7.8
HIGH
CVE-2021-21866
CODESYS Development System Deserialization Command Execution Vulnerability
Description

A unsafe deserialization vulnerability exists in the ObjectManager.plugin ProfileInformation.ProfileData functionality of CODESYS GmbH CODESYS Development System 3.5.16 and 3.5.17. A specially crafted file can lead to arbitrary command execution. An attacker can provide a malicious file to trigger this vulnerability.

INFO

Published Date :

Aug. 2, 2021, 9:15 p.m.

Last Modified :

Sept. 30, 2022, 3:09 a.m.

Remotely Exploitable :

No

Impact Score :

5.9

Exploitability Score :

1.8
Affected Products

The following products are affected by CVE-2021-21866 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Codesys development_system
2 Codesys codesys
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2021-21866.

URL Resource
https://customers.codesys.com/index.php?eID=dumpFile&t=f&f=16805&token=ee583c498941d9fda86490bca98ff21928eec08a&download= Mitigation Patch Vendor Advisory
https://talosintelligence.com/vulnerability_reports/TALOS-2021-1301 Not Applicable Third Party Advisory
https://talosintelligence.com/vulnerability_reports/TALOS-2021-1303 Exploit Third Party Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2021-21866 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2021-21866 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • Modified Analysis by [email protected]

    Sep. 30, 2022

    Action Type Old Value New Value
    Changed Reference Type https://customers.codesys.com/index.php?eID=dumpFile&t=f&f=16805&token=ee583c498941d9fda86490bca98ff21928eec08a&download= Vendor Advisory https://customers.codesys.com/index.php?eID=dumpFile&t=f&f=16805&token=ee583c498941d9fda86490bca98ff21928eec08a&download= Mitigation, Patch, Vendor Advisory
    Changed Reference Type https://talosintelligence.com/vulnerability_reports/TALOS-2021-1301 Not Applicable https://talosintelligence.com/vulnerability_reports/TALOS-2021-1301 Not Applicable, Third Party Advisory
  • CVE Modified by [email protected]

    Apr. 28, 2022

    Action Type Old Value New Value
    Added CWE Talos CWE-502
  • CVE Modified by [email protected]

    Apr. 19, 2022

    Action Type Old Value New Value
    Added CVSS V3 Talos AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
  • Initial Analysis by [email protected]

    Aug. 11, 2021

    Action Type Old Value New Value
    Added CVSS V2 Metadata Victim must voluntarily interact with attack mechanism
    Added CVSS V2 NIST (AV:N/AC:M/Au:N/C:P/I:P/A:P)
    Added CVSS V3.1 NIST AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
    Changed Reference Type https://customers.codesys.com/index.php?eID=dumpFile&t=f&f=16805&token=ee583c498941d9fda86490bca98ff21928eec08a&download= No Types Assigned https://customers.codesys.com/index.php?eID=dumpFile&t=f&f=16805&token=ee583c498941d9fda86490bca98ff21928eec08a&download= Vendor Advisory
    Changed Reference Type https://talosintelligence.com/vulnerability_reports/TALOS-2021-1301 No Types Assigned https://talosintelligence.com/vulnerability_reports/TALOS-2021-1301 Not Applicable
    Added Reference https://talosintelligence.com/vulnerability_reports/TALOS-2021-1303 [Exploit, Third Party Advisory]
    Added CWE NIST CWE-502
    Added CPE Configuration OR *cpe:2.3:a:codesys:development_system:3.5.16.0:*:*:*:*:*:*:* *cpe:2.3:a:codesys:development_system:3.5.17.0:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Aug. 04, 2021

    Action Type Old Value New Value
    Added Reference https://customers.codesys.com/index.php?eID=dumpFile&t=f&f=16805&token=ee583c498941d9fda86490bca98ff21928eec08a&download= [No Types Assigned]
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2021-21866 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2021-21866 weaknesses.

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.09 }} 0.00%

score

0.37737

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability