| Título | Open5GS v2.7.6-103-g1c1d9e1 Denial of Service |
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| Descripción | Open5GS v2.7.6-103-g1c1d9e1 is affected by a denial-of-service vulnerability in its Diameter handling path when using the freeDiameter stack. When open5gs-hssd, or another Open5GS component using libfdproto/libfdcore, processes a malformed Diameter Capabilities-Exchange-Request (CER) containing an invalid Vendor-Specific-Application-Id grouped AVP with conflicting Auth-Application-Id occurrences, freeDiameter reaches an unrecoverable branch in parserules_check_one_rule() and calls abort().
As a result, the Open5GS daemon terminates with SIGABRT instead of rejecting the malformed Diameter message gracefully. An attacker with network access to the Diameter listener, commonly TCP/SCTP port 3868 depending on configuration, can trigger a crash and cause a denial of service in the affected Open5GS Diameter-facing component. |
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| Fuente | ⚠️ https://github.com/open5gs/open5gs/issues/4155 |
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| Usuario | WeiYi (UID 96864) |
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| Sumisión | 2026-06-24 08:30 (hace 2 meses) |
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| Moderación | 2026-08-09 19:44 (2 months later) |
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| Estado | Aceptado |
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| Entrada de VulDB | 387277 [Open5GS hasta 2.7.6 CER init.c diam_log_func denegación de servicio] |
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| Puntos | 20 |
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