Server Certificate Validation Through OCSP Stapling

SSL Certificates are data files that bind a cryptographic key. There are servers that uses vulnerable versions of openSSL. This may lead to OCSP stapling vulnerability. The old versions of OpenSSL allow remote attackers to successfully attempt a denial of service. The attacker can also possibly get sensitive information in a web application. This can be done by using a vulnerable/improper ClientHello handshake message. This message will trigger out-of-bounds memory access.

Impact

The impact include:-

• Denial of service
• OCSP Stapling

Mitigation / Precaution

This vulnerability can be fixed by:-

• Updating the OpenSSL to Latest version
• Upgrading the version
• If it is not immediately possible, patch the source code for OCSP Stapling

Written by

Jijith Rajan

Cyber Security Engineer

His passion for staying abreast of the latest security threats and trends, coupled with his hands-on experience, allows him to actively contribute to the protection of digital assets. Jijith's dedication and enthusiasm make him a promising talent in the ever-evolving realm of cybersecurity, promising a safer digital future.