CVE-2021-37179 : Exploit Details and Defense Strategies

A vulnerability has been identified in Solid Edge SE2021 (All Versions < SE2021MP7) where the PSKERNEL.dll library lacks proper validation while parsing user-supplied OBJ files, leading to a use-after-free condition that could allow an attacker to execute code in the current process. This CVE was assigned by Siemens and published on August 10, 2021.

Understanding CVE-2021-37179

This section will provide insights into the nature and impact of the vulnerability.

What is CVE-2021-37179?

CVE-2021-37179 is a use-after-free vulnerability in Solid Edge SE2021, specifically affecting all versions prior to SE2021MP7. The issue arises from inadequate validation in the PSKERNEL.dll library during the parsing of OBJ files.

The Impact of CVE-2021-37179

The vulnerability could be exploited by malicious actors to execute arbitrary code within the context of the affected application, potentially leading to a compromise of the system.

Technical Details of CVE-2021-37179

In this section, we will delve into the specifics of the vulnerability.

Vulnerability Description

The use-after-free flaw in PSKERNEL.dll enables an attacker to manipulate memory after it has been freed, allowing for the execution of unauthorized code in the application's process space.

Affected Systems and Versions

Solid Edge SE2021 versions preceding SE2021MP7 are impacted by this vulnerability.

Exploitation Mechanism

By crafting a malicious OBJ file and convincing a user to open it with the vulnerable application, an attacker can trigger the use-after-free condition and execute arbitrary code.

Mitigation and Prevention

Here we present strategies to mitigate the risks associated with CVE-2021-37179.

Immediate Steps to Take

Users are advised to update the Solid Edge software to version SE2021MP7 or later to address this vulnerability. Additionally, caution should be exercised when opening files from untrusted sources.

Long-Term Security Practices

Regularly updating software, implementing security patches promptly, and maintaining awareness of potential threats are essential for robust cybersecurity.

Patching and Updates

Organizations should prioritize patch management protocols and ensure that all software is kept up to date to prevent exploitation of known vulnerabilities.