PT-2021-7789 · 3S Smart Software Solutions · Codesys Gateway V3

Published 2021-05-03 · Updated 2026-05-29 · CVE-2021-29241

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

Name of the Vulnerable Software and Affected Versions CODESYS Gateway 3 versions prior to 3.5.17.0

Description The issue is related to a NULL pointer dereference error in the CODESYS Gateway 3 software. This error may result in a denial of service (DoS). The vulnerability can be exploited by a remote attacker to cause a service disruption.

Recommendations For versions prior to 3.5.17.0, update to version 3.5.17.0 or later to resolve the issue. As a temporary workaround, consider implementing additional monitoring and failover measures to minimize the impact of a potential denial of service.

Fix

DoS

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

BDU:2023-02904

CVE-2021-29241

Affected Products

Codesys Gateway V3

References · 10

• https://customers.codesys.com/index.php?eID=dumpFile&t=f&f=14637&token=8dbd75ae7553ae3be25e22f741db783b31e14799&download= · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-29241 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-29241 · Security Note
• https://bdu.fstec.ru/vul/2023-02904 · Security Note
• https://codesys.com/security/security-reports.html · Vendor Advisory
• https://customers.codesys.com/index.php · Vendor Advisory
• https://se.com/ae/en/download/document/SEVD-2022-011-06 · Note
• https://t.me/cveNotify/165218 · Telegram Post
• https://customers.codesys.com/index.php?eID=dumpFile&t=f&f=14637&token=8dbd75ae7553ae3be25e22f741db783b31e14799&download= · Note
• https://t.me/cvenotify/14365 · Telegram Post