CVE-2018-7505

Advantech WebAccess NMS TFTP Unrestricted File Upload Remote Code Execution Vulnerability

Severity Score

9.8

*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, a TFTP application has unrestricted file uploads to the web application without authorization, which may allow an attacker to execute arbitrary code.

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 aplicación TFTP tiene subidas de archivo sin restricciones, lo que podría permitir que un atacante ejecute código arbitrario.

This vulnerability allows remote attackers to execute code on vulnerable installations of Advantech WebAccess NMS. Authentication is not required to exploit this vulnerability.
The specific flaw exists within the configuration of the TFTP service. The issue results from the lack of proper validation of user-supplied data, which can allow for the upload of arbitrary files. An attacker can leverage this vulnerability to execute code under the context of SYSTEM.

*Credits: rgod

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

Attack Vector

Network

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

2018-02-26 CVE Reserved
2018-05-15 CVE Published
2024-03-24 EPSS Updated
2024-09-16 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-264: Permissions, Privileges, and Access Controls
CWE-434: Unrestricted Upload of File with Dangerous Type

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