Cryptography / SSL Certificate Signed Using Weak Hashing Algorithm
SSL Certificate Signed Using Weak Hashing Algorithm is a vulnerability associated with the cryptographic algorithm used to sign the SSL certificate. This vulnerability is categorized as CWE-327, which is defined as “the use of a weak cryptographic algorithm or its parameters for protecting sensitive data” (CWE, 2020). This specific vulnerability is related to the use of a weak hashing algorithm to sign an SSL certificate. As a result, the certificate is less secure and can be more easily compromised (OWASP Testing Guide, 2020).
This vulnerability poses a significant risk to IT infrastructure as it can be used to compromise the security of the SSL certificate. Attackers can exploit the weak hashing algorithm to gain access to sensitive data or to launch malicious attacks on the system (OWASP Testing Guide, 2020). As a result, the system may be vulnerable to malicious attacks, data leakage, and other security incidents.
The most effective solution to this vulnerability is to use a stronger algorithm to sign the SSL certificate. Specifically, SSL certificates should be signed with a SHA-2 algorithm, which is more secure than the SHA-1 algorithm (OWASP Testing Guide, 2020). Additionally, the system should be regularly monitored for any signs of potential security incidents such as suspicious activity, data leakage, or malicious attacks.
The following example code illustrates the use of a weak hashing algorithm to sign an SSL certificate.
openssl req -new -newkey rsa:2048 -nodes -keyout server.key -out server.csr openssl x509 -req -days 365 -in server.csr -signkey server.key -sha1
In the code above, the command “sha1” is used to sign the SSL certificate using the SHA-1 algorithm. This is an example of a weak hashing algorithm and should be avoided in order to protect the SSL certificate from being compromised (OWASP Testing Guide, 2020).