CVE-2023-26497
📋 TL;DR
This vulnerability in Samsung baseband chipsets allows memory corruption when processing Session Description Negotiation for Video Configuration Attribute. Attackers could potentially execute arbitrary code on affected devices. This affects smartphones and automotive systems using the listed Exynos modem chipsets.
💻 Affected Systems
- Samsung Exynos Modem 5123
- Samsung Exynos Modem 5300
- Samsung Exynos 980
- Samsung Exynos 1080
- Samsung Exynos Auto T5125
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution allowing complete device compromise, including interception of communications, data theft, and persistent backdoor installation.
Likely Case
Device crash/reboot leading to denial of service, or limited code execution within baseband processor context.
If Mitigated
No impact if patched or if exploit attempts are blocked by network security controls.
🎯 Exploit Status
Exploitation requires specialized knowledge of baseband processors and cellular protocols.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Device-specific firmware updates from manufacturers
Vendor Advisory: https://semiconductor.samsung.com/support/quality-support/product-security-updates/
Restart Required: Yes
Instructions:
1. Check for device manufacturer security updates. 2. Apply latest firmware/OS updates. 3. For automotive systems, contact vehicle manufacturer for update procedures.
🔧 Temporary Workarounds
Disable vulnerable video features
allDisable video calling or video configuration features if not required
Network filtering
allImplement network-level filtering for suspicious Session Description Protocol traffic
🧯 If You Can't Patch
- Isolate affected devices from critical networks
- Implement strict network monitoring for anomalous baseband communications
🔍 How to Verify
Check if Vulnerable:
Check device specifications for affected Exynos modem chipsets and verify firmware version against manufacturer security bulletins.Check Version:
Android: Settings > About Phone > Baseband version; Automotive: Consult manufacturer documentationVerify Fix Applied:
Confirm device has received security updates after March 2023 and verify baseband firmware version.📡 Detection & Monitoring
Log Indicators:
- Baseband processor crashes
- Unexpected modem resets
- Video call session failures
Network Indicators:
- Malformed Session Description Protocol packets
- Anomalous video configuration negotiation attempts
SIEM Query:
Search for baseband/modem error events or unexpected session negotiation failures🔗 References
- https://semiconductor.samsung.com/processor/mobile-processor/
- https://semiconductor.samsung.com/processor/modem/
- https://semiconductor.samsung.com/support/quality-support/product-security-updates/
- https://semiconductor.samsung.com/processor/mobile-processor/
- https://semiconductor.samsung.com/processor/modem/
- https://semiconductor.samsung.com/support/quality-support/product-security-updates/
