If version is 2019.05, 2019.11, 2020.05, or 2020.10, system is vulnerable.Check Version:
Check web interface login page or consult OBM documentation for version checking commands specific to your installation.Verify Fix Applied:
Verify version is 2020.11 or later and test authentication functionality to ensure proper access controls are enforced.📡 Detection & Monitoring
Log Indicators:
- Failed authentication attempts followed by successful access from same source
- Access from unexpected IP addresses
- Authentication logs showing bypass patterns
Network Indicators:
- Unusual authentication request patterns
- Direct access to protected endpoints without proper authentication flow
SIEM Query:
source="obm_logs" AND (event_type="auth_failure" AND event_type="auth_success" FROM same_ip WITHIN 5s)