// For flags

CVE-2020-12497

Phoenix Contact Automation Worx <= 1.87: stack-based overflow

Severity Score

7.8
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

PLCopen XML file parsing in Phoenix Contact PC Worx and PC Worx Express version 1.87 and earlier can lead to a stack-based overflow. Manipulated PC Worx projects could lead to a remote code execution due to insufficient input data validation.

El análisis de archivos XML de PLCopen en Phoenix Contact PC Worx y PC Worx Express versiones 1.87 y anteriores, puede conllevar un desbordamiento en la región stack de la memoria. Los proyectos manipulados de PC Worx podrían conducir a una ejecución de código remota debido a una comprobación de datos de entrada insuficiente

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Phoenix Contact Automationworx. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.
The specific flaw exists within the parsing of PLCOpen XML files. When parsing the pou element, the process does not properly validate the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process.

*Credits: reported by Natnael Samson working with Trend Micro Zero Day Initiative, Phoenix Contact reported to CERT@VDE
CVSS Scores
Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Network
Attack Complexity
Medium
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2020-04-30 CVE Reserved
  • 2020-07-01 CVE Published
  • 2024-08-04 CVE Updated
  • 2024-11-12 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-121: Stack-based Buffer Overflow
  • CWE-787: Out-of-bounds Write
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Phoenixcontact
Search vendor "Phoenixcontact"
 Pc Worx
Search vendor "Phoenixcontact" for product "Pc Worx"
 < 1.87
Search vendor "Phoenixcontact" for product "Pc Worx" and version " < 1.87"
-
Affected
Phoenixcontact
Search vendor "Phoenixcontact"
 Pc Worx Express
Search vendor "Phoenixcontact" for product "Pc Worx Express"
 <= 1.87
Search vendor "Phoenixcontact" for product "Pc Worx Express" and version " <= 1.87"
-
Affected