CVE-2021-32765 : What You Need to Know

A detailed overview of CVE-2021-32765, a vulnerability related to integer overflow leading to buffer overflow in Hiredis.

Understanding CVE-2021-32765

This section provides insights into the impact, technical details, and mitigation strategies for CVE-2021-32765.

What is CVE-2021-32765?

CVE-2021-32765 involves an Integer Overflow vulnerability in Hiredis, a C client library for the Redis database, triggered by malformed

RESP

mult-bulk

protocol data.

The Impact of CVE-2021-32765

The vulnerability in Hiredis could allow an attacker to trigger a buffer overflow by providing maliciously crafted or corrupted data, potentially leading to remote code execution.

Technical Details of CVE-2021-32765

This section delves into the specifics of the vulnerability, affected systems, and the exploitation mechanism.

Vulnerability Description

Hiredis fails to check the size of memory allocation properly, potentially resulting in a buffer overflow when parsing certain replies.

Affected Systems and Versions

The vulnerability affects Hiredis versions prior to 1.0.1, specifically those processing

multi-bulk

responses.

Exploitation Mechanism

By supplying carefully crafted data, an attacker can exploit the integer overflow to execute arbitrary code or crash the application.

Mitigation and Prevention

Learn about the immediate steps, security best practices, and patching procedures to safeguard systems against CVE-2021-32765.

Immediate Steps to Take

Users are advised to update Hiredis to versions beyond 1.0.1 or apply available security patches to address the vulnerability.

Long-Term Security Practices

Implement secure coding practices, limit access to vulnerable services, and prioritize regular software updates to enhance overall system security.

Patching and Updates

Stay informed about security advisories, follow vendor recommendations, and promptly apply relevant patches to mitigate associated risks.