CVE-2021-33235 : What You Need to Know

A buffer overflow vulnerability in write_node in htmldoc through version 1.9.11 can lead to a denial of service attack. Attackers exploit this vulnerability via htmldoc/html.cxx:588.

Understanding CVE-2021-33235

This section delves into the details of the CVE-2021-33235 vulnerability.

What is CVE-2021-33235?

The CVE-2021-33235 refers to a buffer overflow vulnerability in write_node in htmldoc through 1.9.11. This flaw allows threat actors to trigger a denial of service using htmldoc/htmldoc/html.cxx:588.

The Impact of CVE-2021-33235

The impact of this vulnerability is significant as attackers can exploit it to cause a denial of service on the affected systems.

Technical Details of CVE-2021-33235

This section outlines the technical specifics of CVE-2021-33235.

Vulnerability Description

The vulnerability lies in the write_node function of htmldoc through version 1.9.11, enabling attackers to execute a denial of service attack.

Affected Systems and Versions

All versions of htmldoc up to 1.9.11 are susceptible to this buffer overflow vulnerability.

Exploitation Mechanism

By utilizing the specific code path htmldoc/html.cxx:588, threat actors can trigger the buffer overflow to orchestrate a denial of service attack.

Mitigation and Prevention

Protective measures and steps to mitigate the risks associated with CVE-2021-33235.

Immediate Steps to Take

Immediately update the htmldoc software to the latest version available to patch the vulnerability and prevent exploitation.

Long-Term Security Practices

Incorporate secure coding practices, regular security audits, and ongoing monitoring of software vulnerabilities to enhance long-term security.

Patching and Updates

Stay informed about security advisories related to htmldoc and promptly apply patches or updates to safeguard the systems against potential threats.