CVE-2021-30282
📋 TL;DR
This vulnerability allows attackers to write data outside the intended memory boundaries in Qualcomm Snapdragon chipsets due to improper validation of partition counts in RAM partition tables. It affects multiple Snapdragon product lines including Auto, Compute, Connectivity, Consumer IoT, Industrial IoT, Voice & Music, and Wired Infrastructure and Networking. Successful exploitation could lead to arbitrary code execution or system crashes.
💻 Affected Systems
- Snapdragon Auto
- Snapdragon Compute
- Snapdragon Connectivity
- Snapdragon Consumer IOT
- Snapdragon Industrial IOT
- Snapdragon Voice & Music
- Snapdragon Wired Infrastructure and Networking
📦 What is this software?
Sd7c Firmware by Qualcomm
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution with kernel privileges leading to complete device compromise, data theft, or persistent backdoor installation.
Likely Case
System instability, crashes, denial of service, or limited code execution depending on exploit sophistication.
If Mitigated
System remains stable with proper input validation and memory protection mechanisms in place.
🎯 Exploit Status
Exploitation requires crafting malicious partition table data, but no public proof-of-concept is available. The vulnerability is in firmware/hardware layer.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Device-specific firmware updates from manufacturers
Vendor Advisory: https://www.qualcomm.com/company/product-security/bulletins/december-2021-bulletin
Restart Required: Yes
Instructions:
1. Check with device manufacturer for firmware updates. 2. Apply manufacturer-provided firmware patches. 3. Reboot device to activate fixes.
🔧 Temporary Workarounds
Input Validation Enhancement
allImplement additional validation for partition table data before processing
Memory Protection
allEnable hardware memory protection features if available
🧯 If You Can't Patch
- Isolate affected devices from untrusted networks
- Implement strict access controls and monitoring for affected systems
🔍 How to Verify
Check if Vulnerable:
Check device chipset model and firmware version against manufacturer advisoriesCheck Version:
Device-specific commands vary by manufacturer (e.g., 'cat /proc/cpuinfo' for chipset info on Linux)Verify Fix Applied:
Verify firmware version has been updated to manufacturer's patched version📡 Detection & Monitoring
Log Indicators:
- Kernel panic logs
- Memory corruption warnings
- Unexpected system reboots
Network Indicators:
- Unusual memory access patterns from external sources
SIEM Query:
Search for kernel panic events or memory access violations on affected devices