CVE-2021-29477 : Vulnerability Insights and Analysis

A vulnerability has been identified in Redis, specifically in the STRALGO LCS command. This CVE has a high severity score and could potentially lead to remote code execution. Read on to understand the impact, technical details, and mitigation strategies related to CVE-2021-29477.

Understanding CVE-2021-29477

This section provides an overview of the Redis vulnerability identified in the STRALGO LCS command.

What is CVE-2021-29477?

CVE-2021-29477 is a vulnerability in Redis, an open-source in-memory data structure store. The issue arises from an integer overflow bug present in Redis versions 6.0 or newer.

The Impact of CVE-2021-29477

The vulnerability allows attackers to exploit the

STRALGO LCS

command, leading to heap corruption and potentially enabling remote code execution. The severity is rated as high due to its significant impact on confidentiality, integrity, and availability.

Technical Details of CVE-2021-29477

This section delves into the technical aspects of the vulnerability, including how systems are affected and how the exploit can be carried out.

Vulnerability Description

The integer overflow bug in Redis versions >= 6.0.0 and < 6.2.3 can be leveraged using the

STRALGO LCS

command to corrupt the heap memory.

Affected Systems and Versions

The vulnerability affects Redis versions >= 6.0.0 and < 6.2.3, leaving systems within this range exposed to potential exploitation.

Exploitation Mechanism

Attackers can exploit the vulnerability by utilizing the

STRALGO LCS

command to trigger heap corruption, which may result in the execution of malicious remote code.

Mitigation and Prevention

This section outlines the steps that organizations and users can take to mitigate the risk posed by CVE-2021-29477.

Immediate Steps to Take

Immediately update affected Redis instances to version 6.2.3 or 6.0.13 to patch the vulnerability. Additionally, consider restricting access to the

STRALGO LCS

command using ACL configurations.

Long-Term Security Practices

Implement secure coding practices, conduct regular security audits, and stay informed about vulnerabilities in Redis to prevent future exploits.

Patching and Updates

Regularly apply security patches provided by Redis to address known vulnerabilities and protect your systems from potential attacks.