CVE-2020-12483
📋 TL;DR
This vulnerability in Vivo appstore before version 8.12.0.0 allows attackers to remotely download and install arbitrary applications by exploiting exposed components with crafted parameters. It affects users of Vivo devices with vulnerable appstore versions, potentially enabling unauthorized app installation without user consent.
💻 Affected Systems
- Vivo Appstore
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could install malicious apps that steal sensitive data, gain persistent access, or perform other harmful actions on affected devices.
Likely Case
Malicious apps installed without user knowledge, potentially leading to data theft, ad fraud, or device compromise.
If Mitigated
Limited impact if network controls prevent external exploitation or if app installation requires additional user permissions.
🎯 Exploit Status
Vulnerability involves exposed components with insufficient validation, making exploitation relatively straightforward once the attack vector is identified.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 8.12.0.0 and later
Vendor Advisory: https://www.vivo.com/en/support/security-advisory-detail?id=1
Restart Required: Yes
Instructions:
1. Open Vivo Appstore on affected device. 2. Check for updates in settings. 3. Update to version 8.12.0.0 or later. 4. Restart device after update.
🔧 Temporary Workarounds
Disable automatic app installation
androidRequire manual approval for all app installations
Navigate to Settings > Security > Install unknown apps > Disable for Appstore
Network segmentation
allRestrict network access to vulnerable devices
🧯 If You Can't Patch
- Isolate affected devices from untrusted networks
- Monitor for unexpected app installations and network traffic
🔍 How to Verify
Check if Vulnerable:
Check Appstore version in device settings. If version is below 8.12.0.0, device is vulnerable.Check Version:
Settings > Apps > Appstore > App infoVerify Fix Applied:
Confirm Appstore version is 8.12.0.0 or higher after update.📡 Detection & Monitoring
Log Indicators:
- Unexpected app installation events
- Appstore component access from unusual sources
Network Indicators:
- Unusual outbound connections from appstore
- Unexpected download traffic
SIEM Query:
app_install event where source=external AND appstore_version<8.12.0.0