CVE-2024-28067
📋 TL;DR
This vulnerability in Samsung Exynos Modem 5300 allows a Man-in-the-Middle attacker to downgrade the security mode of packets, enabling the attacker to send plaintext messages to the victim. This affects devices using the vulnerable modem chipset, primarily Samsung mobile devices and potentially other manufacturers' devices incorporating this modem.
💻 Affected Systems
- Samsung Exynos Modem 5300
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could intercept and manipulate sensitive communications, potentially leading to data theft, credential compromise, or injection of malicious content into device communications.
Likely Case
Selective plaintext message injection or downgrade attacks in controlled MITM scenarios, potentially compromising specific application data.
If Mitigated
Limited impact if strong application-layer encryption is used and network-level protections prevent MITM positioning.
🎯 Exploit Status
Requires MITM positioning and knowledge of the vulnerability; no public exploit code identified.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified in references; check Samsung security updates
Vendor Advisory: https://semiconductor.samsung.com/support/quality-support/product-security-updates/cve-2024-28067/
Restart Required: Yes
Instructions:
1. Check for Samsung security updates
2. Apply available modem firmware updates
3. Reboot device after update
🔧 Temporary Workarounds
Use application-layer encryption
allImplement end-to-end encryption in applications to protect data even if modem security is compromised
Avoid untrusted networks
allPrevent MITM attacks by using trusted, secure networks only
🧯 If You Can't Patch
- Isolate affected devices from untrusted networks
- Monitor for unusual network traffic patterns
🔍 How to Verify
Check if Vulnerable:
Check device specifications for Exynos Modem 5300 and review Samsung security update statusCheck Version:
Device-specific; typically in Settings > About Phone > Software InformationVerify Fix Applied:
Verify latest Samsung security updates are installed and check modem firmware version if accessible📡 Detection & Monitoring
Log Indicators:
- Unexpected protocol downgrades in modem logs
- Unusual plaintext communication patterns
Network Indicators:
- MITM activity detection
- Protocol anomalies in cellular communications
SIEM Query:
Not applicable for typical SIEM deployment; requires modem-level monitoring🔗 References
- https://semiconductor.samsung.com/support/quality-support/product-security-updates/
- https://semiconductor.samsung.com/support/quality-support/product-security-updates/cve-2024-28067/
- https://semiconductor.samsung.com/support/quality-support/product-security-updates/
- https://semiconductor.samsung.com/support/quality-support/product-security-updates/cve-2024-28067/
