CVE-2020-6932
📋 TL;DR
This vulnerability in the BlackBerry QNX slinger web server allows attackers to read arbitrary files and execute arbitrary code with web server privileges. It affects QNX Software Development Platform versions 6.4.0 through 6.6.0. Systems using these versions with the slinger web server enabled are vulnerable.
💻 Affected Systems
- BlackBerry QNX Software Development Platform
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing attacker to read sensitive files, execute arbitrary code, and potentially gain persistent access to the QNX system.
Likely Case
Information disclosure of sensitive configuration files and credentials, followed by remote code execution to install malware or pivot to other systems.
If Mitigated
Limited impact if web server runs with minimal privileges and network access is restricted, though file reading may still expose sensitive data.
🎯 Exploit Status
The vulnerability allows unauthenticated exploitation via the web server interface, making it relatively easy to exploit if accessible.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 6.6.0 SP1 and later
Vendor Advisory: http://support.blackberry.com/kb/articleDetail?articleNumber=000061411
Restart Required: Yes
Instructions:
1. Download the patch from BlackBerry support site. 2. Apply the patch to affected QNX systems. 3. Restart the slinger web server or the entire system.
🔧 Temporary Workarounds
Disable slinger web server
qnxStop and disable the vulnerable web server component if not required.
slay slinger
disable slinger from startup scripts
Network segmentation
allRestrict network access to the slinger web server using firewalls.
Configure firewall to block external access to slinger port (default 8080)
🧯 If You Can't Patch
- Implement strict network access controls to limit who can reach the slinger web server
- Monitor for unusual file access patterns or unexpected process execution from the web server
🔍 How to Verify
Check if Vulnerable:
Check QNX version and if slinger web server is running: 'uname -a' and 'pidin | grep slinger'Check Version:
uname -aVerify Fix Applied:
Verify version is 6.6.0 SP1 or later and slinger has been restarted after patching📡 Detection & Monitoring
Log Indicators:
- Unusual file access patterns in slinger logs
- Unexpected process execution from slinger user context
Network Indicators:
- HTTP requests to slinger attempting path traversal patterns
- Unusual outbound connections from slinger process
SIEM Query:
source="slinger.log" AND (path=".." OR cmd="exec")