ellanetworks/core · Security
Ella Core Vulnerable to UE Downlink Redirection via Forged PDUSessionResourceSetupResponse
- GHSA ID
- GHSA-qfxw-v8qx-vj3v
- CVE ID
- CVE-2026-44473
- Severity
- high
- Published
- Updated
- CVSS
- 7.1 · CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
- CVSS v3
- 7.1 · CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
Description
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.
CWEs
- CWE-358 · Improperly Implemented Security Check for Standard
- CWE-863 · Incorrect Authorization