A security flaw has been discovered in Open5GS up to 2.7.6. Impacted is the function smf_gx_cca_cb of the component SMF Diameter Gx Credit-Control-Answer Handler. The manipulation results in denial of service.
The attack can be launched remotely. The exploit has been released to the public and may be used for attacks. Upgrading to version 2.7.7 is recommended to address this issue.
The patch is identified as f23d7a5e959acd8f37b925dc29b85f26b7d391cb. Upgrading the affected component is advised.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
Low
Partial disruption
CVSS Vector v4.0
Weakness Type (CWE)
Vulnerable Products
n/a:open5gs
References 10
https://vuldb.com/vuln/387283
VDB-387283 | Open5GS SMF Diameter Gx Credit-Control-Answer smf_gx_cca_cb denial of service
https://vuldb.com/vuln/387283/cti
VDB-387283 | CTI Indicators (IOB, IOC, TTP, IOA)
https://vuldb.com/cve/CVE-2025-15687
CVE-2025-15687 | CVE Analysis and Report
https://vuldb.com/submit/867119
Submit #867119 | Open5GS v2.7.5 Denial of Service
https://github.com/open5gs/open5gs/issues/4027
NVD
https://github.com/open5gs/open5gs/pull/4034
NVD
https://github.com/user-attachments/files/21515527/SMF.crashes.zip
NVD
https://github.com/open5gs/open5gs/commit/f23d7a5e959acd8f37b925dc29b85f26b7d39…
NVD
https://github.com/open5gs/open5gs/releases/tag/v2.7.7
NVD
https://github.com/open5gs/open5gs/
NVD