CVE-2015-4683
📋 TL;DR
This vulnerability in Polycom RealPresence Resource Manager (RPRM) allows attackers to obtain sensitive information and potentially gain elevated privileges by exploiting session identifiers transmitted via HTTP GET requests. Attackers can leverage this to access unauthorized data or compromise the system. Organizations using Polycom RPRM versions before 8.4 are affected.
💻 Affected Systems
- Polycom RealPresence Resource Manager (RPRM)
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with administrative privileges, allowing complete control over the RPRM system and potential lateral movement to connected systems.
Likely Case
Unauthorized access to sensitive configuration data, session hijacking, and privilege escalation within the RPRM application.
If Mitigated
Limited information disclosure with no privilege escalation if proper network segmentation and access controls are implemented.
🎯 Exploit Status
Exploitation requires access to the web interface but doesn't require authentication. Public exploit details are available in security advisories.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 8.4 and later
Vendor Advisory: https://support.polycom.com/global/documents/support/documentation/Security_Center_Post_for_RPRM_CVEs.pdf
Restart Required: Yes
Instructions:
1. Download RPRM version 8.4 or later from Polycom support portal. 2. Backup current configuration. 3. Apply the update following Polycom's upgrade documentation. 4. Restart the RPRM system. 5. Verify the update was successful.
🔧 Temporary Workarounds
Network Segmentation
allRestrict access to RPRM web interface to authorized networks only
Web Application Firewall Rules
allImplement WAF rules to block exploitation attempts targeting session parameters
🧯 If You Can't Patch
- Implement strict network access controls to limit RPRM web interface access to trusted IP addresses only
- Deploy a web application firewall (WAF) with rules specifically targeting session parameter manipulation in GET requests
🔍 How to Verify
Check if Vulnerable:
Check RPRM web interface version via admin console or by examining HTTP response headers for version informationCheck Version:
Connect to RPRM web interface and check System Information or About page for version detailsVerify Fix Applied:
Verify RPRM version is 8.4 or higher and test that session identifiers are no longer transmitted via GET parameters📡 Detection & Monitoring
Log Indicators:
- Unusual access patterns to RPRM web interface
- Multiple failed authentication attempts followed by successful access
- Requests with session parameters in URL query strings
Network Indicators:
- HTTP GET requests containing session identifiers in URL parameters to RPRM systems
- Traffic from unexpected source IPs accessing RPRM web interface
SIEM Query:
source="RPRM" AND (url="*session*" OR url="*token*" OR url="*sid*") AND method="GET"🔗 References
- http://packetstormsecurity.com/files/132463/Polycom-RealPresence-Resource-Manager-RPRM-Disclosure-Traversal.html
- http://seclists.org/fulldisclosure/2015/Jun/81
- http://www.securityfocus.com/archive/1/535852/100/0/threaded
- http://www.securityfocus.com/bid/75432
- https://support.polycom.com/global/documents/support/documentation/Security_Center_Post_for_RPRM_CVEs.pdf
- https://www.exploit-db.com/exploits/37449/
- http://packetstormsecurity.com/files/132463/Polycom-RealPresence-Resource-Manager-RPRM-Disclosure-Traversal.html
- http://seclists.org/fulldisclosure/2015/Jun/81
- http://www.securityfocus.com/archive/1/535852/100/0/threaded
- http://www.securityfocus.com/bid/75432
- https://support.polycom.com/global/documents/support/documentation/Security_Center_Post_for_RPRM_CVEs.pdf
- https://www.exploit-db.com/exploits/37449/
