CVE-2024-34659
📋 TL;DR
This vulnerability in GroupSharing allows remote attackers to force victims to join groups without their consent, potentially exposing sensitive information shared within those groups. It affects GroupSharing versions prior to 13.6.13.3. The attack can be executed remotely without user interaction.
💻 Affected Systems
- Samsung GroupSharing
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could force victims into malicious groups containing sensitive or compromising information, leading to data exposure, social engineering attacks, or reputational damage.
Likely Case
Attackers force users into groups to expose them to unwanted content, spam, or phishing attempts through group communications.
If Mitigated
With proper access controls and monitoring, impact is limited to temporary group membership that can be quickly detected and reversed.
🎯 Exploit Status
The vulnerability description suggests remote attackers can force victims to join groups, indicating relatively straightforward exploitation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 13.6.13.3
Vendor Advisory: https://security.samsungmobile.com/serviceWeb.smsb?year=2024&month=09
Restart Required: Yes
Instructions:
1. Open Samsung Galaxy Store 2. Search for GroupSharing 3. Update to version 13.6.13.3 or later 4. Restart device after update
🔧 Temporary Workarounds
Disable GroupSharing
androidTemporarily disable GroupSharing functionality to prevent exploitation
Settings > Apps > GroupSharing > Disable
Network Restriction
androidRestrict network access for GroupSharing app
Settings > Apps > GroupSharing > Mobile data > Disable background data
Settings > Apps > GroupSharing > Wi-Fi > Disable background data
🧯 If You Can't Patch
- Monitor group membership changes and audit logs for unauthorized group joins
- Implement network segmentation to restrict GroupSharing traffic to trusted networks only
🔍 How to Verify
Check if Vulnerable:
Check GroupSharing version in device settings: Settings > Apps > GroupSharing > App infoCheck Version:
adb shell dumpsys package com.samsung.android.groupsharing | grep versionNameVerify Fix Applied:
Verify GroupSharing version is 13.6.13.3 or higher after update📡 Detection & Monitoring
Log Indicators:
- Unexpected group join events
- Group membership changes without user action
- Failed authentication attempts for group operations
Network Indicators:
- Unusual GroupSharing API calls from unexpected sources
- Spike in group join requests
SIEM Query:
source="GroupSharing" AND (event="group_join" OR event="membership_change") AND user_action="false"