free5GC User Data Repository (UDR) Leaks Error Details

Summary

The free5GC User Data Repository (UDR) in versions up to 1.4.1 may leak sensitive error details to remote clients, potentially helping attackers to identify network services. This affects all free5GC deployments using the Nnef_PfdManagement service. To fix this issue, apply the patch from free5gc/udr pull request 56.

What to do

No fix is available yet. Check with your software vendor for updates.

Affected software

Vendor	Product	Affected versions	Fix available
free5gc	udr	<= 1.4.1	–

Original title

free5GC UDR is the user data repository (UDR) for free5GC, an an open-source project for 5th generation (5G) mobile core networks. In versions up to and including 1.4.1, the NEF component reliably ...

Original description

free5GC UDR is the user data repository (UDR) for free5GC, an an open-source project for 5th generation (5G) mobile core networks. In versions up to and including 1.4.1, the NEF component reliably leaks internal parsing error details (e.g., invalid character 'n' after top-level value) to remote clients, which can aid attackers in service fingerprinting. All deployments of free5GC using the Nnef_PfdManagement service may be affected. free5gc/udr pull request 56 contains a patch for the issue. There is no direct workaround at the application level. The recommendation is to apply the provided patch.

nvd CVSS3.1 5.3

nvd CVSS4.0 6.6

Vulnerability type

CWE-209

https://github.com/free5gc/free5gc/issues/753 Exploit Issue Tracking Patch Vendor Advisory
https://github.com/free5gc/free5gc/security/advisories/GHSA-6468-f87j-6g82 Vendor Advisory Patch
https://github.com/free5gc/udr/commit/754d23b03755ad59077ed529ce3b971e477080c4 Patch
https://github.com/free5gc/udr/pull/56 Issue Tracking Patch