CVE-2020-3628
📋 TL;DR
This vulnerability in Qualcomm Snapdragon chipsets allows improper access due to a logging application opening a socket without binding to localhost. Attackers can potentially execute arbitrary code or access sensitive data on affected devices. It affects Snapdragon Consumer IOT and Mobile platforms in specific chipsets.
💻 Affected Systems
- Snapdragon Consumer IOT
- Snapdragon Mobile
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution with root privileges leading to complete device compromise, data theft, and persistent backdoor installation.
Likely Case
Unauthorized access to system resources, privilege escalation, and potential data exfiltration from affected devices.
If Mitigated
Limited impact with proper network segmentation and access controls preventing external access to vulnerable services.
🎯 Exploit Status
CVSS 9.8 indicates critical severity with network-based attack vector and no authentication required. Specific exploit details not publicly documented.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Refer to Qualcomm June 2020 security bulletin for specific patch versions
Vendor Advisory: https://www.qualcomm.com/company/product-security/bulletins/june-2020-bulletin
Restart Required: Yes
Instructions:
1. Check device manufacturer for firmware updates. 2. Apply Qualcomm-provided patches through OEM updates. 3. Reboot device after patch installation. 4. Verify patch application through version checks.
🔧 Temporary Workarounds
Network Access Restriction
linuxRestrict network access to affected devices using firewall rules to prevent external exploitation
iptables -A INPUT -p tcp --dport [PORT] -j DROP
iptables -A INPUT -p udp --dport [PORT] -j DROP
Service Disablement
linuxDisable the vulnerable logging service if not required for device operation
systemctl stop [SERVICE_NAME]
systemctl disable [SERVICE_NAME]
🧯 If You Can't Patch
- Segment affected devices in isolated network zones with strict access controls
- Implement host-based firewalls to block all unnecessary inbound connections
🔍 How to Verify
Check if Vulnerable:
Check device chipset version and firmware against Qualcomm's affected list. Use 'cat /proc/cpuinfo' to identify chipset.Check Version:
cat /proc/cpuinfo | grep -i qualcommVerify Fix Applied:
Verify firmware version has been updated to post-June 2020 patches. Check with device manufacturer for specific version verification.📡 Detection & Monitoring
Log Indicators:
- Unexpected connections to logging service ports
- Unauthorized access attempts to system logs
- Abnormal process creation from logging services
Network Indicators:
- Unusual network traffic to logging service ports from unauthorized sources
- Port scans targeting vulnerable service ports
SIEM Query:
source_port=* AND dest_port=[LOGGING_PORT] AND action=denied OR action=allowed FROM unknown_sources