Micro Focus Access Manager Information Leakage Vulnerability (CVE-2021-22506) Security Advisory & Mitigation Guide
Executive & SecOps Summary
SECOPS ASSESSMENTAll versions of Micro Focus Access Manager prior to version 5.0
Unauthenticated remote attackers can exploit the Advance Configuration vulnerability to leak sensitive system configuration and credentials
Immediately upgrade to Micro Focus Access Manager version 5.0 or higher, and restrict external access to the administration interface
Affected Products & Version Scope
Remediation & Live Workaround Commands
PATCH & WORKAROUND1. Official Patch & Version Upgrade Commands
The primary remediation is to upgrade Micro Focus Access Manager to version 5.0 or later. Below is an example of the upgrade procedure on a Linux-based Access Manager appliance.
# 1. Verify the currently installed Access Manager version
rpm -qa | grep -i 'novell-access'
# 2. Extract the downloaded official patch archive
tar -zxvf AM_50_Update.tar.gz
cd AM_50_Update
# 3. Execute the installation script with root privileges
sudo ./install.sh2. Temporary Workaround & Hardening Configuration
If patching cannot be applied immediately, restrict access to the administration and advanced configuration endpoints using a reverse proxy or firewall rules.
# Nginx configuration snippet to restrict access to administrative endpoints
server {
listen 443 ssl;
server_name access.company.local;
# Restrict access to the administration console path
location /nps/ {
allow 10.0.0.0/8; # Allow internal trusted network
allow 192.168.1.0/24; # Allow administrator subnet
deny all; # Block all other external traffic
proxy_pass https://backend_access_manager;
}
}3. Log Audit & IoC Verification Commands
Audit the Access Manager web server logs to detect unauthorized access attempts to configuration endpoints.
# Scan Tomcat access logs for successful (200 OK) requests to administrative paths from external IPs
grep -E '/nps/|/adv/' /var/opt/novell/nam/logs/tomcat/catalina.out | grep ' 200 ' | awk '{print $1, $7, $9}'Stop Exposing VPN Ports to the Internet — Switch to Zero-Trust Access
Eliminate public-facing VPN concentrators and firewall management ports with identity-first Zero-Trust Network Access.
Technical Root Cause & Exploitation Mechanics
1. Vulnerability Overview & Root Cause
This vulnerability (CVE-2021-22506) is an information leakage flaw residing in the Advance Configuration component of Micro Focus Access Manager (now OpenText). The root cause stems from improper access control and exposure of sensitive configuration endpoints without adequate authentication. This allows remote attackers to query internal system parameters and configuration details.
2. Exploitation Mechanics & Attack Scenario
An unauthenticated attacker can send crafted HTTP requests targeting specific administrative or configuration paths of the Access Manager. Because the application fails to properly validate session privileges for these advanced configuration endpoints, the server responds with sensitive data, potentially including internal IP addresses, LDAP configuration details, or encrypted credentials. This vulnerability is actively exploited in the wild and is listed in the CISA KEV catalog.
3. Infrastructure & Business Impact
Since Access Manager serves as the central Identity and Access Management (IAM) hub for enterprise Single Sign-On (SSO), any information disclosure from this system is critical. Attackers can leverage the leaked configuration details to conduct lateral movement, compromise Active Directory, or gain unauthorized access to internal business-critical applications.
Official Vendor Advisories & References
Advance configuration exposing Information Leakage vulnerability in Micro Focus Access Manager product, affects all versions prior to version 5.0. The vulnerability could cause information leakage.
Frequently Asked SecOps Questions (CVE-2021-22506)
FAQQ1. How critical is CVE-2021-22506 and is it actively exploited in the wild?
CVE-2021-22506 is rated CVSS 7.5 (HIGH) with a 30-day EPSS exploitation probability of 25.7%. It is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, requiring immediate emergency remediation.
Q2. Which vendors and products are affected by CVE-2021-22506?
Primary impacted vendors include micro focus, opentext across access manager. Scope summary: All versions of Micro Focus Access Manager prior to version 5.0
Q3. What temporary mitigations or workarounds exist for CVE-2021-22506 before patching?
[Mitigation] Immediately upgrade to Micro Focus Access Manager version 5.0 or higher, and restrict external access to the administration interface Follow the CLI remediation commands and interactive SecOps checklist on this page to restrict exposure prior to your maintenance window.
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