Denial of service in CODESYS V3 products



Published: 2021-05-03 | Updated: 2021-07-22
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-29241
CWE-ID CWE-476
Exploitation vector Network
Public exploit N/A
Vulnerable software
Subscribe
CODESYS Gateway V3
Client/Desktop applications / Other client software

CODESYS Edge Gateway for Linux
Client/Desktop applications / Other client software

CODESYS Control V3 Runtime System Toolkit
Client/Desktop applications / Other client software

CODESYS Development System
Client/Desktop applications / Other client software

CODESYS Edge Gateway for Windows
Client/Desktop applications / Other client software

Vendor

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) NULL pointer dereference

EUVDB-ID: #VU55243

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-29241

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error in the CmpGateway component. A remote attacker can pass specially crafted data to the application and perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

CODESYS Gateway V3: before 3.5.17.0

CODESYS Edge Gateway for Linux: before 4.1.0.0

CODESYS Control V3 Runtime System Toolkit: before 3.5.17.0

CODESYS Development System: before 3.5.17.0

CODESYS Edge Gateway for Windows: before 3.5.17.0

External links

http://customers.codesys.com/index.php
http://www.codesys.com/security/security-reports.html
http://customers.codesys.com/index.php?eID=dumpFile&t=f&f=14637&token=8dbd75ae7553ae3be25e22f741db783b31e14799&download=


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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