CVE-2024-34399
📋 TL;DR
CVE-2024-34399 is a critical authentication bypass vulnerability in BMC Remedy Mid Tier 7.6.04 that allows unauthenticated remote attackers to access any user account without credentials. This affects organizations running the unsupported 7.6.04 version of BMC Remedy Mid Tier. The vulnerability is particularly dangerous because it requires no authentication and has a CVSS score of 9.8.
💻 Affected Systems
- BMC Remedy Mid Tier
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of all user accounts, unauthorized access to sensitive data, privilege escalation to administrative functions, and potential lateral movement within the network.
Likely Case
Unauthorized access to user accounts leading to data theft, manipulation of service desk tickets, and potential business process disruption.
If Mitigated
Limited impact if system is isolated behind strict network controls, but authentication bypass still presents significant risk.
🎯 Exploit Status
The vulnerability description indicates unauthenticated remote access, suggesting trivial exploitation. No public PoC has been identified, but the nature of the vulnerability makes weaponization likely.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: N/A
Vendor Advisory: https://www.gruppotim.it/it/footer/red-team.html
Restart Required: No
Instructions:
No official patch is available as this version is unsupported. The only secure option is to upgrade to a supported version of BMC Remedy Mid Tier.
🔧 Temporary Workarounds
Network Isolation
allRestrict network access to BMC Remedy Mid Tier instances to only trusted IP addresses and networks
Use firewall rules to restrict access: iptables -A INPUT -p tcp --dport [BMC_PORT] -s [TRUSTED_NETWORK] -j ACCEPT
iptables -A INPUT -p tcp --dport [BMC_PORT] -j DROP
Web Application Firewall
allImplement WAF rules to detect and block authentication bypass attempts
Configure WAF to monitor for unusual authentication patterns and block suspicious requests
🧯 If You Can't Patch
- Immediately isolate affected systems from internet access and restrict internal network access
- Implement additional authentication layers such as VPN or reverse proxy with strong authentication
🔍 How to Verify
Check if Vulnerable:
Check the BMC Remedy Mid Tier version. If it's exactly 7.6.04, the system is vulnerable. Attempt to access user accounts without credentials to confirm vulnerability.Check Version:
Check the BMC Remedy Mid Tier administration console or configuration files for version information specific to 7.6.04Verify Fix Applied:
Since no patch exists, verify workarounds by testing that unauthenticated access is blocked and only authorized users can access accounts.📡 Detection & Monitoring
Log Indicators:
- Multiple failed authentication attempts followed by successful access without credentials
- User logins from unexpected IP addresses or locations
- Administrative actions performed by non-admin users
Network Indicators:
- Unusual authentication request patterns to BMC Remedy endpoints
- Traffic to BMC Remedy from unauthorized IP addresses
SIEM Query:
source="BMC_Remedy_Logs" AND (event_type="authentication" AND result="success" AND auth_method="none") OR (user="*" AND source_ip NOT IN [allowed_ips])