CVE-2025-20191
HighSummary
Podatność w funkcjach zabezpieczeń zintegrowanych Switch (SISF) oprogramowania Cisco IOS, Cisco IOS XE, Cisco NX-OS oraz Cisco Wireless LAN Controller (WLC) AireOS może pozwolić nieautoryzowanemu, sąsiedniemu atakującemu na spowodowanie stanu odmowy usługi (DoS) na podatnym urządzeniu. Problem wynika z nieprawidłowego przetwarzania pakietów DHCPv6.
Risk Assessment
Atakujący może wykorzystać tę podatność, wysyłając spreparowany pakiet DHCPv6 do podatnego urządzenia, co może prowadzić do jego ponownego uruchomienia i w rezultacie do stanu DoS. To może wpłynąć na dostępność usług w organizacji.
Recommendation
Zaleca się aktualizację oprogramowania do najnowszej wersji, która zawiera poprawki zabezpieczeń dotyczące tej podatności. Dodatkowo, warto monitorować ruch DHCPv6 w sieci w celu wykrywania potencjalnych prób ataków.
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Original NVD description (English source)
A vulnerability in the Switch Integrated Security Features (SISF) of Cisco IOS Software, Cisco IOS XE Software, Cisco NX-OS Software, and Cisco Wireless LAN Controller (WLC) AireOS Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to the incorrect handling of DHCPv6 packets. An attacker could exploit this vulnerability by sending a crafted DHCPv6 packet to an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

