CVE-2025-20241
HighSummary
Podatność w funkcji IS-IS oprogramowania Cisco NX-OS dla przełączników Cisco Nexus 3000 i 9000 w trybie samodzielnym może pozwolić nieautoryzowanemu atakującemu z sąsiedztwa na nieoczekiwane zrestartowanie procesu IS-IS, co może spowodować ponowne załadowanie urządzenia.
Risk Assessment
Ryzyko dla organizacji polega na możliwości wystąpienia warunków odmowy usługi (DoS) w wyniku nieoczekiwanego restartu procesu IS-IS, co może prowadzić do przestojów w działaniu sieci.
Recommendation
Zaleca się monitorowanie ruchu IS-IS oraz wdrożenie odpowiednich środków zabezpieczających, aby ograniczyć dostęp do urządzeń tylko dla zaufanych sąsiadów warstwy 2.
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Original NVD description (English source)
A vulnerability in the Intermediate System-to-Intermediate System (IS-IS) feature of Cisco NX-OS Software for Cisco Nexus 3000 Series Switches and Cisco Nexus 9000 Series Switches in standalone NX-OS mode could allow an unauthenticated, adjacent attacker to cause the IS-IS process to unexpectedly restart, which could cause an affected device to reload. This vulnerability is due to insufficient input validation when parsing an ingress IS-IS packet. An attacker could exploit this vulnerability by sending a crafted IS-IS packet to an affected device. A successful exploit could allow the attacker to cause the unexpected restart of the IS-IS process, which could cause the affected device to reload, resulting in a denial of service (DoS) condition. Note: The IS-IS protocol is a routing protocol. To exploit this vulnerability, an attacker must be Layer 2-adjacent to the affected device.