CVE-2023-47235 : What You Need to Know

An issue was discovered in FRRouting FRR through 9.0.1 where a crash can occur due to a malformed BGP UPDATE message with an EOR that does not lead to a treat-as-withdraw outcome.

Understanding CVE-2023-47235

This CVE highlights a vulnerability in FRRouting FRR through version 9.0.1 that can result in a crash when processing a specific type of BGP UPDATE message.

What is CVE-2023-47235?

CVE-2023-47235 is a vulnerability in FRRouting FRR through version 9.0.1 that can be exploited by a malformed BGP UPDATE message with an EOR, leading to a crash due to incorrect processing.

The Impact of CVE-2023-47235

The presence of this vulnerability can potentially result in service disruptions or denial of service if exploited, causing instability in affected systems.

Technical Details of CVE-2023-47235

This section provides further technical insights into the vulnerability.

Vulnerability Description

The vulnerability arises from processing malformed BGP UPDATE messages with an EOR in FRRouting FRR versions up to 9.0.1, resulting in a crash instead of the expected outcome.

Affected Systems and Versions

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

Exploitation Mechanism

By sending a specially crafted BGP UPDATE message with an EOR, an attacker can trigger the crash in the affected systems, potentially causing service disruptions.

Mitigation and Prevention

It is crucial to implement necessary measures to mitigate the risks associated with CVE-2023-47235.

Immediate Steps to Take

Update FRRouting to a non-vulnerable version or apply available patches to address the issue.
Monitor network traffic for any signs of exploitation.

Long-Term Security Practices

Regularly update and patch networking equipment to protect against known vulnerabilities.
Implement network segmentation and access control measures to limit the impact of potential attacks.

Patching and Updates

Stay informed about security updates released by FRRouting and promptly apply patches to ensure the security of your network infrastructure.