VDB-179946 · CVE-2021-21865 · TALOS-2021-1301

CODESYS Development System 3.5.16 PackageManagement.plugin ExtensionMethods.Clone 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.
5.3	$0-$5k	0.00

Summaryinfo

A vulnerability was found in CODESYS Development System 3.5.16 and classified as critical. This affects the function ExtensionMethods.Clone of the file PackageManagement.plugin. The manipulation results in deserialization. This vulnerability is identified as CVE-2021-21865. There is not any exploit available.

Detailsinfo

A vulnerability classified as critical has been found in CODESYS Development System 3.5.16. Affected is the function ExtensionMethods.Clone of the file PackageManagement.plugin. The manipulation with an unknown input leads to a deserialization vulnerability. CWE is classifying the issue as CWE-502. The product deserializes untrusted data without sufficiently verifying that the resulting data will be valid. This is going to have an impact on confidentiality, integrity, and availability.

The weakness was released 08/03/2021 as TALOS-2021-1301. The advisory is available at talosintelligence.com. This vulnerability is traded as CVE-2021-21865. Technical details are known, but there is no available exploit.

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

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

CODESYS

Name

Development System

Version

3.5.16

License

commercial

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.3

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
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: Partially

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 🔍
08/03/2021 +210 days 🔍
08/03/2021 +0 days 🔍
08/07/2021 +4 days 🔍

Sourcesinfo

Advisory: TALOS-2021-1301
Status: Not defined
Confirmation: 🔍

CVE: CVE-2021-21865 (🔍)
GCVE (CVE): GCVE-0-2021-21865
GCVE (VulDB): GCVE-100-179946

Entryinfo

Created: 08/03/2021 12:08
Updated: 08/07/2021 08:10
Changes: 08/03/2021 12:08 (38), 08/07/2021 08:10 (3)
Complete: 🔍
Cache ID: 216::103