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free5gc

free5gc v4.1.0 and before is vulnerable to Buffer Overflow. When AMF receives an UplinkRANConfigurationTransfer NGAP message from a gNB, the AMF process crashes.

CVE-2025-63679 is a buffer overflow vulnerability identified in free5gc, an open-source 5G core network implementation, specifically affecting version 4.1.0 and earlier. The vulnerability arises when the AMF component receives a specially crafted UplinkRANConfigurationTransfer message via the NG Application Protocol (NGAP) from a gNB (next-generation NodeB). Due to improper bounds checking or insufficient validation of the message payload, the AMF process crashes, leading to a denial of service. Given the critical CVSS score of 9.8 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H), the vulnerability can be exploited remotely over the network without any authentication or user interaction, resulting in complete compromise of confidentiality, integrity, and availability of the AMF service. The AMF is a pivotal element in the 5G core, responsible for mobility management and session handling, so its disruption can severely impact network operations. Although no public exploits are currently known, the nature of the vulnerability (CWE-120: classic buffer overflow) suggests potential for remote code execution if exploited skillfully. The lack of available patches at the time of disclosure increases urgency for operators to implement interim mitigations. This vulnerability highlights risks inherent in open-source 5G core deployments, which are increasingly adopted for flexibility and cost reasons but require rigorous security validation. Organizations must scrutinize NGAP message handling and consider network segmentation and anomaly detection to mitigate exploitation risks until patches are released.

Detailed information about CVE-2025-63679: n/a. Get real-time updates, technical details, and mitigation strategies.

CVE-2025-63679: n/a - Live Threat Intelligence - Threat Radar | OffSeq.com

CVE-2025-63679: n/a

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