CVE-2017-3758 – This vulnerability allows attackers to bypass a... (How to Fix)

Q: What is the severity of CVE-2017-3758?

CVE-2017-3758 has a CVSS score of 9.8 (CRITICAL). This vulnerability allows attackers to bypass access controls in Lenovo Service Framework components on Android devices, enabling remote code execution. Affected users include anyone with Lenovo Android devices running vulnerable versions of the Lenovo Service Framework application.

📋 TL;DR

This vulnerability allows attackers to bypass access controls in Lenovo Service Framework components on Android devices, enabling remote code execution. Affected users include anyone with Lenovo Android devices running vulnerable versions of the Lenovo Service Framework application.

💻 Affected Systems

Products:

Lenovo Android devices with Lenovo Service Framework

Versions: Lenovo Service Framework versions prior to 4.1.5.1.180124.1115

Operating Systems: Android

Default Config Vulnerable: ⚠️ Yes

Notes: Affects Lenovo-branded Android devices including smartphones and tablets

📦 What is this software?

Service Framework by Lenovo

View all CVEs affecting Service Framework →

⚠️ Risk & Real-World Impact

🔴

Worst Case

Complete device compromise allowing installation of malware, data theft, and persistent backdoor access

🟠

Likely Case

Unauthorized app installation, data exfiltration, and device control by attackers

🟢

If Mitigated

No impact if patched or workarounds implemented

🌐 Internet-Facing: HIGH - Can be exploited remotely without user interaction

🏢 Internal Only: LOW - Primarily affects mobile devices, not internal enterprise systems

🎯 Exploit Status

Public PoC: ✅ No

Weaponized: UNKNOWN

Unauthenticated Exploit: ⚠️ Yes

Complexity: LOW

CVSS 9.8 indicates critical severity with low attack complexity and no authentication required

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: Lenovo Service Framework 4.1.5.1.180124.1115 or later

Vendor Advisory: https://support.lenovo.com/us/en/product_security/LEN-15374

Restart Required: Yes

Instructions:

1. Open Google Play Store on affected device 2. Search for Lenovo Service Framework 3. Update to latest version 4. Restart device

🔧 Temporary Workarounds

Disable Lenovo Service Framework

android

Temporarily disable the vulnerable application

adb shell pm disable-user --user 0 com.lenovo.lsf

Remove app permissions

android

Revoke all permissions from Lenovo Service Framework

adb shell pm revoke com.lenovo.lsf android.permission.INTERNET
adb shell pm revoke com.lenovo.lsf android.permission.ACCESS_NETWORK_STATE

🧯 If You Can't Patch

Isolate affected devices from untrusted networks
Implement mobile device management (MDM) controls to restrict app installations

🔍 How to Verify

Check if Vulnerable:

Check Lenovo Service Framework version in device settings > Apps > Lenovo Service Framework

Check Version:

adb shell dumpsys package com.lenovo.lsf | grep versionName

Verify Fix Applied:

Verify version is 4.1.5.1.180124.1115 or higher

📡 Detection & Monitoring

Log Indicators:

Unauthorized package installations
Suspicious process execution from Lenovo Service Framework

Network Indicators:

Unexpected network connections from Lenovo Service Framework app

SIEM Query:

source="android_logs" app="com.lenovo.lsf" (action="install" OR action="execute")

📊 Metadata

CVE ID: CVE-2017-3758

CVSS v3 Score: 9.8 (CRITICAL)

CVSS Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Published: October 17, 2017

Last Updated: April 20, 2025

🔗 References

https://support.lenovo.com/us/en/product_security/LEN-15374 Patch,Vendor Advisory
https://support.lenovo.com/us/en/product_security/LEN-15374 Patch,Vendor Advisory

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