CVE-2021-34569 : Exploit Details and Defense Strategies
Discover CVE-2021-34569, a critical Out-of-bounds Write vulnerability in WAGO I/O-Check Service impacting multiple products. Learn about the impact, affected systems, and mitigation steps.
A detailed analysis of CVE-2021-34569, a vulnerability found in WAGO I/O-Check Service that makes it prone to Out-of-bounds Write attacks.
Understanding CVE-2021-34569
In this section, we will delve deeper into the nature of CVE-2021-34569.
What is CVE-2021-34569?
CVE-2021-34569 is a vulnerability discovered in WAGO I/O-Check Service across multiple products. It allows an attacker to send a specially crafted packet containing OS commands, leading to a crash in the diagnostic tool and potential memory writing.
The Impact of CVE-2021-34569
The impact of this vulnerability is severe, with a CVSS base score of 9.8, categorizing it as critical. It has a high impact on confidentiality, integrity, and availability with low attack complexity via the network.
Technical Details of CVE-2021-34569
Let's explore the technical details of CVE-2021-34569.
Vulnerability Description
CVE-2021-34569 is classified as CWE-787, an Out-of-bounds Write vulnerability. This type of vulnerability involves writing past the end, or beginning, of an allocated buffer in memory.
Affected Systems and Versions
The vulnerability affects multiple products by WAGO, including 750-81xx/xxx-xxxFW, 750-82xx/xxx-xxx, 752-8303/8000-0002, 762-4xxx, 762-5xxx, and 762-6xxx, up to FW18 Patch 2.
Exploitation Mechanism
An attacker can exploit CVE-2021-34569 by sending a specially crafted packet with OS commands, causing the diagnostic tool to crash and potentially manipulate memory.
Mitigation and Prevention
Learn how to mitigate and prevent CVE-2021-34569.
Immediate Steps to Take
It is crucial to apply patches provided by WAGO to fix the vulnerability. Network segmentation and access controls can also help reduce the attack surface.
Long-Term Security Practices
Regularly updating software, conducting security assessments, and educating users on safe practices can enhance long-term security.
Patching and Updates
Stay informed about security updates and patches released by WAGO to address CVE-2021-34569.