| Título | Open5GS v2.7.6 Denial of Service |
|---|
| Descrição | Open5GS v2.7.6 is affected by a denial-of-service condition in the Diameter/S6a handling path of open5gs-hssd when processing a malformed Diameter Update-Location-Request (ULR) message. After a Diameter peer establishes an SCTP connection and completes a standard Capabilities-Exchange-Request (CER) registration step, a malformed ULR message with an invalid or missing Session-Id AVP can trigger an assertion failure inside the freeDiameter session management logic. The crash occurs in fd_msg_sess_get(), where the assertion `avp->avp_public.avp_value' fails. As a result, the open5gs-hssd process terminates with SIGABRT instead of rejecting the malformed Diameter message gracefully. An attacker with network access to the Diameter listener can send a crafted ULR message and crash the HSS service, causing a denial of service. |
|---|
| Fonte | ⚠️ https://github.com/open5gs/open5gs/issues/4190 |
|---|
| Utilizador | WeiYi (UID 96864) |
|---|
| Submissão | 24/06/2026 08h37 (há 2 meses) |
|---|
| Moderação | 09/08/2026 19h45 (2 months later) |
|---|
| Estado | Aceite |
|---|
| Entrada VulDB | 387279 [Open5GS até 2.7.6 HSS Service fd_msg_sess_get Session-Id Negação de Serviço] |
|---|
| Pontos | 20 |
|---|