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Cisco Adaptive Security Appliance Software Inactive-to-Active ACL Bypass (cisco-sa-asaftd-ogsnsg-aclbyp-3XB8q6jX)

medium Nessus Plugin ID 265857

Synopsis

The remote device is missing a vendor-supplied security patch

Description

A vulnerability in the activation of an access control list (ACL) on Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to bypass the protection that is offered by a configured ACL on an affected device. This vulnerability is due to a logic error that occurs when an ACL changes from inactive to active in the running configuration of an affected device. An attacker could exploit this vulnerability by sending traffic through the affected device that should be denied by the configured ACL. The reverse condition is also true-traffic that should be permitted could be denied by the configured ACL. A successful exploit could allow the attacker to bypass configured ACL protections on the affected device, allowing the attacker to access trusted networks that the device might be protecting.

Please see the included Cisco BIDs and Cisco Security Advisory for more information.

Solution

Upgrade to the relevant fixed version referenced in Cisco bug ID CSCwi17713

See Also

http://www.nessus.org/u?b8668e0f

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwi17713

Plugin Details

Severity: Medium

ID: 265857

File Name: cisco-sa-asaftd-ogsnsg-aclbyp-3XB8q6jX-asa.nasl

Version: 1.1

Type: local

Family: CISCO

Published: 9/25/2025

Updated: 9/25/2025

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 1.6

CVSS v2

Risk Factor: Medium

Base Score: 5

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:N

CVSS Score Source: CVE-2024-20293

CVSS v3

Risk Factor: Medium

Base Score: 5.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N

Vulnerability Information

CPE: cpe:/a:cisco:adaptive_security_appliance_software

Required KB Items: Host/Cisco/ASA/model

Patch Publication Date: 5/22/2024

Vulnerability Publication Date: 5/22/2024

Reference Information

CVE: CVE-2024-20293