CVE-2021-1972
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary code on affected Qualcomm Snapdragon devices due to a buffer overflow in the P2P search functionality. Attackers can exploit improper validation of device types to trigger memory corruption. This affects numerous Snapdragon product lines across automotive, mobile, IoT, and networking devices.
💻 Affected Systems
- Snapdragon Auto
- Snapdragon Compute
- Snapdragon Connectivity
- Snapdragon Consumer IOT
- Snapdragon Industrial IOT
- Snapdragon Mobile
- Snapdragon Voice & Music
- Snapdragon Wearables
- Snapdragon Wired Infrastructure and Networking
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution with full system compromise, allowing attackers to take complete control of affected devices, install malware, or exfiltrate sensitive data.
Likely Case
Remote code execution leading to device compromise, potential data theft, or device becoming part of a botnet.
If Mitigated
Denial of service or limited information disclosure if exploit attempts are detected and blocked by security controls.
🎯 Exploit Status
CVSS 9.8 indicates critical severity with network attack vector and no authentication required. No public exploit code was available at advisory publication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Refer to device manufacturer updates; Qualcomm provides patches to OEMs.
Vendor Advisory: https://www.qualcomm.com/company/product-security/bulletins/august-2021-bulletin
Restart Required: Yes
Instructions:
1. Check with device manufacturer for firmware/software updates. 2. Apply manufacturer-provided patches. 3. Reboot device after update. 4. Verify patch installation through version checks.
🔧 Temporary Workarounds
Disable P2P functionality
allDisable Wi-Fi Direct/P2P search features on affected devices if not required.
Device-specific commands vary by manufacturer; check device settings for Wi-Fi Direct/P2P options.
Network segmentation
allIsolate affected devices on separate network segments to limit attack surface.
Configure network ACLs/firewalls to restrict P2P traffic between untrusted networks.
🧯 If You Can't Patch
- Implement strict network access controls to limit device exposure
- Monitor for unusual P2P network activity and exploit attempts
🔍 How to Verify
Check if Vulnerable:
Check device firmware version against manufacturer's patched versions. Use Qualcomm's advisory to identify affected chipset versions.Check Version:
Device-specific; typically 'adb shell getprop ro.build.version' for Android devices or manufacturer-specific commands.Verify Fix Applied:
Verify firmware version has been updated to manufacturer's patched version. Check that P2P functionality works without crashes.📡 Detection & Monitoring
Log Indicators:
- Unexpected device crashes or reboots
- Log entries related to P2P/Wi-Fi Direct failures
- Memory corruption errors in system logs
Network Indicators:
- Unusual P2P discovery traffic patterns
- Malformed P2P packets targeting vulnerable devices
SIEM Query:
Search for: 'P2P search failure' OR 'buffer overflow' OR 'memory corruption' in device logs, combined with network traffic to port 5000-5002 (common P2P ports).