CVE-2016-9176
📋 TL;DR
This CVE describes a stack buffer overflow vulnerability in Micro Focus Rumba's send.exe and receive.exe components. Local attackers or those able to inject arguments to these binaries can exploit it to execute arbitrary code. Systems running Rumba 9.4 and earlier are affected.
💻 Affected Systems
- Micro Focus Rumba
📦 What is this software?
Rumba by Microfocus
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with attacker gaining SYSTEM/root privileges, installing persistent backdoors, and pivoting to other systems.
Likely Case
Local privilege escalation allowing attackers to gain administrative access to the affected system.
If Mitigated
Limited impact if proper access controls prevent unauthorized users from executing these binaries or injecting arguments.
🎯 Exploit Status
Exploit requires local access or ability to control arguments passed to vulnerable binaries.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Rumba 9.5 or later
Vendor Advisory: https://www.microfocus.com/support-and-services/security-advisories/ssa-2016-001
Restart Required: Yes
Instructions:
1. Download Rumba 9.5 or later from Micro Focus support portal. 2. Backup existing configuration. 3. Install updated version. 4. Restart system.
🔧 Temporary Workarounds
Restrict Binary Execution
windowsRemove execute permissions for non-administrative users on send.exe and receive.exe
icacls "C:\Program Files\Micro Focus\Rumba\send.exe" /deny Users:(X)
icacls "C:\Program Files\Micro Focus\Rumba\receive.exe" /deny Users:(X)
Remove Vulnerable Binaries
windowsTemporarily rename or move vulnerable executables if not needed
ren "C:\Program Files\Micro Focus\Rumba\send.exe" send.exe.bak
ren "C:\Program Files\Micro Focus\Rumba\receive.exe" receive.exe.bak
🧯 If You Can't Patch
- Implement strict access controls to prevent unauthorized users from executing send.exe/receive.exe
- Monitor for suspicious process creation involving send.exe or receive.exe
🔍 How to Verify
Check if Vulnerable:
Check Rumba version in Help > About or examine file properties of send.exe/receive.exeCheck Version:
wmic product where "name like '%Rumba%'" get versionVerify Fix Applied:
Verify installed version is 9.5 or later and check that buffer overflow protections are enabled📡 Detection & Monitoring
Log Indicators:
- Unusual process creation of send.exe or receive.exe
- Access denied errors for these binaries from non-admin users
Network Indicators:
- Unusual outbound connections from systems running vulnerable Rumba versions
SIEM Query:
ProcessName="send.exe" OR ProcessName="receive.exe" | stats count by host, user