CVE-2017-8855 : What You Need to Know

wolfSSL before version 3.11.0 is vulnerable to a flaw that allows the wc_DhAgree function to accept a malformed DH key.

Understanding CVE-2017-8855

This CVE identifies a security vulnerability in wolfSSL versions prior to 3.11.0.

What is CVE-2017-8855?

Prior to version 3.11.0, wolfSSL lacks measures to prevent the wc_DhAgree function from accepting a defective DH key.

The Impact of CVE-2017-8855

This vulnerability could allow attackers to exploit the flawed DH key acceptance, potentially leading to security breaches or unauthorized access.

Technical Details of CVE-2017-8855

wolfSSL's vulnerability in version 3.11.0 is detailed below:

Vulnerability Description

wolfSSL before 3.11.0 does not prevent wc_DhAgree from accepting a malformed DH key.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Versions affected: Not applicable

Exploitation Mechanism

The vulnerability arises from the wc_DhAgree function's inability to reject a defective DH key, opening the door for potential exploitation.

Mitigation and Prevention

Protect your systems from CVE-2017-8855 with the following steps:

Immediate Steps to Take

Upgrade wolfSSL to version 3.11.0 or newer to mitigate the vulnerability.
Monitor for any unusual activities that could indicate exploitation of the flaw.

Long-Term Security Practices

Regularly update and patch software to address known vulnerabilities.
Implement secure coding practices to prevent similar issues in the future.

Patching and Updates

Ensure timely application of security patches and updates to keep systems protected.