CVE-2022-35951 Explained : Impact and Mitigation

A critical vulnerability has been identified in Redis versions 7.0.0 and above, prior to 7.0.5, that could allow an attacker to execute remote code via a heap overflow. This CVE has been assigned a CVSS base score of 7, indicating a high severity level.

Understanding CVE-2022-35951

This section will delve into the details of the CVE-2022-35951 vulnerability, its impact, technical description, affected systems, and mitigation strategies.

What is CVE-2022-35951?

Redis, an in-memory database that persists on disk, is susceptible to an Integer Overflow leading to a remote code execution via a heap overflow. By executing a specific command on a stream key with a crafted argument, an attacker can trigger this vulnerability.

The Impact of CVE-2022-35951

The vulnerability in Redis versions 7.0.0 to 7.0.4 could result in a chain of events starting from an integer overflow to a heap overflow, potentially enabling an attacker to execute remote code on the target system.

Technical Details of CVE-2022-35951

Let's explore the technical aspects of the CVE-2022-35951 vulnerability.

Vulnerability Description

The CVE is due to an Integer Overflow in Redis versions 7.0.0 to 7.0.4, which could be exploited to achieve remote code execution via a heap overflow.

Affected Systems and Versions

Vendor: Redis
Affected Product: Redis
Vulnerable Versions: >= 7.0.0, < 7.0.5

Exploitation Mechanism

The exploitation involves executing a specially crafted

XAUTOCLAIM

command on a stream key with a manipulated

COUNT

argument, causing the integer overflow and subsequent heap overflow.

Mitigation and Prevention

Protecting systems from CVE-2022-35951 requires immediate actions and long-term security measures.

Immediate Steps to Take

Update Redis to version 7.0.5 or above, where the vulnerability has been patched.
Monitor network traffic for any suspicious activities that could indicate an ongoing exploit attempt.

Long-Term Security Practices

Regularly apply security patches and updates to all software components in your environment.
Implement strong access controls and authentication mechanisms to prevent unauthorized access.

Patching and Updates

Refer to the relevant advisories and follow the recommendations provided by Redis and other security organizations.