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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.

Dabei geht es um die Funktion ngap_build_downlink_nas_transport der Komponente AMF. Durch die Manipulation mit unbekannten Daten kann eine reachable assertion-Schwachstelle ausgenutzt werden. Die Umsetzung des Angriffs kann dabei über das Netzwerk erfolgen. Der Exploit steht zur öffentlichen Verfügung. Ein Aktualisieren auf die Version 2.7.6 vermag dieses Problem zu lösen. Der Patch wird als bca0a7b6e01d254f4223b83831162566d4626428 bezeichnet. Als bestmögliche Massnahme wird das Einspielen eines Upgrades empfohlen.

PUBLISHED Reserved 2025-08-09 | Published 2025-08-10 | Updated 2025-08-15 | Assigner VulDB




MEDIUM: 6.9CVSS: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
MEDIUM: 5.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C
MEDIUM: 5.3CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C
5.0AV:N/AC:L/Au:N/C:N/I:N/A:P/E:POC/RL:OF/RC:C

Problem types

Reachable Assertion

Timeline

2025-08-09:Advisory disclosed
2025-08-09:VulDB entry created
2025-08-15:VulDB entry last update

Credits

lixxxiang (VulDB User) reporter

lixxxiang (VulDB User) analyst

References

vuldb.com/?id.319333 (VDB-319333 | Open5GS AMF ngap_build_downlink_nas_transport assertion) vdb-entry technical-description

vuldb.com/?ctiid.319333 (VDB-319333 | CTI Indicators (IOB, IOC, IOA)) signature permissions-required

vuldb.com/?submit.626124 (Submit #626124 | Open5GS <=v2.7.5 Denail of Service) third-party-advisory

vuldb.com/?submit.625698 (Submit #625698 | Open5GS <= v2.7.5 Denial of Service (Duplicate)) third-party-advisory

github.com/open5gs/open5gs/issues/3950 issue-tracking

github.com/open5gs/open5gs/issues/3950 issue-tracking

github.com/...ttachments/files/21030801/newdata_for_ngap.zip exploit

github.com/...ommit/bca0a7b6e01d254f4223b83831162566d4626428 patch

github.com/open5gs/open5gs/releases/tag/v2.7.6 patch

github.com/ZHENGHAOHELLO/BugReport/blob/main/CVE-2025-8804 related

cve.org (CVE-2025-8804)

nvd.nist.gov (CVE-2025-8804)

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