VDB-181484 · CVE-2021-21869 · TALOS-2021-1306

CODESYS Development System 3.5.16/3.5.17 Engine Plugin deserialization

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.1	$0-$5k	0.00

Summaryinfo

A vulnerability, which was classified as critical, was found in CODESYS Development System 3.5.16/3.5.17. The affected element is an unknown function of the component Engine Plugin. Such manipulation leads to deserialization. This vulnerability is traded as CVE-2021-21869. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in CODESYS Development System 3.5.16/3.5.17. It has been rated as critical. Affected by this issue is some unknown functionality of the component Engine Plugin. The manipulation with an unknown input leads to a deserialization vulnerability. Using CWE to declare the problem leads to CWE-502. The product deserializes untrusted data without sufficiently verifying that the resulting data will be valid. Impacted is confidentiality, integrity, and availability.

The weakness was shared 08/25/2021 as TALOS-2021-1306. The advisory is shared for download at talosintelligence.com. This vulnerability is handled as CVE-2021-21869. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

CODESYS

Name

Development System

Version

License

commercial

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.1

VulDB Base Score: 6.3
VulDB Temp Score: 6.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Deserialization
CWE: CWE-502 / CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

01/04/2021 🔍
08/25/2021 +232 days 🔍
08/25/2021 +0 days 🔍
08/29/2021 +4 days 🔍

Sourcesinfo

Advisory: TALOS-2021-1306
Status: Not defined

CVE: CVE-2021-21869 (🔍)
GCVE (CVE): GCVE-0-2021-21869
GCVE (VulDB): GCVE-100-181484

Entryinfo

Created: 08/26/2021 00:04
Updated: 08/29/2021 11:54
Changes: 08/26/2021 00:04 (37), 08/29/2021 11:54 (2)
Complete: 🔍
Cache ID: 216::103