CVE-2018-8841

Advantech WebAccess Node Product Installation File Access Control Modification Privilege Escalation Vulnerability

Severity Score

7.8

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

In Advantech WebAccess versions V8.2_20170817 and prior, WebAccess versions V8.3.0 and prior, WebAccess Dashboard versions V.2.0.15 and prior, WebAccess Scada Node versions prior to 8.3.1, and WebAccess/NMS 2.0.3 and prior, an improper privilege management vulnerability may allow an authenticated user to modify files when read access should only be given to the user.

En Advantech WebAccess en versiones V8.2_20170817 y anteriores, WebAccess en versiones V8.3.0 y anteriores, WebAccess Dashboard en versiones V.2.0.15 y anteriores, WebAccess Scada Node en versiones anteriores a la 8.3.1 y WebAccess/NMS 2.0.3 y anteriores, una vulnerabilidad de gestión de privilegios incorrecta podría permitir que un usuario autenticado modifique archivos cuando el acceso de lectura solo se debería otorgar al usuario.

This vulnerability allows local attackers to escalate privilege on vulnerable installations of Advantech WebAccess Node. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability.
The specific flaw exists within the access control that is set and modified during the installation of the product. The product installation weakens access control restrictions of pre-existing system files and sets weak access control restrictions on new files. An attacker can leverage this vulnerability to execute arbitrary code under the context of Administrator, the IUSR account, or SYSTEM.

*Credits: Fritz Sands of the Zero Day Initiative

CVSS Scores

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Local

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

Attack Vector

Local

Attack Complexity

Low

Authentication

None

Confidentiality

Complete

Integrity

Complete

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2018-03-20 CVE Reserved
2018-05-15 CVE Published
2023-03-08 EPSS Updated
2024-09-16 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-269: Improper Privilege Management

CAPEC

References (2)

URL	Tag	Source
http://www.securityfocus.com/bid/104190	Third Party Advisory
https://ics-cert.us-cert.gov/advisories/ICSA-18-135-01	Third Party Advisory

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Advantech Search vendor "Advantech"		Webaccess Search vendor "Advantech" for product "Webaccess"				<= 8.2_20170817 Search vendor "Advantech" for product "Webaccess" and version " <= 8.2_20170817"		-		Affected
Advantech Search vendor "Advantech"		Webaccess Search vendor "Advantech" for product "Webaccess"				<= 8.3.0 Search vendor "Advantech" for product "Webaccess" and version " <= 8.3.0"		-		Affected
Advantech Search vendor "Advantech"		Webaccess Dashboard Search vendor "Advantech" for product "Webaccess Dashboard"				<= 2.0.15 Search vendor "Advantech" for product "Webaccess Dashboard" and version " <= 2.0.15"		-		Affected
Advantech Search vendor "Advantech"		Webaccess Scada Search vendor "Advantech" for product "Webaccess Scada"				< 8.3.1 Search vendor "Advantech" for product "Webaccess Scada" and version " < 8.3.1"		-		Affected
Advantech Search vendor "Advantech"		Webaccess\/nms Search vendor "Advantech" for product "Webaccess\/nms"				<= 2.0.3 Search vendor "Advantech" for product "Webaccess\/nms" and version " <= 2.0.3"		-		Affected