CVE-2020-11188
📋 TL;DR
This vulnerability is a buffer over-read in Qualcomm Snapdragon chipsets when parsing SDP values without proper NULL termination checks. It allows attackers to read memory beyond allocated buffers, potentially exposing sensitive information. Affected devices include various Snapdragon-based automotive, mobile, IoT, and wearable products.
💻 Affected Systems
- Snapdragon Auto
- Snapdragon Compute
- Snapdragon Connectivity
- 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
Information disclosure leading to exposure of sensitive data, potential memory corruption enabling arbitrary code execution, or device compromise.
Likely Case
Information disclosure of adjacent memory contents, potentially revealing device identifiers, configuration data, or other sensitive information.
If Mitigated
Limited impact with proper network segmentation and access controls preventing malicious SDP packets from reaching vulnerable devices.
🎯 Exploit Status
Exploitation requires sending specially crafted SDP packets to vulnerable devices, but specific exploit details are not publicly documented.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: March 2021 security updates from Qualcomm and device manufacturers
Vendor Advisory: https://www.qualcomm.com/company/product-security/bulletins/march-2021-bulletin
Restart Required: Yes
Instructions:
1. Check with device manufacturer for available firmware updates. 2. Apply Qualcomm-provided patches through OEM update channels. 3. Reboot device after update installation.
🔧 Temporary Workarounds
Network segmentation
allIsolate vulnerable devices from untrusted networks to prevent malicious SDP packets
Disable unnecessary SDP services
allIf possible, disable SDP services not required for device functionality
🧯 If You Can't Patch
- Implement strict network access controls to limit SDP traffic to trusted sources only
- Monitor network traffic for anomalous SDP packets and implement intrusion detection
🔍 How to Verify
Check if Vulnerable:
Check device firmware version against manufacturer's patched versions. Use Qualcomm's security bulletin to identify vulnerable chipset versions.Check Version:
Device-specific commands vary by manufacturer. Typically: Android - Settings > About phone > Build number; Linux-based - cat /proc/version or manufacturer-specific commands.Verify Fix Applied:
Verify firmware version has been updated to March 2021 or later security patch level. Check with device manufacturer for specific patch verification.📡 Detection & Monitoring
Log Indicators:
- Memory access violation logs
- Unexpected process crashes related to SDP services
- Kernel panic or system instability
Network Indicators:
- Unusual SDP packet patterns
- SDP packets with malformed or oversized values
- SDP traffic from unexpected sources
SIEM Query:
Search for: (event_type:crash AND process:sdp*) OR (network_protocol:sdp AND packet_size:>threshold)