CVE-2022-23850 : What You Need to Know

A stack-based buffer overflow vulnerability has been identified in xhtml_translate_entity in epub2txt (aka epub2txt2) through version 2.02. An attacker can exploit this issue by crafting a malicious EPUB document.

Understanding CVE-2022-23850

This CVE describes a critical vulnerability in the software that can lead to unauthorized access and potential system compromise.

What is CVE-2022-23850?

The vulnerability exists in xhtml_translate_entity in epub2txt, allowing attackers to trigger a stack-based buffer overflow through a specially crafted EPUB file.

The Impact of CVE-2022-23850

Exploitation of this vulnerability can result in arbitrary code execution, leading to a complete compromise of the affected system.

Technical Details of CVE-2022-23850

This section provides more insight into the vulnerability's description, affected systems, and the exploitation mechanism.

Vulnerability Description

The vulnerability stems from a stack-based buffer overflow in xhtml_translate_entity function, introduced in epub2txt version 2.02.

Affected Systems and Versions

All versions of epub2txt up to and including 2.02 are impacted by this vulnerability.

Exploitation Mechanism

By enticing a user to open a malicious EPUB document, an attacker can overflow the stack buffer and execute arbitrary code on the target system.

Mitigation and Prevention

To safeguard your systems from potential exploitation, follow the recommended steps below:

Immediate Steps to Take

Avoid opening or interacting with untrusted EPUB files.
Implement network-level detection mechanisms to identify and block malicious EPUB downloads.

Long-Term Security Practices

Regularly update epub2txt software to the latest patched version.
Consider implementing file type restrictions to prevent the execution of suspicious file formats.

Patching and Updates

Monitor official sources for security updates and apply patches promptly to address known vulnerabilities in epub2txt.