CVE-2022-48249
📋 TL;DR
CVE-2022-48249 is a missing permission check vulnerability in the audio service that allows local attackers to escalate privileges without requiring additional execution privileges. This affects systems running vulnerable versions of Unisoc audio service components, potentially allowing attackers to gain elevated system access.
💻 Affected Systems
- Unisoc audio service components
📦 What is this software?
Android by Google
Android by Google
Android by Google
Android by Google
⚠️ Risk & Real-World Impact
Worst Case
An attacker gains full system control (root/admin privileges) and can install persistent malware, exfiltrate sensitive data, or disable security controls.
Likely Case
Local user or malware gains elevated privileges to access protected system resources, modify system configurations, or bypass security restrictions.
If Mitigated
Attack is prevented through proper access controls, SELinux/AppArmor policies, or service isolation mechanisms.
🎯 Exploit Status
Exploitation requires local access but no special privileges; complexity is low due to missing permission check.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified in references; consult vendor for patched versions
Vendor Advisory: https://www.unisoc.com/en_us/secy/announcementDetail/1654776866982133761
Restart Required: Yes
Instructions:
1. Contact device manufacturer for security updates. 2. Apply vendor-provided patches for audio service. 3. Reboot device after patch installation.
🔧 Temporary Workarounds
Restrict audio service access
androidUse SELinux/AppArmor policies to restrict access to audio service components
# Consult device manufacturer for specific policy configurations
Disable unnecessary audio services
androidDisable audio services not required for device functionality
# Requires root access and device-specific knowledge
🧯 If You Can't Patch
- Implement strict access controls and principle of least privilege for user accounts
- Monitor for unusual privilege escalation attempts and suspicious audio service activity
🔍 How to Verify
Check if Vulnerable:
Check device manufacturer security bulletins and compare audio service version against patched releasesCheck Version:
# Device-specific; typically via 'getprop' or manufacturer diagnostic toolsVerify Fix Applied:
Verify audio service has been updated to patched version and test privilege escalation attempts📡 Detection & Monitoring
Log Indicators:
- Unusual audio service permission requests
- Privilege escalation attempts via audio service interfaces
Network Indicators:
- Not applicable - local vulnerability
SIEM Query:
Search for: 'audio service permission denied' OR 'privilege escalation attempt' in system logs