// For flags

CVE-2020-10629

Advantech WebAccess/NMS MibbrowserTrapAddAction XML External Entity Reference Information Disclosure Vulnerability

Severity Score

7.5
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

WebAccess/NMS (versions prior to 3.0.2) does not sanitize XML input. Specially crafted XML input could allow an attacker to read sensitive files.

WebAccess/NMS (versiones anteriores a 3.0.2), no sanea una entrada XML. La entrada XML especialmente diseñada podría permitir a un atacante leer archivos confidenciales.

This vulnerability allows remote attackers to disclose sensitive information on affected installations of Advantech WebAccess/NMS. Authentication is not required to exploit this vulnerability.
The specific flaw exists within the processing of calls to the MibbrowserMibbrowserTrapAddAction method. Due to the improper restriction of XML External Entity (XXE) references, a specially crafted document specifying a URI causes the XML parser to access the URI and embed the contents back into the XML document for further processing. An attacker can leverage this vulnerability to disclose file contents in the context of SYSTEM.

*Credits: rgod of 9sg
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None
Attack Vector
Network
Attack Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
None
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2020-03-16 CVE Reserved
  • 2020-04-08 CVE Published
  • 2024-04-16 EPSS Updated
  • 2024-08-04 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-611: Improper Restriction of XML External Entity Reference
CAPEC
References (1)
URL Tag Source
https://www.us-cert.gov/ics/advisories/icsa-20-098-01 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\/nms
Search vendor "Advantech" for product "Webaccess\/nms"
 < 3.0.2
Search vendor "Advantech" for product "Webaccess\/nms" and version " < 3.0.2"
-
Affected