CVE-2023-30729
📋 TL;DR
This vulnerability in Samsung Email allows attackers to perform man-in-the-middle attacks by exploiting improper certificate validation. Attackers can intercept and potentially modify network traffic containing sensitive information like emails and credentials. All users of Samsung Email versions prior to 6.1.82.0 are affected.
💻 Affected Systems
- Samsung Email
📦 What is this software?
Email by Samsung
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of email communications including interception of sensitive business data, credentials, and personal information leading to identity theft, corporate espionage, or account takeover.
Likely Case
Interception of email content and attachments in transit, potentially exposing confidential information and enabling social engineering attacks.
If Mitigated
Limited exposure if using additional encryption layers or network segmentation, but basic email functionality remains vulnerable to interception.
🎯 Exploit Status
Requires attacker to be positioned to intercept network traffic (e.g., on same network or controlling network infrastructure). No public exploit code known, but MITM techniques are well-established.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 6.1.82.0 and later
Vendor Advisory: https://security.samsungmobile.com/serviceWeb.smsb?year=2023&month=09
Restart Required: Yes
Instructions:
1. Open Google Play Store on Samsung device. 2. Search for 'Samsung Email'. 3. If update available, tap 'Update'. 4. Restart device after update completes. 5. Verify version is 6.1.82.0 or higher in app settings.
🔧 Temporary Workarounds
Use alternative email client
androidTemporarily switch to a different email application with proper certificate validation until Samsung Email is updated.
Disable Samsung Email
androidDisable or uninstall Samsung Email app to prevent vulnerable connections.
🧯 If You Can't Patch
- Use VPN with certificate pinning for all email communications
- Restrict device network access to trusted networks only
🔍 How to Verify
Check if Vulnerable:
Check Samsung Email app version in device settings > Apps > Samsung Email > App info. If version is below 6.1.82.0, device is vulnerable.Check Version:
No command line; check via Android Settings > Apps > Samsung Email > App infoVerify Fix Applied:
Confirm Samsung Email version is 6.1.82.0 or higher in app settings after update.📡 Detection & Monitoring
Log Indicators:
- Unusual certificate validation failures in email client logs
- Multiple SSL/TLS handshake failures from same device
Network Indicators:
- Unexpected SSL/TLS interception patterns
- MITM tools like mitmproxy detected in network traffic
SIEM Query:
source="android_devices" app="Samsung Email" (event="ssl_error" OR event="certificate_validation_failed")