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Cisco Adaptive Security Appliance Software VPN Authentication Bypass (cisco-sa-asaftd-multi-cert-dzA3h5PT)

medium Nessus Plugin ID 189993

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Synopsis

The remote device is missing a vendor-supplied security patch

Description

According to its self-reported version, Cisco ASA Software is affected by a Remote Access SSL VPN Multiple Certificate Authentication Bypass vulnerability that could allow an authenticated, remote attacker to bypass a configured multiple certificate authentication policy and connect using only a valid username and password.
This vulnerability is due to improper error handling during remote access VPN authentication. An attacker could exploit this vulnerability by sending crafted requests during remote access VPN session establishment. A successful exploit could allow the attacker to bypass the configured multiple certificate authentication policy while retaining the privileges and permissions associated with the original connection profile.

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

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Upgrade to the relevant fixed version referenced in Cisco bug IDs CSCwe20918

See Also

http://www.nessus.org/u?330ef64d

Plugin Details

Severity: Medium

ID: 189993

File Name: cisco-sa-asaftd-multi-cert-dzA3h5PT-asa.nasl

Version: 1.1

Type: local

Family: CISCO

Published: 2/5/2024

Updated: 2/6/2024

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 1.4

CVSS v2

Risk Factor: Medium

Base Score: 4

Temporal Score: 3

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

CVSS Score Source: CVE-2023-20247

CVSS v3

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.8

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

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:cisco:adaptive_security_appliance_software

Required KB Items: Host/Cisco/ASA

Exploit Ease: No known exploits are available

Patch Publication Date: 11/1/2023

Vulnerability Publication Date: 11/1/2023

Reference Information

CVE: CVE-2023-20247