CVE-2018-19275
📋 TL;DR
This vulnerability allows remote attackers to gain unauthorized access to Mitel InAttend and CMG Suite Servers due to a default password in the BluStar component. Attackers can execute arbitrary scripts, potentially compromising confidentiality, integrity, and availability. Organizations using affected versions of these Mitel products are at risk.
💻 Affected Systems
- Mitel InAttend
- Mitel CMG Suite Servers
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing attackers to execute arbitrary code, steal sensitive data, disrupt operations, and pivot to other network systems.
Likely Case
Unauthorized access leading to data exfiltration, configuration changes, or service disruption through script execution.
If Mitigated
Limited impact if systems are isolated, monitored, and have strong network controls preventing external access.
🎯 Exploit Status
Default password vulnerabilities are trivial to exploit with basic scanning tools.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: InAttend 2.5 SP3, CMG 8.4 SP3
Vendor Advisory: https://www.mitel.com/en-gb/support/security-advisories/mitel-product-security-advisory-19-0002
Restart Required: Yes
Instructions:
1. Download patches from Mitel support portal. 2. Apply InAttend 2.5 SP3 or CMG 8.4 SP3. 3. Restart affected servers. 4. Change default passwords after patching.
🔧 Temporary Workarounds
Change Default Password
allImmediately change the default BluStar component password to a strong, unique credential.
Use Mitel administration interface to change BluStar component password
Network Isolation
allRestrict network access to affected servers using firewalls or network segmentation.
Configure firewall rules to limit access to trusted IPs only
🧯 If You Can't Patch
- Isolate affected systems from internet and untrusted networks
- Implement strict network monitoring and alerting for unauthorized access attempts
🔍 How to Verify
Check if Vulnerable:
Check system version in Mitel administration interface: InAttend versions before 2.5 SP3 or CMG versions before 8.4 SP3 are vulnerable.Check Version:
Use Mitel administration console to view system version informationVerify Fix Applied:
Confirm version shows InAttend 2.5 SP3 or CMG 8.4 SP3 in administration interface and test that default password no longer works.📡 Detection & Monitoring
Log Indicators:
- Failed authentication attempts followed by successful access
- Unauthorized script execution events
- Changes to BluStar component configuration
Network Indicators:
- Unexpected remote connections to BluStar service ports
- Traffic patterns indicating credential brute-forcing
SIEM Query:
source="mitel_server" AND (event_type="authentication" AND result="success" AND user="default") OR (process_execution AND parent_process="blustar")🔗 References
- https://www.mitel.com/-/media/mitel/pdf/security-advisories/security-bulletin-190002001-v10.pdf
- https://www.mitel.com/en-gb/support/security-advisories/mitel-product-security-advisory-19-0002
- https://www.mitel.com/-/media/mitel/pdf/security-advisories/security-bulletin-190002001-v10.pdf
- https://www.mitel.com/en-gb/support/security-advisories/mitel-product-security-advisory-19-0002
