CVE-2023-25645
📋 TL;DR
This vulnerability in ZTE AndroidTV set-top boxes allows non-privileged applications to bypass permission controls and execute protected functions. Attackers could exploit this to clear user data and applications, potentially disrupting device operation. Only users of affected ZTE AndroidTV STBs are impacted.
💻 Affected Systems
- ZTE AndroidTV Set-Top Boxes
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device wipe with loss of all personal data, applications, and settings, requiring factory reset and reconfiguration.
Likely Case
Malicious app clears user data and installed applications, causing service disruption and data loss.
If Mitigated
Proper permission controls prevent unauthorized access, limiting impact to intended app functionality only.
🎯 Exploit Status
Exploitation requires installing a malicious application on the device; no authentication bypass needed once app is installed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified in public advisory
Vendor Advisory: https://support.zte.com.cn/support/news/LoopholeInfoDetail.aspx?newsId=1031464
Restart Required: Yes
Instructions:
1. Contact ZTE support for specific patch information. 2. Apply firmware updates provided by ZTE. 3. Restart device after update completion.
🔧 Temporary Workarounds
Restrict App Installation
allPrevent installation of untrusted applications on the device
Enable 'Install unknown apps' restriction in Android settings
Disable Unnecessary Permissions
allReview and restrict app permissions to minimum required
Navigate to Settings > Apps > [App Name] > Permissions
🧯 If You Can't Patch
- Isolate affected devices on separate network segment
- Implement application allowlisting to prevent unauthorized app installation
🔍 How to Verify
Check if Vulnerable:
Check device model and firmware version against ZTE advisory; test with permission auditing tools if available.Check Version:
Settings > About > Build number / Software versionVerify Fix Applied:
Verify firmware version matches patched version from ZTE; test permission controls with security testing tools.📡 Detection & Monitoring
Log Indicators:
- Unexpected permission grants to non-privileged apps
- App clearance or data deletion events from unprivileged sources
Network Indicators:
- Unusual app installation traffic to device
- Communication with unknown app repositories
SIEM Query:
Event logs showing app permission escalation or data clearance from non-system apps