CVE-2022-0778 : Security Advisory and Response
Discover the impact of CVE-2022-0778, an OpenSSL vulnerability allowing infinite loops in BN_mod_sqrt() when parsing certificates. Learn mitigation strategies and affected versions.
A detailed analysis of CVE-2022-0778, a vulnerability in OpenSSL that allows for an infinite loop in BN_mod_sqrt() when parsing certificates.
Understanding CVE-2022-0778
This section delves into the impact, technical details, and mitigation strategies related to CVE-2022-0778.
What is CVE-2022-0778?
The BN_mod_sqrt() function in OpenSSL has a bug that can result in an infinite loop for non-prime moduli, affecting certificate parsing and leading to denial of service attacks.
The Impact of CVE-2022-0778
Crafted certificates with invalid explicit curve parameters can trigger an infinite loop, affecting TLS clients, servers, hosting providers, and certificate authorities. OpenSSL versions 1.0.2, 1.1.1, and 3.0 are vulnerable.
Technical Details of CVE-2022-0778
This section covers vulnerability description, affected systems and versions, and exploitation mechanisms related to CVE-2022-0778.
Vulnerability Description
The BN_mod_sqrt() function in OpenSSL can lead to an infinite loop when parsing certificates with elliptic curve public keys in compressed form or explicit elliptic curve parameters.
Affected Systems and Versions
OpenSSL versions 1.0.2, 1.1.1, and 3.0 are impacted. Fixed in 1.1.1n and 3.0.2 released on 15th March 2022.
Exploitation Mechanism
Crafted certificates or private keys with invalid explicit elliptic curve parameters can exploit this vulnerability, resulting in denial of service attacks.
Mitigation and Prevention
Learn about immediate steps to take, long-term security practices, and the importance of patching and updates.
Immediate Steps to Take
Organizations should update OpenSSL to the latest patched versions (1.1.1n, 3.0.2) to mitigate the vulnerability.
Long-Term Security Practices
Implement secure coding practices, regularly update cryptographic libraries, and conduct security audits to prevent similar issues.
Patching and Updates
Stay informed about security advisories and apply patches promptly to address known vulnerabilities.