CVE-2024-20870
📋 TL;DR
This vulnerability in Galaxy Store allows local attackers to write arbitrary files with Galaxy Store's privileges due to improper intent verification in a broadcast receiver. It affects Samsung Galaxy devices running vulnerable versions of Galaxy Store. Attackers must have local access to the device to exploit this.
💻 Affected Systems
- Samsung Galaxy Store
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
An attacker could write malicious files to sensitive locations, potentially leading to privilege escalation, data corruption, or installation of malware with Galaxy Store's permissions.
Likely Case
Local attackers could modify application data, inject malicious code into other apps, or disrupt normal Galaxy Store functionality.
If Mitigated
With proper access controls and updated software, the risk is limited to temporary disruption of Galaxy Store functions.
🎯 Exploit Status
Requires local access and knowledge of Android intent system. No public exploit code has been disclosed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 4.5.71.8 and later
Vendor Advisory: https://security.samsungmobile.com/serviceWeb.smsb?year=2024&month=05
Restart Required: No
Instructions:
1. Open Galaxy Store app. 2. Go to Settings. 3. Check for updates. 4. Install version 4.5.71.8 or later. 5. Alternatively, update through Samsung's app update system.
🔧 Temporary Workarounds
Disable Galaxy Store
androidTemporarily disable Galaxy Store to prevent exploitation
adb shell pm disable-user --user 0 com.sec.android.app.samsungapps
Restrict app permissions
androidReview and restrict Galaxy Store permissions in device settings
🧯 If You Can't Patch
- Implement strict device access controls and monitoring
- Use mobile device management (MDM) solutions to restrict app installations and monitor for suspicious activity
🔍 How to Verify
Check if Vulnerable:
Check Galaxy Store version in app settings or via: adb shell dumpsys package com.sec.android.app.samsungapps | grep versionNameCheck Version:
adb shell dumpsys package com.sec.android.app.samsungapps | grep versionNameVerify Fix Applied:
Confirm Galaxy Store version is 4.5.71.8 or higher using the same command📡 Detection & Monitoring
Log Indicators:
- Unusual file write operations by Galaxy Store
- Multiple broadcast intents to Galaxy Store from untrusted sources
Network Indicators:
- Not applicable - local vulnerability
SIEM Query:
Not applicable for typical SIEM systems as this is a local mobile device vulnerability