GHSA-qfxw-v8qx-vj3v
Ella Core Vulnerable to UE Downlink Redirection via Forged PDUSessionResourceSetupResponse
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| Go | github.com/ellanetworks/core | < 1.10.0 | 1.10.0 |
Details
As written in the advisory (Markdown source, shown as plain text).
## Summary
A radio with a valid NG Setup can send a forged PDUSessionResourceSetupResponse carrying any UE's AMF-UE-NGAP-ID. Ella Core does not verify the message arrived on the SCTP association bound to that UE's logical NG-connection, then creates a GTP tunnel towards that radio.
## Impact
Downlink user-plane traffic for the targeted UE is redirected to the attacker's radio.
## Fix
UE context lookups are now scoped to the sending radio's SCTP association.
References
External links from the advisory. They lead to third-party sites.