CVE-2021-30261
📋 TL;DR
This vulnerability allows attackers to trigger integer and heap overflows by sending specially crafted beacon template update commands to affected Qualcomm Snapdragon chipsets. Successful exploitation could lead to arbitrary code execution or denial of service. It affects various Snapdragon platforms used in automotive, IoT, mobile, wearables, and consumer devices.
💻 Affected Systems
- Snapdragon Auto
- Snapdragon Consumer IOT
- Snapdragon Industrial IOT
- Snapdragon IoT
- Snapdragon Mobile
- Snapdragon Voice & Music
- Snapdragon Wearables
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution with kernel privileges, allowing complete device compromise, data theft, or persistent backdoor installation.
Likely Case
Denial of service causing device crashes or instability, potentially requiring physical reset.
If Mitigated
Limited impact if proper input validation and memory protections are implemented at the firmware/OS level.
🎯 Exploit Status
Exploitation requires sending crafted commands to the chipset interface; complexity depends on system access and chipset protections.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Refer to Qualcomm's August 2021 security bulletin for specific patched firmware versions.
Vendor Advisory: https://www.qualcomm.com/company/product-security/bulletins/august-2021-bulletin
Restart Required: Yes
Instructions:
1. Check device manufacturer for firmware updates. 2. Apply Qualcomm-provided patches through OEM updates. 3. Reboot device after update.
🔧 Temporary Workarounds
Network Segmentation
allRestrict access to chipset management interfaces to trusted networks only.
Input Validation at OS Level
linuxImplement additional input validation in the OS driver before passing commands to the chipset.
🧯 If You Can't Patch
- Isolate affected devices on segmented networks with strict access controls.
- Monitor for unusual chipset command activity and implement application whitelisting.
🔍 How to Verify
Check if Vulnerable:
Check device firmware version against Qualcomm's advisory; use 'getprop ro.bootloader' or similar on Android devices to identify chipset version.Check Version:
On Android: 'getprop ro.bootloader' or 'cat /proc/version'; on embedded Linux: check firmware version via vendor-specific commands.Verify Fix Applied:
Verify firmware version has been updated to a patched release listed in Qualcomm's bulletin.📡 Detection & Monitoring
Log Indicators:
- Unexpected beacon template update commands in chipset logs
- Kernel panic or crash logs related to memory corruption
Network Indicators:
- Unusual traffic to chipset management ports
- Malformed network packets targeting chipset interfaces
SIEM Query:
Search for logs containing 'beacon template update' errors or memory allocation failures in kernel logs.