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Vulnerability DatabaseCVE-2021-29241

CVE-2021-29241: 
NixOS vulnerability analysis and mitigation

Overview

CODESYS Gateway 3 before version 3.5.16.70 contains a NULL pointer dereference vulnerability that may result in a denial of service (DoS) condition. The vulnerability was disclosed on May 3, 2021 and is tracked as CVE-2021-29241 (NVD).

Technical details

The vulnerability is classified as a NULL Pointer Dereference (CWE-476) with a CVSS v3.1 Base Score of 7.5 HIGH. The attack vector is network-based (AV:N), with low attack complexity (AC:L), requiring no privileges (PR:N) or user interaction (UI:N). While the scope is unchanged (S:U), the vulnerability impacts only availability (A:H) with no effect on confidentiality (C:N) or integrity (I:N) (NVD).

Impact

The successful exploitation of this vulnerability can lead to a denial of service condition in the affected CODESYS Gateway 3 systems, potentially disrupting industrial automation processes that rely on the gateway functionality (Hacker News).

Mitigation and workarounds

The primary mitigation is to upgrade CODESYS Gateway 3 to version 3.5.16.70 or later. Organizations should also follow general security best practices such as network segmentation and restricting access to industrial control systems (CODESYS Security).

Additional resources

Source: This report was generated using AI

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