CVE-2025-31715: VoWiFi Service Privilege Escalation Flaw

CVE-2025-31715 Overview

CVE-2025-31715 is a critical command injection vulnerability in the VoWiFi (Voice over WiFi) service affecting Unisoc chipsets. The vulnerability exists due to improper input validation, allowing attackers to inject and execute arbitrary commands remotely. This could lead to remote escalation of privilege with no additional execution privileges needed, representing a severe security risk for devices utilizing affected Unisoc chipsets.

Critical Impact

This command injection vulnerability enables remote privilege escalation without requiring any authentication or user interaction, potentially allowing complete device compromise.

Affected Products

• Unisoc chipsets with VoWiFi service enabled
• Mobile devices utilizing vulnerable Unisoc system-on-chip components
• Telecommunications equipment with affected VoWiFi implementations

Discovery Timeline

• 2025-08-18 - CVE-2025-31715 published to NVD
• 2025-08-18 - Last updated in NVD database

Technical Details for CVE-2025-31715

Vulnerability Analysis

This vulnerability is classified as a command injection flaw stemming from improper input validation within the VoWiFi service component. The VoWiFi service processes network-supplied input without adequate sanitization, creating an injection point where malicious commands can be inserted and executed within the system context.

The attack can be conducted remotely over the network with low complexity. No privileges or user interaction are required to exploit this vulnerability, making it particularly dangerous. Successful exploitation results in complete compromise of confidentiality, integrity, and availability of the affected system.

Root Cause

The root cause of CVE-2025-31715 is improper input validation in the VoWiFi service component. When the service processes incoming data, it fails to properly sanitize or validate user-controlled input before passing it to system command execution functions. This allows specially crafted input containing shell metacharacters or command sequences to be interpreted and executed as system commands.

Attack Vector

The vulnerability is exploitable remotely over the network. An attacker can craft malicious input targeting the VoWiFi service that, when processed, executes arbitrary commands on the underlying system. The attack requires no authentication and no user interaction, allowing automated exploitation at scale.

The attack flow involves:

1. Attacker identifies a device with the vulnerable VoWiFi service exposed
2. Malicious input containing command injection payloads is sent to the service
3. The service fails to sanitize the input and passes it to command execution functions
4. Injected commands execute with the privileges of the VoWiFi service process
5. Attacker achieves privilege escalation and system compromise

For technical details on the vulnerability mechanism, refer to the Unisoc Security Announcement.

Detection Methods for CVE-2025-31715

Indicators of Compromise

• Unusual network traffic patterns targeting VoWiFi service ports
• Unexpected process spawning or command execution from VoWiFi service processes
• Anomalous system calls or shell invocations originating from telecommunications services
• Evidence of privilege escalation attempts in system logs

Detection Strategies

• Monitor network traffic for malformed or suspicious VoWiFi protocol messages containing shell metacharacters
• Implement application-level logging for the VoWiFi service to capture input validation failures
• Deploy endpoint detection rules to identify command injection patterns in process command lines
• Use behavioral analysis to detect anomalous process hierarchies stemming from VoWiFi components

Monitoring Recommendations

• Enable verbose logging on devices running VoWiFi services to capture potential exploitation attempts
• Configure network intrusion detection systems with signatures for command injection patterns
• Monitor for unexpected outbound connections from affected devices that may indicate post-exploitation activity
• Implement real-time alerting for privilege escalation events on vulnerable device populations

How to Mitigate CVE-2025-31715

Immediate Actions Required

• Review and apply security patches from Unisoc addressing this vulnerability
• Disable VoWiFi functionality on affected devices if not business-critical until patches are applied
• Implement network segmentation to limit exposure of vulnerable devices
• Monitor affected devices for signs of compromise while awaiting patches

Patch Information

Unisoc has released a security advisory addressing this vulnerability. Organizations should refer to the Unisoc Security Announcement for official patch information and firmware updates. Contact your device manufacturer or carrier for specific patch availability timelines for your devices.

Workarounds

• Disable VoWiFi functionality on affected devices through device settings if the feature is not required
• Implement network-level filtering to restrict access to VoWiFi service endpoints from untrusted networks
• Deploy application firewalls capable of inspecting and blocking command injection payloads
• Consider isolating affected devices on dedicated network segments with enhanced monitoring

# Example: Disable VoWiFi on Android devices via ADB (if available)
# Note: Actual commands may vary by device manufacturer
adb shell settings put global vowifi_enabled 0