CVE-2020-9257
📋 TL;DR
This buffer overflow vulnerability in Huawei P30 Pro smartphones allows attackers to execute arbitrary code by tricking users into installing malicious applications. The vulnerability occurs when handling certificate operations, enabling attackers to access memory outside intended buffer boundaries. Only Huawei P30 Pro devices running specific outdated Android versions are affected.
💻 Affected Systems
- HUAWEI P30 Pro
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise with full control over the smartphone, allowing data theft, surveillance, and persistence.
Likely Case
Malicious application gains elevated privileges to access sensitive data, install additional malware, or perform unauthorized actions.
If Mitigated
Limited impact with proper application vetting and user education preventing malicious app installation.
🎯 Exploit Status
Requires social engineering to trick users into installing malicious apps; no public exploit code available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 10.1.0.123(C432E19R2P5patch02), 10.1.0.126(C10E11R5P1), or 10.1.0.160(C00E160R2P8) depending on region
Vendor Advisory: https://www.huawei.com/en/psirt/security-advisories/huawei-sa-20200715-03-smartphone-en
Restart Required: Yes
Instructions:
1. Go to Settings > System & updates > Software update. 2. Check for updates. 3. Install available security update. 4. Restart device when prompted.
🔧 Temporary Workarounds
Restrict app installations
androidOnly allow app installations from trusted sources like Google Play Store or Huawei AppGallery
Settings > Security > Install unknown apps > Disable for all apps
Enable Google Play Protect
androidUse Google's built-in malware scanning for apps
Google Play Store > Menu > Play Protect > Turn on
🧯 If You Can't Patch
- Implement mobile device management (MDM) to restrict app installations to approved sources only
- Educate users about risks of installing apps from untrusted sources and implement application whitelisting
🔍 How to Verify
Check if Vulnerable:
Check Settings > About phone > Build number against affected version rangesCheck Version:
Settings > About phone > Build numberVerify Fix Applied:
Verify Build number matches or exceeds patched versions: 10.1.0.123(C432E19R2P5patch02), 10.1.0.126(C10E11R5P1), or 10.1.0.160(C00E160R2P8)📡 Detection & Monitoring
Log Indicators:
- Unusual certificate validation errors in system logs
- Unexpected app installation events
Network Indicators:
- Connections to suspicious app repositories
- Unusual outbound traffic from mobile devices
SIEM Query:
device.vendor:"Huawei" AND device.model:"P30 Pro" AND os.version:<"10.1.0.123" AND event.type:"app_install"