CVE-2024-20446
HighSummary
Podatność w agencie przekaźnika DHCPv6 oprogramowania Cisco NX-OS może umożliwić nieautoryzowanemu, zdalnemu atakującemu spowodowanie stanu odmowy usługi (DoS) na podatnym urządzeniu. Problem wynika z niewłaściwego przetwarzania określonych pól w wiadomości DHCPv6 RELAY-REPLY.
Risk Assessment
Atakujący może wykorzystać tę podatność, wysyłając spreparowany pakiet DHCPv6 do dowolnego adresu IPv6 skonfigurowanego na podatnym urządzeniu, co może prowadzić do wielokrotnego awarii procesu dhcp_snoop i ponownego uruchamiania urządzenia, co skutkuje stanem DoS.
Recommendation
Zaleca się aktualizację oprogramowania Cisco NX-OS do najnowszej wersji, aby usunąć tę podatność oraz monitorowanie ruchu DHCPv6 w celu wykrywania potencjalnych ataków.
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Original NVD description (English source)
A vulnerability in the DHCPv6 relay agent of Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper handling of specific fields in a DHCPv6 RELAY-REPLY message. An attacker could exploit this vulnerability by sending a crafted DHCPv6 packet to any IPv6 address that is configured on an affected device. A successful exploit could allow the attacker to cause the dhcp_snoop process to crash and restart multiple times, causing the affected device to reload and resulting in a DoS condition.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

