free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, the AMF in Free5GC does not verify the UE Security Capabilities received in NGAP PathSwitchRequest messages against its locally stored values, as mandated by 3GPP TS 33.501 §6.7.3.1. A malicious gNB can overwrite the AMF's stored UE security capabilities with arbitrary values, which are then propagated in PathSwitchRequest Acknowledge messages and subsequent Handover Request messages. This leads to persistent handov
free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, the AMF in Free5GC does not verify the UE Security Capabilities received in NGAP PathSwitchRequest messages against its locally stored values, as mandated by 3GPP TS 33.501 §6.7.3.1. A malicious gNB can overwrite the AMF's stored UE security capabilities with arbitrary values, which are then propagated in PathSwitchRequest Acknowledge messages and subsequent Handover Request messages. This leads to persistent handover denial-of-service for affected UEs. This vulnerability is fixed in 4.2.2.
为什么是这个 VPI(可解释·实验性)
VPI 计算依据
| 影响度 | 61.00 |
| 利用信号(无额外利用信号) | ×1.00 |
| VPI | 61.00 |
VPI 公式 vpi-v1
| 来源 | CVSS 版本 | 基础评分 | 严重程度 | 向量字符串 | 评估日期 |
|---|---|---|---|---|---|
| NVDNIST | 3.1 | 6.1 | MEDIUM | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:L | 2026. 05. 27. |
| OSV3rd | 3.1 | 6.1 |
| CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:L |
| 2026. 05. 13. |