CVE-2020-28636 Explained : Impact and Mitigation

CVE-2020-28636 is a code execution vulnerability in the Nef polygon-parsing functionality of CGAL libcgal CGAL-5.1.1. This vulnerability allows an attacker to trigger an out-of-bounds read by providing malicious input.

Understanding CVE-2020-28636

This section provides insights into the nature and impact of CVE-2020-28636.

What is CVE-2020-28636?

CVE-2020-28636 is a critical code execution vulnerability in CGAL libcgal CGAL-5.1.1, specifically in the Nef polygon-parsing functionality. It stems from an out-of-bounds read issue in Nef_S2/SNC_io_parser.h SNC_io_parser::read_sloop() slh->twin().

The Impact of CVE-2020-28636

The vulnerability poses a severe threat as it allows an attacker to execute arbitrary code, potentially leading to a compromise of the affected system. With a CVSS base score of 10, it is classified as critical due to its high impact on confidentiality, integrity, and availability.

Technical Details of CVE-2020-28636

This section delves into the technical aspects of CVE-2020-28636.

Vulnerability Description

The vulnerability arises from improper validation of array indexes, categorized under CWE-129. It enables an attacker to exploit the Nef polygon-parsing functionality to execute malicious code.

Affected Systems and Versions

Vendor: n/a
Product: CGAL
Affected Version: CGAL Project libcgal CGAL-5.1.1

Exploitation Mechanism

The vulnerability can be exploited by providing specially crafted input to the Nef polygon-parsing functionality, triggering the out-of-bounds read and potentially leading to code execution.

Mitigation and Prevention

In this section, we discuss the steps to mitigate and prevent exploitation of CVE-2020-28636.

Immediate Steps to Take

Apply the latest security updates provided by the vendor.
Implement proper input validation mechanisms to prevent malicious input.
Monitor network traffic for any suspicious activities.

Long-Term Security Practices

Conduct regular security assessments and code reviews.
Train developers on secure coding practices to prevent similar vulnerabilities.
Keep abreast of security advisories and patches for the software in use.

Patching and Updates

Ensure timely installation of security patches released by the vendor to address the vulnerability.