CVE-2023-43016
📋 TL;DR
This vulnerability allows remote attackers to log into IBM Security Access Manager servers using a user account with an empty password. It affects IBM Security Verify Access Appliance and Docker container deployments. The issue stems from a default configuration weakness (CWE-258).
💻 Affected Systems
- IBM Security Verify Access Appliance
- IBM Security Verify Access Docker
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full administrative compromise of the security gateway, allowing attackers to bypass authentication, access sensitive data, and potentially pivot to internal networks.
Likely Case
Unauthorized access to the management interface, configuration tampering, and credential harvesting from authenticated sessions.
If Mitigated
Limited impact if strong network segmentation, monitoring, and compensating controls prevent access to vulnerable interfaces.
🎯 Exploit Status
Exploitation requires only knowledge of the vulnerable account name (not specified in public details) and attempting login with empty password.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 10.0.6.2 or later
Vendor Advisory: https://www.ibm.com/support/pages/node/7106586
Restart Required: Yes
Instructions:
1. Backup current configuration. 2. Upgrade to version 10.0.6.2 or later. 3. Restart the service/container. 4. Verify the fix by testing authentication.
🔧 Temporary Workarounds
Disable or secure vulnerable account
linuxIdentify and disable the account with empty password, or set a strong password.
# Check for accounts with empty passwords
# grep '^[^:]*::' /etc/shadow
# Set password for vulnerable account
# passwd <account_name>
Network access restrictions
linuxRestrict network access to management interfaces using firewall rules.
# Example iptables rule to restrict access
# iptables -A INPUT -p tcp --dport <management_port> -s <trusted_network> -j ACCEPT
# iptables -A INPUT -p tcp --dport <management_port> -j DROP
🧯 If You Can't Patch
- Implement strict network segmentation to isolate vulnerable systems from untrusted networks.
- Enable detailed authentication logging and monitor for failed/successful login attempts to the vulnerable account.
🔍 How to Verify
Check if Vulnerable:
Attempt to authenticate to the IBM Security Access Manager interface using the vulnerable account name (not publicly disclosed) with an empty password. If successful, the system is vulnerable.Check Version:
# On appliance/container:
# versioninfo.sh or check /opt/ibm/version.txtVerify Fix Applied:
After patching, attempt the same authentication test. It should fail. Also verify the installed version is 10.0.6.2 or higher.📡 Detection & Monitoring
Log Indicators:
- Successful authentication events for accounts with empty passwords
- Multiple failed login attempts followed by success without password complexity
- Authentication logs showing source IPs attempting empty password login
Network Indicators:
- Unusual authentication traffic to management ports from unexpected sources
- Traffic patterns indicating brute force or credential testing
SIEM Query:
source="ibm_security_access_manager" AND (event_type="authentication_success" AND password="" OR user="<vulnerable_account>")