CVE-2022-48388
📋 TL;DR
CVE-2022-48388 is a missing permission check vulnerability in the powerEx service that allows local attackers to escalate privileges without requiring additional execution privileges. This affects systems running vulnerable versions of Unisoc software. The vulnerability enables attackers to gain elevated access on compromised devices.
💻 Affected Systems
- Unisoc powerEx service
📦 What is this software?
Android by Google
Android by Google
Android by Google
Android by Google
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with root/admin access, allowing installation of persistent malware, data theft, and lateral movement within the network.
Likely Case
Local privilege escalation leading to unauthorized access to sensitive system resources and potential installation of malicious software.
If Mitigated
Limited impact with proper access controls and privilege separation in place, though local users could still gain unauthorized elevated privileges.
🎯 Exploit Status
Exploitation requires local access to the device. The missing permission check suggests straightforward exploitation once local access is obtained.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified in references, but Unisoc has released security updates
Vendor Advisory: https://www.unisoc.com/en_us/secy/announcementDetail/1654776866982133761
Restart Required: Yes
Instructions:
1. Contact device manufacturer for security updates. 2. Apply Unisoc-provided patches for affected chipsets. 3. Update device firmware to latest secure version. 4. Reboot device after patch installation.
🔧 Temporary Workarounds
Restrict local access
allLimit physical and remote local access to vulnerable devices
Disable unnecessary services
linuxDisable powerEx service if not required for device functionality
pm disable com.unisoc.powerex
setprop ctl.stop powerex
🧯 If You Can't Patch
- Implement strict access controls to limit who has local access to devices
- Monitor for privilege escalation attempts and unusual process behavior
🔍 How to Verify
Check if Vulnerable:
Check device chipset manufacturer and firmware version. Devices using Unisoc chipsets with outdated firmware are likely vulnerable.Check Version:
getprop ro.build.version.security_patchVerify Fix Applied:
Verify firmware version is updated to latest secure version from manufacturer. Check that security patch level includes fixes for CVE-2022-48388.📡 Detection & Monitoring
Log Indicators:
- Unexpected privilege escalation attempts
- Unauthorized access to powerEx service
- Processes running with unexpected elevated privileges
Network Indicators:
- Not applicable - local vulnerability
SIEM Query:
process where (parent_process_name contains 'powerex' OR process_name contains 'powerex') AND integrity_level changed