Cisco Adaptive Security Appliance VPN SAML Authentication Bypass Vulnerability (cisco-sa-20190501-asaftd-saml-vpn)

high Nessus Plugin ID 128063

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Synopsis

The remote device is missing a vendor-supplied security patch

Description

According to its self-reported version the Cisco Adaptive Security Appliance (ASA) software running on the remote device is affected by an authentication bypass vulnerability in the implementation of Security Assertion Markup Language (SAML) 2.0 Single Sign-On (SSO) for Clientless SSL VPN (WebVPN) and AnyConnect Remote Access VPN.
The vulnerability is due to improper credential management when using NT LAN Manager (NTLM) or basic authentication. An attacker could exploit this vulnerability by opening a VPN session to an affected device after another VPN user has successfully authenticated to the affected device via SAML SSO. A successful exploit could allow the attacker to connect to secured networks behind the affected device.
(CVE-2019-1714)

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

Solution

Upgrade to the relevant fixed version referenced in Cisco bug ID CSCvn72570.

Plugin Details

Severity: High

ID: 128063

File Name: cisco-sa-20190501-asaftd-saml-vpn-asa.nasl

Version: 1.9

Type: local

Family: CISCO

Published: 8/22/2019

Updated: 3/31/2023

Configuration: Enable paranoid mode

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2019-1714

CVSS v3

Risk Factor: High

Base Score: 8.6

Temporal Score: 7.5

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

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

Vulnerability Information

CPE: cpe:/o:cisco:firepower_threat_defense

Required KB Items: Host/Cisco/ASA, Host/Cisco/ASA/model, Settings/ParanoidReport

Exploit Ease: No known exploits are available

Patch Publication Date: 5/1/2019

Vulnerability Publication Date: 5/1/2019

Reference Information

CVE: CVE-2019-1714

BID: 108185

CWE: 255

CISCO-SA: cisco-sa-20190501-asaftd-saml-vpn

IAVA: 2019-A-0271-S

CISCO-BUG-ID: CSCvn72570

Detections

Analytics