Advantech WebAccess Authentication Bypass

critical Nessus Plugin ID 96875
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Synopsis

The remote host is running a web application that is affected by an authentication bypass vulnerability.

Description

The Advantech WebAccess web server running on the remote host is affected by an authentication bypass vulnerability in the WaExlViewer component due to a failure to properly manage authentication. An unauthenticated, remote attacker can exploit this, via a POST request with specially crafted parameters, to bypass intended restrictions, allowing the attacker to access restricted pages, upload template files, and delete existing templates.

Solution

Contact the vendor for a solution.

See Also

https://www.tenable.com/security/research/tra-2017-04

https://ics-cert.us-cert.gov/advisories/ICSA-17-012-01

https://www.zerodayinitiative.com/advisories/ZDI-17-043/

Plugin Details

Severity: Critical

ID: 96875

File Name: scada_advantech_webaccess_cve-2017-5152.nbin

Version: 1.65

Type: remote

Family: SCADA

Published: 1/30/2017

Updated: 12/20/2021

Dependencies: scada_advantech_webaccess_detect.nbin

Risk Information

CVSS Score Source: CVE-2017-5152

VPR

Risk Factor: Medium

Score: 5.2

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 5

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

Temporal Vector: E:POC/RL:OF/RC:C

CVSS v3

Risk Factor: Critical

Base Score: 9.1

Temporal Score: 8.2

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

Temporal Vector: E:P/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:advantech:webaccess

Required KB Items: www/scada_advantech_webaccess

Exploit Available: true

Exploit Ease: Exploits are available

Exploited by Nessus: true

Patch Publication Date: 1/12/2017

Vulnerability Publication Date: 1/12/2017

Reference Information

CVE: CVE-2017-5152

BID: 95410

ICSA: 17-012-01

TRA: TRA-2017-04

ZDI: ZDI-17-043