CVE-2025-8804

Open5GS AMF ngap_build_downlink_nas_transport assertion

State: Published
Severity: 6.9 Medium
Published: Aug 10, 2025
Updated: Aug 15, 2025
Reserved: Aug 9, 2025

Description

A vulnerability was found in Open5GS up to 2.7.5. Affected by this vulnerability is the function ngap_build_downlink_nas_transport of the component AMF. The manipulation leads to reachable assertion. The attack can be launched remotely. The exploit has been disclosed to the public and may be used. Upgrading to version 2.7.6 is able to address this issue. The identifier of the patch is bca0a7b6e01d254f4223b83831162566d4626428. It is recommended to upgrade the affected component.

Scores

CVSS	Score	Vector	Source
4.0	6.9 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P	VulDB
3.1	5.3 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C	VulDB
3.0	5.3 Medium	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C	VulDB
2.0	5.0 Medium	AV:N/AC:L/Au:N/C:N/I:N/A:P/E:POC/RL:OF/RC:C	VulDB

Weaknesses

CWE-617 Reachable Assertion

Affected Products

Product	Versions
Open5GSn/a	2.7.0Affected 2.7.1Affected 2.7.2Affected 2.7.3Affected 2.7.4Affected 2.7.5Affected 2.7.6Not affected

References

VDB-319333 | Open5GS AMF ngap_build_downlink_nas_transport assertionvdb-entrytechnical-description
VDB-319333 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
Submit #626124 | Open5GS <=v2.7.5 Denail of Servicethird-party-advisory
Submit #625698 | Open5GS <= v2.7.5 Denial of Service (Duplicate)third-party-advisory
https://github.com/open5gs/open5gs/issues/3950issue-tracking
https://github.com/open5gs/open5gs/issues/3950#issuecomment-3034693457issue-tracking
https://github.com/user-attachments/files/21030801/newdata_for_ngap.zipexploit
https://github.com/open5gs/open5gs/commit/bca0a7b6e01d254f4223b83831162566d4626428patch
https://github.com/open5gs/open5gs/releases/tag/v2.7.6patch
https://github.com/ZHENGHAOHELLO/BugReport/blob/main/CVE-2025-8804related

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