CVE-2024-20885
📋 TL;DR
This vulnerability in Samsung Dialer allows local attackers to bypass permission checks and make phone calls without proper authorization. It affects Samsung devices running vulnerable versions of the Dialer app prior to the May 2024 security update. Attackers need physical access or local app execution on the device.
💻 Affected Systems
- Samsung Dialer app
📦 What is this software?
Android by Samsung
Android is Google's open-source mobile operating system powering over 3 billion devices worldwide, including smartphones, tablets, smart TVs, automotive systems, wearables, and IoT devices. As the world's dominant mobile OS with approximately 72% global market share, Android serves as the foundation...
Learn more about Android →Android by Samsung
Android is Google's open-source mobile operating system powering over 3 billion devices worldwide, including smartphones, tablets, smart TVs, automotive systems, wearables, and IoT devices. As the world's dominant mobile OS with approximately 72% global market share, Android serves as the foundation...
Learn more about Android →Android by Samsung
Android is Google's open-source mobile operating system powering over 3 billion devices worldwide, including smartphones, tablets, smart TVs, automotive systems, wearables, and IoT devices. As the world's dominant mobile OS with approximately 72% global market share, Android serves as the foundation...
Learn more about Android →Android by Samsung
Android is Google's open-source mobile operating system powering over 3 billion devices worldwide, including smartphones, tablets, smart TVs, automotive systems, wearables, and IoT devices. As the world's dominant mobile OS with approximately 72% global market share, Android serves as the foundation...
Learn more about Android →Android by Samsung
Android is Google's open-source mobile operating system powering over 3 billion devices worldwide, including smartphones, tablets, smart TVs, automotive systems, wearables, and IoT devices. As the world's dominant mobile OS with approximately 72% global market share, Android serves as the foundation...
Learn more about Android →Android by Samsung
Android is Google's open-source mobile operating system powering over 3 billion devices worldwide, including smartphones, tablets, smart TVs, automotive systems, wearables, and IoT devices. As the world's dominant mobile OS with approximately 72% global market share, Android serves as the foundation...
Learn more about Android →Android by Samsung
Android is Google's open-source mobile operating system powering over 3 billion devices worldwide, including smartphones, tablets, smart TVs, automotive systems, wearables, and IoT devices. As the world's dominant mobile OS with approximately 72% global market share, Android serves as the foundation...
Learn more about Android →Android by Samsung
Android is Google's open-source mobile operating system powering over 3 billion devices worldwide, including smartphones, tablets, smart TVs, automotive systems, wearables, and IoT devices. As the world's dominant mobile OS with approximately 72% global market share, Android serves as the foundation...
Learn more about Android →Android by Samsung
Android is Google's open-source mobile operating system powering over 3 billion devices worldwide, including smartphones, tablets, smart TVs, automotive systems, wearables, and IoT devices. As the world's dominant mobile OS with approximately 72% global market share, Android serves as the foundation...
Learn more about Android →Android by Samsung
Android is Google's open-source mobile operating system powering over 3 billion devices worldwide, including smartphones, tablets, smart TVs, automotive systems, wearables, and IoT devices. As the world's dominant mobile OS with approximately 72% global market share, Android serves as the foundation...
Learn more about Android →Android by Samsung
Android is Google's open-source mobile operating system powering over 3 billion devices worldwide, including smartphones, tablets, smart TVs, automotive systems, wearables, and IoT devices. As the world's dominant mobile OS with approximately 72% global market share, Android serves as the foundation...
Learn more about Android →Android by Samsung
Android is Google's open-source mobile operating system powering over 3 billion devices worldwide, including smartphones, tablets, smart TVs, automotive systems, wearables, and IoT devices. As the world's dominant mobile OS with approximately 72% global market share, Android serves as the foundation...
Learn more about Android →Android by Samsung
Android is Google's open-source mobile operating system powering over 3 billion devices worldwide, including smartphones, tablets, smart TVs, automotive systems, wearables, and IoT devices. As the world's dominant mobile OS with approximately 72% global market share, Android serves as the foundation...
Learn more about Android →Android by Samsung
Android is Google's open-source mobile operating system powering over 3 billion devices worldwide, including smartphones, tablets, smart TVs, automotive systems, wearables, and IoT devices. As the world's dominant mobile OS with approximately 72% global market share, Android serves as the foundation...
Learn more about Android →Android by Samsung
Android is Google's open-source mobile operating system powering over 3 billion devices worldwide, including smartphones, tablets, smart TVs, automotive systems, wearables, and IoT devices. As the world's dominant mobile OS with approximately 72% global market share, Android serves as the foundation...
Learn more about Android →Android by Samsung
Android is Google's open-source mobile operating system powering over 3 billion devices worldwide, including smartphones, tablets, smart TVs, automotive systems, wearables, and IoT devices. As the world's dominant mobile OS with approximately 72% global market share, Android serves as the foundation...
Learn more about Android →Android by Samsung
Android is Google's open-source mobile operating system powering over 3 billion devices worldwide, including smartphones, tablets, smart TVs, automotive systems, wearables, and IoT devices. As the world's dominant mobile OS with approximately 72% global market share, Android serves as the foundation...
Learn more about Android →Android by Samsung
Android is Google's open-source mobile operating system powering over 3 billion devices worldwide, including smartphones, tablets, smart TVs, automotive systems, wearables, and IoT devices. As the world's dominant mobile OS with approximately 72% global market share, Android serves as the foundation...
Learn more about Android →Android by Samsung
Android is Google's open-source mobile operating system powering over 3 billion devices worldwide, including smartphones, tablets, smart TVs, automotive systems, wearables, and IoT devices. As the world's dominant mobile OS with approximately 72% global market share, Android serves as the foundation...
