CVE-2021-30275
📋 TL;DR
This vulnerability is an integer overflow in Qualcomm Snapdragon chipsets that could allow attackers to execute arbitrary code or cause denial of service. It affects multiple Snapdragon product lines including Auto, Compute, Connectivity, Consumer IoT, Industrial IoT, Voice & Music, and Wired Infrastructure and Networking. The issue occurs due to insufficient validation of address and size parameters before alignment operations.
💻 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 leading to complete system compromise, allowing attackers to gain root privileges and control affected devices.
Likely Case
Denial of service through system crashes or instability, potentially requiring device reboots or causing service interruptions.
If Mitigated
Limited impact with proper network segmentation and access controls, potentially only affecting isolated components.
🎯 Exploit Status
Integer overflow vulnerabilities typically require specific conditions to trigger; exploitation may depend on system configuration and access vectors
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Refer to Qualcomm security bulletin for specific patched versions
Vendor Advisory: https://www.qualcomm.com/company/product-security/bulletins/december-2021-bulletin
Restart Required: Yes
Instructions:
1. Check Qualcomm security bulletin for affected chipset versions. 2. Contact device manufacturer for firmware updates. 3. Apply firmware updates provided by device vendor. 4. Reboot device after update installation.
🔧 Temporary Workarounds
Network Segmentation
allIsolate affected devices from untrusted networks to reduce attack surface
Access Control Restrictions
allImplement strict access controls to limit who can interact with vulnerable interfaces
🧯 If You Can't Patch
- Implement network segmentation to isolate vulnerable devices
- Deploy intrusion detection systems to monitor for exploitation attempts
🔍 How to Verify
Check if Vulnerable:
Check device specifications to determine if it uses affected Snapdragon chipsets; consult manufacturer documentationCheck Version:
Device-specific commands vary by manufacturer; typically 'cat /proc/version' or manufacturer-specific diagnostic toolsVerify Fix Applied:
Verify firmware version against patched versions listed in Qualcomm advisory; check with device manufacturer for update confirmation📡 Detection & Monitoring
Log Indicators:
- Kernel panic logs
- System crash dumps
- Unexpected process terminations
- Memory allocation failures
Network Indicators:
- Unusual network traffic to device management interfaces
- Attempts to access low-level system functions
SIEM Query:
Search for kernel panic events OR system crash events OR memory allocation failures on devices with Snapdragon chipsets