CVE-2020-11176
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary code or cause denial of service via heap overflow during IPSec certificate validation in Qualcomm Snapdragon chipsets. It affects devices using vulnerable Snapdragon processors across automotive, compute, mobile, and IoT platforms. Attackers can exploit this by sending malicious certificates to IPSec servers.
💻 Affected Systems
- Snapdragon Auto
- Snapdragon Compute
- Snapdragon Connectivity
- Snapdragon Consumer IOT
- Snapdragon Industrial IOT
- Snapdragon IoT
- Snapdragon Mobile
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete device compromise, data theft, or persistent backdoor installation
Likely Case
Denial of service causing device crashes or instability, potentially leading to remote control
If Mitigated
Limited impact if IPSec is disabled or network segmentation prevents external access
🎯 Exploit Status
Exploitation requires sending malicious certificates to IPSec servers, but specific exploit details are not publicly documented
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Vendor-specific firmware updates released June 2021
Vendor Advisory: https://www.qualcomm.com/company/product-security/bulletins/june-2021-bulletin
Restart Required: Yes
Instructions:
1. Check with device manufacturer for firmware updates. 2. Apply Qualcomm-provided patches through OEM update channels. 3. Reboot device after update.
🔧 Temporary Workarounds
Disable IPSec
allTemporarily disable IPSec VPN functionality if not required
Device-specific - consult manufacturer documentation
Network Segmentation
allRestrict access to IPSec servers to trusted networks only
firewall rules to limit IPSec port 500/4500 access
🧯 If You Can't Patch
- Implement strict network access controls to limit IPSec server exposure
- Monitor IPSec connections for anomalous certificate patterns
🔍 How to Verify
Check if Vulnerable:
Check device firmware version against manufacturer's patched versions listCheck Version:
Device-specific - typically 'getprop' on Android or manufacturer diagnostic toolsVerify Fix Applied:
Confirm firmware version is post-June 2021 and check Qualcomm security bulletin for specific patch levels📡 Detection & Monitoring
Log Indicators:
- IPSec connection failures
- Certificate validation errors
- System crashes during VPN handshake
Network Indicators:
- Unusual IPSec connection attempts
- Malformed certificate packets to port 500/4500
SIEM Query:
source_port:500 OR source_port:4500 AND (certificate_error OR heap_overflow)