Learn more about Android →Android by Samsung
Android is Google's open-source mobile operating system powering over 3 billion devices worldwide, including smartphones, tablets, smart TVs, automotive systems, wearables, and IoT devices. As the world's dominant mobile OS with approximately 72% global market share, Android serves as the foundation...
Learn more about Android →Android by Samsung
Android is Google's open-source mobile operating system powering over 3 billion devices worldwide, including smartphones, tablets, smart TVs, automotive systems, wearables, and IoT devices. As the world's dominant mobile OS with approximately 72% global market share, Android serves as the foundation...
Learn more about Android →Android by Samsung
Android is Google's open-source mobile operating system powering over 3 billion devices worldwide, including smartphones, tablets, smart TVs, automotive systems, wearables, and IoT devices. As the world's dominant mobile OS with approximately 72% global market share, Android serves as the foundation...
Learn more about Android →Android by Samsung
Android is Google's open-source mobile operating system powering over 3 billion devices worldwide, including smartphones, tablets, smart TVs, automotive systems, wearables, and IoT devices. As the world's dominant mobile OS with approximately 72% global market share, Android serves as the foundation...
Learn more about Android →Android by Samsung
Android is Google's open-source mobile operating system powering over 3 billion devices worldwide, including smartphones, tablets, smart TVs, automotive systems, wearables, and IoT devices. As the world's dominant mobile OS with approximately 72% global market share, Android serves as the foundation...
Learn more about Android →Android by Samsung
Android is Google's open-source mobile operating system powering over 3 billion devices worldwide, including smartphones, tablets, smart TVs, automotive systems, wearables, and IoT devices. As the world's dominant mobile OS with approximately 72% global market share, Android serves as the foundation...
Learn more about Android →Android by Samsung
Android is Google's open-source mobile operating system powering over 3 billion devices worldwide, including smartphones, tablets, smart TVs, automotive systems, wearables, and IoT devices. As the world's dominant mobile OS with approximately 72% global market share, Android serves as the foundation...
Learn more about Android →Android by Samsung
Android is Google's open-source mobile operating system powering over 3 billion devices worldwide, including smartphones, tablets, smart TVs, automotive systems, wearables, and IoT devices. As the world's dominant mobile OS with approximately 72% global market share, Android serves as the foundation...
Learn more about Android →Android by Samsung
Android is Google's open-source mobile operating system powering over 3 billion devices worldwide, including smartphones, tablets, smart TVs, automotive systems, wearables, and IoT devices. As the world's dominant mobile OS with approximately 72% global market share, Android serves as the foundation...
Learn more about Android →Android by Samsung
Android is Google's open-source mobile operating system powering over 3 billion devices worldwide, including smartphones, tablets, smart TVs, automotive systems, wearables, and IoT devices. As the world's dominant mobile OS with approximately 72% global market share, Android serves as the foundation...
Learn more about Android →Android by Samsung
Android is Google's open-source mobile operating system powering over 3 billion devices worldwide, including smartphones, tablets, smart TVs, automotive systems, wearables, and IoT devices. As the world's dominant mobile OS with approximately 72% global market share, Android serves as the foundation...
Learn more about Android →Android by Samsung
Android is Google's open-source mobile operating system powering over 3 billion devices worldwide, including smartphones, tablets, smart TVs, automotive systems, wearables, and IoT devices. As the world's dominant mobile OS with approximately 72% global market share, Android serves as the foundation...
Learn more about Android →Android by Samsung
Android is Google's open-source mobile operating system powering over 3 billion devices worldwide, including smartphones, tablets, smart TVs, automotive systems, wearables, and IoT devices. As the world's dominant mobile OS with approximately 72% global market share, Android serves as the foundation...
Learn more about Android →⚠️ Risk & Real-World Impact
Worst Case
An attacker with physical access could make unauthorized premium-rate or international calls, incurring financial costs for the victim, or make calls to emergency services causing false alarms.
Likely Case
Malicious apps installed on the device could make calls without user consent, potentially to premium numbers or for harassment purposes.
If Mitigated
With proper app permissions and user awareness, impact is limited to apps that have already been granted suspicious permissions.
🎯 Exploit Status
Local access required; likely involves calling specific Dialer components with malformed intents or permission bypass techniques.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: SMR May-2024 Release 1 or later
Vendor Advisory: https://security.samsungmobile.com/securityUpdate.smsb?year=2024&month=06
Restart Required: Yes
Instructions:
1. Go to Settings > Software update on Samsung device. 2. Download and install May 2024 security update. 3. Restart device after installation completes.
🔧 Temporary Workarounds
Restrict app permissions
allReview and restrict phone call permissions for all apps, especially unknown or untrusted ones.
Disable unknown sources
allPrevent installation of apps from unknown sources to reduce attack surface.
🧯 If You Can't Patch
- Monitor phone call logs for unauthorized calls, especially to premium numbers.
- Use mobile device management (MDM) to restrict app installations and monitor for suspicious behavior.
🔍 How to Verify
Check if Vulnerable:
Check Dialer app version in Settings > Apps > Dialer > App info, and compare with May 2024 security patch level in Settings > About phone > Software information.Check Version:
No command-line command; check via device Settings as described above.Verify Fix Applied:
Verify security patch level shows 'May 1, 2024' or later in Settings > About phone > Software information.📡 Detection & Monitoring
Log Indicators:
- Unexpected phone call logs from apps without call permissions
- Calls made without user interaction in device logs
Network Indicators:
- Unexpected outbound calls to premium/international numbers
SIEM Query:
Not applicable for typical SIEM; monitor via mobile device management (MDM) logs for unauthorized call attempts.