CVE-2023-22458 : Security Advisory and Response

This CVE involves an integer overflow in multiple Redis commands that can lead to a denial-of-service attack.

Understanding CVE-2023-22458

This vulnerability in Redis, an in-memory database that persists on disk, can be triggered by authenticated users issuing specific commands with specially crafted arguments, resulting in a denial-of-service by crashing Redis with an assertion failure.

What is CVE-2023-22458?

CVE-2023-22458 involves an integer overflow in Redis commands

HRANDFIELD

or

ZRANDMEMBER

that can be exploited by authenticated users to crash Redis, causing a denial-of-service situation. This vulnerability affects Redis versions 6.2 or newer up to but not including 6.2.9, as well as versions 7.0 up to but not including 7.0.8.

The Impact of CVE-2023-22458

The impact of this vulnerability is categorized as "MEDIUM" severity with a CVSS base score of 5.5. The potential threat lies in the high availability impact it poses, while the confidentiality and integrity impacts are deemed as none.

Technical Details of CVE-2023-22458

This section will cover the vulnerability description, affected systems and versions, as well as the exploitation mechanism associated with CVE-2023-22458.

Vulnerability Description

The vulnerability stems from an integer overflow in Redis commands

HRANDFIELD

or

ZRANDMEMBER

, allowing authenticated users to trigger a denial-of-service attack by crashing Redis with an assertion failure.

Affected Systems and Versions

The impacted systems include Redis versions 6.2 or newer up to version 6.2.9 (exclusive), as well as versions 7.0 up to version 7.0.8 (exclusive).

Exploitation Mechanism

To exploit this vulnerability, authenticated users can issue the problematic Redis commands with specially crafted arguments, leading to a crash in Redis and subsequent denial-of-service.

Mitigation and Prevention

In order to address CVE-2023-22458 and prevent potential exploitation, users are recommended to take immediate steps, adopt long-term security practices, and ensure proper patching and updates.

Immediate Steps to Take

Users are advised to upgrade their Redis installations to versions that include the necessary patches to mitigate the vulnerability. As there are no known workarounds for this issue, upgrading to secure versions is crucial.

Long-Term Security Practices

It is essential for organizations to implement robust security practices, including regular security audits, threat assessments, and timely software updates to mitigate the risk of similar vulnerabilities in the future.

Patching and Updates

To address CVE-2023-22458, users should update their Redis installations to version 6.2.9 or higher (if using versions 6.2 or newer) and version 7.0.8 or higher (if using versions 7.0). Regularly monitoring for security advisories and promptly applying patches is key to maintaining a secure Redis environment.