Webinar: Security Analysis of Critical 5G Interface | 5G Security | Telecom Security | TelcoLearn

Why It Matters

Weak or mis‑configured 5G interface security creates exploitable gaps that can compromise user data, network integrity, and the broader rollout of next‑generation mobile services.

Key Takeaways

• Operators often skip optional 5G security features to reduce cost
• Misconfigurations during test-to-production transitions can disable integrity protection
• Interface mismatches in TLS/IPSec enable downgrade attacks on GNB communications
• STRIDE model highlights spoofing, tampering, and privilege escalation risks in 5G
• Securing N1, N3, N4, XN interfaces is critical for confidentiality and integrity

Summary

The webinar, hosted by Telan’s Sanjay Kumar and delivered by telecom researcher Arpit, examined why 5G interface security must move from an optional add‑on to a built‑in requirement. It traced the evolution of 5G’s service‑based architecture, highlighted the critical N1, N2, N3, N4, N6, N9 and XN interfaces, and explained how new deployment models such as network slicing and API‑driven services expand the attack surface.

Key insights included operators’ tendency to omit optional security controls to accelerate roll‑outs, and the resulting exposure to threats like spoofing, tampering, replay attacks, and privilege escalation. The presenter mapped these threats to the STRIDE framework and detailed how mandatory confidentiality, integrity, authentication, replay protection, and privacy goals are defined in 3GPP specifications. Specific vulnerabilities were illustrated, such as default‑zero integrity keys (NIA0/NEA0) left enabled after emergency or test deployments, and mismatched TLS/IPSec versions that permit downgrade attacks between gNodeBs.

Concrete examples underscored the risks: a mis‑configured N1 interface can expose registration messages to tampering; an XN link with weak IKEv2 can enable a rogue base‑station scenario, allowing packet sniffing with tools like Wireshark and potential injection of false user‑plane traffic. Similar downgrade pathways were shown for the NG‑AP protocol on the GNB‑AMF link, where inconsistent security levels lead to reduced encryption and possible eavesdropping.

The implications are clear for operators and vendors: enforce mandatory security features across all interfaces, implement rigorous configuration‑management processes when transitioning from test to production, and adopt continuous monitoring to detect mismatched security parameters. Failure to do so jeopardizes the confidentiality and integrity of 5G services and could delay the rollout of future 6G networks.

Original Description

5G networks introduce cloud-native architecture, service-based interfaces, APIs, and large-scale connectivity, which significantly expand the security attack surface.

In this recorded webinar, we explore how security professionals and telecom engineers can analyze and secure critical interfaces in modern 5G networks using structured threat modeling techniques.

🔐 Key Topics Covered

• Applying the STRIDE Threat Model to 5G networks

• Understanding 10 Critical 5G Interfaces and their attack surface

• The 4 Key Security Design Objectives in 5G architecture

• The 5 Core Security Goals for telecom networks

• Practical insights with live demonstrations

👨‍🏫 Instructor: Arpit Tripathi

This session is highly relevant for professionals working in:

• 5G Core Networks

• Radio Access Networks (RAN)

• TelcoCloud & Cloud Native Networks

• OSS/BSS Platforms

• Network Security & Cybersecurity

• Telecom Architecture & Design

The webinar focuses on proactive security design thinking in 5G networks, helping engineers understand how to identify vulnerabilities and secure critical telecom interfaces.

📢 If you are working in 5G, Telecom Security, TelcoCloud, or Network Architecture, this session will provide valuable technical insights.

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