CVE-2023-46753 : Security Advisory and Response

An issue was discovered in FRRouting FRR through 9.0.1 where a crash can occur for a crafted BGP UPDATE message without mandatory attributes.

Understanding CVE-2023-46753

This section will provide insight into the details of CVE-2023-46753.

What is CVE-2023-46753?

CVE-2023-46753 is a vulnerability found in FRRouting FRR through version 9.0.1 that can lead to a crash when a specific type of BGP UPDATE message is received lacking mandatory attributes.

The Impact of CVE-2023-46753

This vulnerability could be exploited by an attacker to cause a denial of service (DoS) condition on the affected system, leading to potential service disruption.

Technical Details of CVE-2023-46753

In this section, we will delve into the technical aspects of CVE-2023-46753.

Vulnerability Description

The vulnerability allows for a crash when a crafted BGP UPDATE message without mandatory attributes is processed by FRRouting FRR.

Affected Systems and Versions

All versions of FRRouting FRR up to and including 9.0.1 are affected by this vulnerability.

Exploitation Mechanism

An attacker can exploit this vulnerability by sending a specially crafted BGP UPDATE message lacking mandatory attributes to the target system, triggering a crash.

Mitigation and Prevention

To protect systems from CVE-2023-46753, it is crucial to follow appropriate mitigation strategies.

Immediate Steps to Take

Apply the patch provided by the vendor to address the vulnerability.
Monitor network traffic for any suspicious BGP UPDATE messages.

Long-Term Security Practices

Regularly update FRRouting FRR to the latest version to ensure vulnerabilities are patched.
Implement network segmentation to limit the impact of potential attacks.

Patching and Updates

Stay informed about security updates and patches released by FRRouting FRR to promptly address any new vulnerabilities.