CVE-2018-12439 : Exploit Details and Defense Strategies

MatrixSSL up to version 3.9.5 Open is susceptible to a memory-cache side-channel attack on ECDSA signatures known as ROHNP. Attackers can exploit this vulnerability to retrieve an ECDSA key by gaining access to the local machine or a virtual machine on the same physical host.

Understanding CVE-2018-12439

MatrixSSL through version 3.9.5 Open is affected by a memory-cache side-channel attack on ECDSA signatures, also referred to as ROHNP.

What is CVE-2018-12439?

This CVE identifies a vulnerability in MatrixSSL that allows attackers to perform a memory-cache side-channel attack on ECDSA signatures, enabling them to retrieve an ECDSA key with access to the local or a virtual machine on the same physical host.

The Impact of CVE-2018-12439

The vulnerability poses a security risk as it can be exploited by malicious actors to compromise ECDSA keys, potentially leading to unauthorized access and data breaches.

Technical Details of CVE-2018-12439

MatrixSSL version 3.9.5 Open is affected by the following:

Vulnerability Description

The vulnerability allows for a memory-cache side-channel attack on ECDSA signatures, known as ROHNP, which can be exploited to retrieve ECDSA keys.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Versions: Up to 3.9.5 Open

Exploitation Mechanism

To exploit this vulnerability, attackers need access to either the local machine or a separate virtual machine on the same physical host.

Mitigation and Prevention

It is crucial to take immediate steps to address and prevent the exploitation of CVE-2018-12439:

Immediate Steps to Take

Update MatrixSSL to a patched version that addresses the vulnerability.
Implement access controls to restrict unauthorized access to sensitive systems.

Long-Term Security Practices

Regularly monitor and audit system activity to detect any suspicious behavior.
Educate users and administrators about secure practices to mitigate potential risks.

Patching and Updates

Stay informed about security updates and patches released by MatrixSSL.
Apply patches promptly to ensure that systems are protected against known vulnerabilities.