Cisco Adaptive Security Appliance Username Enumeration Information Disclosure Vulnerability (CSCvd47888)

high Nessus Plugin ID 102499

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Synopsis

The remote device is missing a vendor-supplied security patch.

Description

According to its self-reported version and configuration, the Cisco Adaptive Security Appliance (ASA) software running on the remote device is affected by a vulnerability in the web-based management interface of Cisco Adaptive Security Appliance (ASA) that could allow an authenticated, remote attacker to determine valid usernames.

The vulnerability is due to the interaction between Lightweight Directory Access Protocol (LDAP) and SSL Connection Profile when they are configured together. An attacker could exploit the vulnerability by performing a username enumeration attack to the IP address of the device. An exploit could allow the attacker to determine valid usernames.

Solution

Upgrade to the relevant fixed version referenced in Cisco security advisory cisco-sa-20170802-asa2.

The ASA administrator can use the following command to disable on-board password management:

tunnel-group DefaultWEBVPNGroup general-attributes no password-management

Plugin Details

Severity: High

ID: 102499

File Name: cisco-sa-20170802-asa2.nasl

Version: 1.6

Type: local

Family: CISCO

Published: 8/15/2017

Updated: 11/12/2019

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2017-6752

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/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, Host/Cisco/ASA/model

Exploit Ease: No known exploits are available

Patch Publication Date: 8/2/2017

Vulnerability Publication Date: 2/8/2017

Reference Information

CVE: CVE-2017-6752

CISCO-SA: cisco-sa-20170802-asa2

CISCO-BUG-ID: CSCvd47888

Detections

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