PT-2025-33315 · Cisco · Cisco Secure Firewall Asa+2

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CVE-2025-20136

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Publicado

2025-08-14

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Atualizado

2025-08-15

CVSS v3.1

8.6

Alta

VetorAV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Name of the Vulnerable Software and Affected Versions: Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software (affected versions not specified)
Description: A vulnerability in the function that performs IPv4 and IPv6 Network Address Translation (NAT) DNS inspection could allow an unauthenticated, remote attacker to cause the device to reload unexpectedly, resulting in a denial of service (DoS) condition. This issue is due to an infinite loop condition that occurs when a device processes DNS packets with DNS inspection enabled and is configured for NAT44, NAT64, or NAT46. An attacker could exploit this by sending crafted DNS packets that match a static NAT rule with DNS inspection enabled. A successful exploit could allow the attacker to create an infinite loop and cause the device to reload, resulting in a DoS condition.
Recommendations: At the moment, there is no information about a newer version that contains a fix for this vulnerability.

DoS

Infinite Loop

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Enumeração de Fraquezas

Identificadores relacionados

BDU:2025-10340
CVE-2025-20136

Produtos afetados

Cisco Asa
Cisco Secure Firewall Asa
Cisco Secure Firewall Threat Defense