CVE-2021-35940 : What You Need to Know

This article provides an overview of CVE-2021-35940, a regression of CVE-2017-12613 affecting the Apache Portable Runtime (APR).

Understanding CVE-2021-35940

In this section, we will delve into the details of CVE-2021-35940 and its implications.

What is CVE-2021-35940?

The vulnerability involves an out-of-bounds array read in the apr_time_exp*() functions within the Apache Portable Runtime 1.7.0.

The Impact of CVE-2021-35940

The issue occurs due to a regression in version 1.7.0 compared to the previous 1.6.3 release, making it vulnerable to similar exploits.

Technical Details of CVE-2021-35940

This section will cover the technical aspects of the CVE-2021-35940 vulnerability.

Vulnerability Description

The vulnerability allows for an out-of-bounds array read in the apr_time_exp*() functions, potentially leading to exploitation.

Affected Systems and Versions

Apache Portable Runtime 1.7.0 is specifically impacted by this vulnerability.

Exploitation Mechanism

The regression in version 1.7.0 allows threat actors to exploit the out-of-bounds array read issue.

Mitigation and Prevention

Outlined below are the steps to mitigate and prevent potential exploits related to CVE-2021-35940.

Immediate Steps to Take

Update to the latest patched version of Apache Portable Runtime (APR) to address the vulnerability.
Monitor security advisories from Apache for any further updates.
Implement network security measures to detect and prevent unauthorized access.

Long-Term Security Practices

Regularly update and patch software to protect against known vulnerabilities.
Conduct security audits and penetration testing to identify and address weaknesses.

Patching and Updates

Ensure timely installation of security patches released by Apache to safeguard systems.