free5GC AUSF: null byte injection in supiOrSuci causes HTTP 500 internal service failure
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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| free5gc | free5gc | affected |
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| free5gc | ausf | affected |
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| Free5gc | Ausf |
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| Free5gc | Free5gc |
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| Source | ID | Title |
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Github GHSA |
GHSA-qj55-47fp-p62j | free5GC AUSF: null byte injection in supiOrSuci causes HTTP 500 internal service failure |
No CVSS v3.1
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.737% probability within 30 days)
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| Metrics |
ssvc
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| Type | Values Removed | Values Added |
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| First Time appeared |
Free5gc
Free5gc ausf Free5gc free5gc |
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| Vendors & Products |
Free5gc
Free5gc ausf Free5gc free5gc |
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| Description | free5GC is an open-source implementation of the 5G core network. Prior to 1.4.5, the free5GC AUSF (Authentication Server Function) does not validate the supiOrSuci field in UE authentication requests. Null bytes (\x00) and other control characters pass through JSON parsing unchanged and are forwarded to the UDM in an unescaped URL path. This causes Go's net/url.Parse() to fail, returning HTTP 500 "System failure" and leaking internal stack traces. An unauthenticated attacker can trigger this at scale causing denial of service for all subscribers attempting authentication through the affected AUSF. This vulnerability is fixed in 1.4.5. | |
| Title | free5GC AUSF: null byte injection in supiOrSuci causes HTTP 500 internal service failure | |
| Weaknesses | CWE-20 | |
| References |
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| Metrics |
cvssV4_0
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