CVE-2021-40401 Explained : Impact and Mitigation
Understand the use-after-free vulnerability in Gerbv 2.7.0 and 2.7.1 (CVE-2021-40401). Learn about its impact, affected versions, exploitation, and mitigation steps.
This CVE record relates to a use-after-free vulnerability found in Gerbv software versions 2.7.0 and 2.7.1 that can be exploited by an attacker through a specially-crafted gerber file, potentially leading to code execution.
Understanding CVE-2021-40401
This section delves into the details of the vulnerability and its impact.
What is CVE-2021-40401?
A use-after-free vulnerability in the RS-274X aperture definition tokenization function of Gerbv 2.7.0 and dev (commit b5f1eacd) and Gerbv forked 2.7.1 allows an attacker to execute arbitrary code by providing a malicious gerber file.
The Impact of CVE-2021-40401
The vulnerability has a CVSS v3.0 base score of 10 (Critical) with a high impact on confidentiality and availability, and a low impact on integrity. It requires no user interaction and has a changed scope, making it a severe security risk.
Technical Details of CVE-2021-40401
Explore the technical aspects of the vulnerability in this section.
Vulnerability Description
The vulnerability arises due to a use-after-free issue in Gerbv software, facilitating code execution through a specially-crafted gerber file.
Affected Systems and Versions
- Vendor: n/a
- Product: Gerbv
- Affected Versions:
- Gerbv 2.7.0
- Gerbv forked 2.7.1
- Gerbv dev (commit b5f1eacd)
Exploitation Mechanism
The vulnerability can be exploited by providing a malicious gerber file, triggering the use-after-free condition and potentially leading to code execution.
Mitigation and Prevention
Learn how to mitigate the risks associated with CVE-2021-40401 in this section.
Immediate Steps to Take
- Update Gerbv to a patched version or apply vendor-supplied fixes.
- Avoid opening gerber files from untrusted sources.
Long-Term Security Practices
- Regularly update software and apply security patches promptly.
- Implement proper input validation procedures to prevent malicious file execution.
Patching and Updates
Install the latest updates and security patches provided by the vendor to address the vulnerability effectively.