CVE-2020-3678 – This CVE describes a buffer overflow vulnerabil... (How to Fix)

Q: What is the severity of CVE-2020-3678?

CVE-2020-3678 has a CVSS score of 7.8 (HIGH). This CVE describes a buffer overflow vulnerability in Qualcomm Snapdragon chipsets where improper API usage during UIE initialization could allow memory corruption. The vulnerability affects multiple Snapdragon platforms used in consumer IoT, industrial IoT, mobile devices, and networking infrastructure. Attackers could potentially execute arbitrary code or cause denial of service on affected devices.

📋 TL;DR

This CVE describes a buffer overflow vulnerability in Qualcomm Snapdragon chipsets where improper API usage during UIE initialization could allow memory corruption. The vulnerability affects multiple Snapdragon platforms used in consumer IoT, industrial IoT, mobile devices, and networking infrastructure. Attackers could potentially execute arbitrary code or cause denial of service on affected devices.

💻 Affected Systems

Products:

Snapdragon Consumer IOT
Snapdragon Industrial IOT
Snapdragon Mobile
Snapdragon Wired Infrastructure and Networking

Versions: Specific chipset versions: Agatti, Kamorta, QCS404, QCS605, SDA845, SDM670, SDM710, SDM845, SXR1130

Operating Systems: Android, Linux-based IoT systems

Default Config Vulnerable: ⚠️ Yes

Notes: Affects devices using vulnerable Snapdragon chipsets; exploitation requires specific API misuse patterns

📦 What is this software?

⚠️ Risk & Real-World Impact

🔴

Worst Case

Remote code execution leading to complete device compromise, data theft, or persistent backdoor installation

🟠

Likely Case

Local privilege escalation, denial of service, or application crashes

🟢

If Mitigated

Limited impact with proper memory protections and exploit mitigations in place

🌐 Internet-Facing: MEDIUM - Requires specific API misuse but could be exploited remotely if vulnerable services are exposed

🏢 Internal Only: MEDIUM - Local attackers could exploit this for privilege escalation on affected devices

🎯 Exploit Status

Public PoC: ✅ No

Weaponized: UNKNOWN

Unauthenticated Exploit: ✅ No

Complexity: MEDIUM

Exploitation requires understanding of the vulnerable API and ability to trigger the buffer overflow condition

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: Refer to Qualcomm October 2020 security bulletin for specific patch versions

Vendor Advisory: https://www.qualcomm.com/company/product-security/bulletins/october-2020-bulletin

Restart Required: Yes

Instructions:

1. Check device manufacturer for firmware updates. 2. Apply Qualcomm-provided patches. 3. Update device firmware. 4. Reboot device to apply changes.

🔧 Temporary Workarounds

API Usage Restrictions

all

Implement strict API usage controls and input validation for UIE initialization functions

Memory Protection

linux

Enable ASLR, DEP, and other memory protection mechanisms

🧯 If You Can't Patch

Isolate affected devices from untrusted networks
Implement strict access controls and monitor for abnormal behavior

🔍 How to Verify

Check if Vulnerable:

Check device chipset version and firmware against Qualcomm's advisory

Check Version:

cat /proc/cpuinfo | grep -i qualcomm

Verify Fix Applied:

Verify firmware version has been updated to post-October 2020 patches

📡 Detection & Monitoring

Log Indicators:

Kernel panics
Application crashes related to memory corruption
Abnormal API calls to UIE functions

Network Indicators:

Unusual outbound connections from IoT devices
Anomalous traffic patterns

SIEM Query:

search 'buffer overflow' OR 'segmentation fault' AND device_type:snapdragon

📊 Metadata

CVE ID: CVE-2020-3678

CVSS v3 Score: 7.8 (HIGH)

CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE: CWE-120

Published: November 2, 2020

Last Updated: November 21, 2024

🔗 References

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