CVE-2026-20004
HighSummary
Podatność w bibliotece TLS oprogramowania Cisco IOS XE może pozwolić nieautoryzowanemu, sąsiedniemu atakującemu na wyczerpanie dostępnej pamięci urządzenia. Problem wynika z niewłaściwego zarządzania zasobami pamięci podczas nawiązywania połączenia TLS.
Risk Assessment
Wykorzystanie tej podatności może prowadzić do wyczerpania pamięci urządzenia, co skutkuje nieoczekiwanym przeładowaniem i stanem odmowy usługi (DoS).
Recommendation
Zaleca się monitorowanie i ograniczenie prób uwierzytelniania EAP oraz wdrożenie zabezpieczeń przed atakami typu machine-in-the-middle, aby zminimalizować ryzyko wykorzystania tej podatności.
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Original NVD description (English source)
A vulnerability in the TLS library of Cisco IOS XE Software could allow an unauthenticated, adjacent attacker to exhaust the available memory of an affected device. This vulnerability is due to improper management of memory resources during TLS connection setup. An attacker could exploit this vulnerability by repeatedly triggering the conditions that cause the memory increase. This could be done in a variety of ways, such as by repeatedly attempting Extensible Authentication Protocol (EAP) authentication when local EAP is enabled on an affected device or by using a machine-in-the-middle attack and resetting TLS connections between the affected device and other devices. A successful exploit could allow the attacker to exhaust the available memory on an affected device, resulting in an unexpected reload and a denial of service (DoS) condition.