| Título | Open5GS UDP malformed packet Denial of Service |
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| Descripción | Open5Gs (versions 2.4.10 and earlier) is vulnerable to a Denial of Service attack through a malformed UDP packet. Packets are improperly validated in functions within lib/core/ogs-tlv-msg.c and lib/core/ogs-tlv.c
Both 5G and EPC (4G) use two signalling protocols: GTP (GPRS Tunnelling Protocol) and PFCP (Packet Forwarding Control Protocol). The former runs over 2123/UDP (GTP-C) and 2152/UDP (GTP-U), whereas the latter runs over 8805/UDP. There are four core components which listen to incoming UDP connections on those ports: SGW-C, SGW-U, SMF and UPF.
A UDP malformed packet sent to one of those sockets triggers the crash of the target component (either SGW-C, SGW-U, SMF or UPF). Since they are key components within 5G/EPC core networks, this attack could deny the service of the whole architecture.
The issue has been already reported and corrected (pull request merge is pending): https://github.com/open5gs/open5gs/issues/1767
Researcher: Pablo Valle Alvear
Alias: Popvlvs
Company: Titanium Industrial Security
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| Fuente | ⚠️ https://github.com/open5gs/open5gs/issues/1767 |
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| Usuario | popvlvs (UID 32693) |
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| Sumisión | 2022-09-28 11:44 (hace 4 años) |
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| Moderación | 2022-09-28 15:08 (3 hours later) |
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| Estado | Aceptado |
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| Entrada de VulDB | 209686 [Open5GS hasta 2.4.10 UDP Packet lib/core/ogs-tlv-msg.c denegación de servicio] |
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| Puntos | 20 |
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