CVE-2023-30570 : What You Need to Know

This article provides detailed information about CVE-2023-30570, including its description, impact, technical details, and mitigation steps.

Understanding CVE-2023-30570

CVE-2023-30570 is a vulnerability in Pluto in Libreswan before version 4.11, allowing a denial of service via unauthenticated IKEv1 Aggressive Mode packets.

What is CVE-2023-30570?

CVE-2023-30570 in Libreswan before 4.11 allows a denial of service (responder SPI mishandling and daemon crash) via unauthenticated IKEv1 Aggressive Mode packets. The earliest affected version is 3.28.

The Impact of CVE-2023-30570

The vulnerability can lead to a denial of service by crashing the daemon through unauthenticated IKEv1 Aggressive Mode packets.

Technical Details of CVE-2023-30570

Vulnerability Description

The vulnerability arises from responder SPI mishandling in Pluto in Libreswan before version 4.11, enabling an attacker to crash the daemon.

Affected Systems and Versions

All versions of Libreswan before 4.11 are affected, with the earliest known affected version being 3.28.

Exploitation Mechanism

The vulnerability can be exploited by sending unauthenticated IKEv1 Aggressive Mode packets to the targeted system, causing a denial of service.

Mitigation and Prevention

Immediate Steps to Take

Users are advised to upgrade Libreswan to version 4.11 or later to mitigate the vulnerability. Ensure that IKEv1 Aggressive Mode packets are properly authenticated to prevent exploitation.

Long-Term Security Practices

Regularly update and patch your systems to stay protected against known vulnerabilities. Implement strong authentication mechanisms to prevent unauthorized access.

Patching and Updates

Stay informed about security updates for Libreswan and apply patches promptly to address any security flaws.