CVE-2018-12433 : Security Advisory and Response

Cryptlib through version 3.4.4 is vulnerable to a memory-cache side-channel attack known as Return Of the Hidden Number Problem (ROHNP). This vulnerability allows attackers to potentially extract key information from DSA and ECDSA signatures.

Understanding CVE-2018-12433

The memory-cache side-channel attack in cryptlib up to version 3.4.4 poses a security risk by enabling unauthorized access to key information.

What is CVE-2018-12433?

The vulnerability in cryptlib allows attackers to exploit a memory-cache side-channel attack to retrieve key data from DSA and ECDSA signatures. Access to the local machine or a virtual machine on the same physical host is required for exploitation.

The Impact of CVE-2018-12433

This vulnerability could lead to the unauthorized extraction of key information from cryptographic signatures, compromising the security and integrity of the affected systems.

Technical Details of CVE-2018-12433

Cryptlib's vulnerability to memory-cache side-channel attacks has the following technical implications:

Vulnerability Description

The vulnerability allows attackers to extract key information from DSA and ECDSA signatures.

Affected Systems and Versions

Cryptlib up to version 3.4.4 is affected by this vulnerability.

Exploitation Mechanism

Attackers can exploit this vulnerability by conducting a memory-cache side-channel attack to retrieve key data from cryptographic signatures.

Mitigation and Prevention

To address CVE-2018-12433, consider the following mitigation strategies:

Immediate Steps to Take

Update cryptlib to a patched version that addresses the memory-cache side-channel vulnerability.
Implement access controls to limit unauthorized access to sensitive cryptographic operations.

Long-Term Security Practices

Regularly monitor and audit cryptographic operations for any unusual activities that may indicate a breach.
Educate users and administrators about the risks of side-channel attacks and the importance of securing cryptographic keys.

Patching and Updates

Stay informed about security updates and patches released by the vendor to address vulnerabilities like the memory-cache side-channel attack in cryptlib.