CVE-2019-1547 : Vulnerability Insights and Analysis

OpenSSL vulnerability affecting versions 1.1.1-1.1.1c, 1.1.0-1.1.0k, and 1.0.2-1.0.2s fixed in versions 1.1.1d, 1.1.0l, and 1.0.2t.

Understanding CVE-2019-1547

This CVE involves a timing side channel attack on ECDSA in OpenSSL.

What is CVE-2019-1547?

OpenSSL EC groups may lack a co-factor, leading to non-side channel resistant code paths
Attackers could exploit this to recover keys during an ECDSA signature operation

The Impact of CVE-2019-1547

Low severity vulnerability
Potential for complete key recovery during ECDSA signature operation

Technical Details of CVE-2019-1547

This section provides more in-depth technical information about the vulnerability.

Vulnerability Description

OpenSSL EC groups without a co-factor can lead to non-side channel resistant code paths
Attackers could exploit this to recover keys during ECDSA signature operation

Affected Systems and Versions

OpenSSL versions 1.1.1-1.1.1c, 1.1.0-1.1.0k, and 1.0.2-1.0.2s

Exploitation Mechanism

Attackers can time the creation of numerous signatures to exploit the vulnerability

Mitigation and Prevention

Steps to address and prevent the CVE-2019-1547 vulnerability.

Immediate Steps to Take

Update OpenSSL to versions 1.1.1d, 1.1.0l, or 1.0.2t
Monitor for any unusual signature creation activities

Long-Term Security Practices

Regularly update OpenSSL and other security software
Implement secure coding practices to minimize vulnerabilities

Patching and Updates

Apply patches provided by OpenSSL to fix the vulnerability