[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fBSAIcpyHjA0d6NAnpVXTNjHSOooK6yG3OIPgtVN2cIo":3},{"lesson":4},{"id":5,"slug":6,"article_id":7,"title":8,"body":9,"prevention":10,"framework_refs":11,"status":22,"created_at":23,"published_at":24,"article":25,"tags":29,"podcasts":48},"83454a2f-d4bc-4ae8-92d1-86e8746b2b8c","84-vulnerabilities-found-in-4g5g-core-networks-including-session-hijacking","4dd73a30-288b-45ea-b3be-5d4ae4910c69","84 Vulnerabilities Found in 4G\u002F5G Core Networks, Including Session Hijacking","Researchers at Nanyang Technological University discovered 84 vulnerabilities in 4G and 5G core network implementations, rooted in implicit trust assumptions between internal network functions — meaning components blindly trust messages from other components without sufficient validation. This architectural flaw enables attackers to hijack sessions, launch denial-of-service attacks, and potentially disrupt critical telecommunications infrastructure at scale. The fact that these vulnerabilities span multiple open-source implementations and persist across network generations underscores how foundational design flaws can outlive technology upgrades. Telecom operators and vendors cannot assume that migrating to newer standards (e.g., 5G) automatically eliminates inherited security weaknesses.","**Immediate actions:**\n- Audit all deployed 4G\u002F5G core network functions for implicit trust relationships and apply vendor-provided patches or mitigations immediately.\n- Run LLM-assisted or automated fuzzing tools against core network interfaces (e.g., SBI\u002FHTTP\u002F2 in 5G) to surface logic and trust-validation flaws before attackers do.\n\n**Long-term improvements:**\n- Adopt a Zero Trust architecture for internal network function communications, requiring mutual authentication and authorization even between trusted internal components.\n- Establish a formal vulnerability management program specific to telecom infrastructure, including regular third-party security assessments of open-source 5G core implementations (e.g., Open5GS, free5GC).\n- Integrate security requirements for implicit trust validation into procurement and vendor risk management processes for all network function vendors.\n\n**Detection measures:**\n- Deploy deep-packet inspection and anomaly detection on core network interfaces to identify unexpected session manipulation or abnormal inter-function messaging patterns.\n- Implement centralized logging and monitoring of all Service-Based Interface (SBI) traffic to detect denial-of-service patterns or session hijacking attempts in real time.",[12,13,14,15,16,17,18,19,20,21],"NIST SP 800-187 (Guide to LTE Security)","NIST Zero Trust Architecture SP 800-207","NIST CSF ID.RA-1 (Asset Vulnerability Identification)","CIS Control 7: Continuous Vulnerability Management","CIS Control 3: Data Protection","CIS Control 13: Network Monitoring and Defense","3GPP TS 33.501 (Security Architecture for 5G)","ENISA Threat Landscape for 5G Networks","NIST AC-4 (Information Flow Enforcement)","NIST SI-10 (Information Input Validation)","published","2026-07-31T16:22:21.280158+00:00","2026-07-31T16:22:21.178+00:00",{"id":7,"url":26,"slug":27,"title":28},"https:\u002F\u002Fthehackernews.com\u002F2026\u002F07\u002Fresearchers-report-84-flaws-in-4g-and.html","researchers-report-84-flaws-in-4g-and-5g-cores-including-a-session-hijacking-fla-8be231","Researchers Report 84 Flaws in 4G and 5G Cores, Including a Session Hijacking Flaw",[30,36,42],{"id":31,"name":32,"slug":33,"description":34,"color":35},"05757c8d-6b93-4194-b35d-7359e7d33b0e","Vulnerability Management","vulnerability-management","Missing scans, no risk prioritization","#fb923c",{"id":37,"name":38,"slug":39,"description":40,"color":41},"1ec88fde-2d0f-4ed8-932a-33f5ccc0fdc7","Access Control","access-control","Excessive privileges, missing MFA, weak auth","#f97316",{"id":43,"name":44,"slug":45,"description":46,"color":47},"f43a7f30-5046-4b10-9dba-1a704139821e","Network Segmentation","network-segmentation","Lateral movement, flat networks, missing firewalls","#06b6d4",[]]