CVE-2019-10155 : What You Need to Know

Libreswan Project versions prior to 3.29 have a vulnerability in processing IKEv1 informational exchange packets, potentially leading to security risks.

Understanding CVE-2019-10155

Versions before 3.29 of the Libreswan Project are susceptible to a security flaw during the handling of encrypted and integrity-protected IKEv1 informational exchange packets.

What is CVE-2019-10155?

The vulnerability in CVE-2019-10155 occurs when the receiver fails to verify the integrity check value of IKEv1 informational exchange packets, creating a security risk.

The Impact of CVE-2019-10155

CVSS Base Score: 3.1 (Low Severity)
Attack Complexity: High
Attack Vector: Network
Availability Impact: Low
Confidentiality Impact: None
Integrity Impact: None
Privileges Required: Low
User Interaction: None
Scope: Unchanged

Technical Details of CVE-2019-10155

Libreswan Project versions prior to 3.29 are affected by this vulnerability.

Vulnerability Description

The flaw arises during the processing of encrypted and integrity-protected IKEv1 informational exchange packets, where the receiver fails to verify the integrity check value.

Affected Systems and Versions

Affected Product: Libreswan
Vendor: The Libreswan Project
Affected Version: 3.29

Exploitation Mechanism

The vulnerability can be exploited by sending specially crafted IKEv1 informational exchange packets to the target system.

Mitigation and Prevention

It is crucial to take immediate steps to address and prevent exploitation of this vulnerability.

Immediate Steps to Take

Update Libreswan to version 3.29 or later to mitigate the vulnerability.
Monitor network traffic for any signs of exploitation.

Long-Term Security Practices

Regularly update and patch software to prevent known vulnerabilities.
Implement network segmentation and access controls to limit exposure to potential attacks.

Patching and Updates

Stay informed about security advisories and updates from the Libreswan Project and relevant vendors.