int ssl_security_cert(SSL *s, SSL_CTX *ctx, X509 *x, int vfy, int is_ee)
{
    if (vfy)
        vfy = SSL_SECOP_PEER;
    if (is_ee) {
        if (!ssl_security_cert_key(s, ctx, x, SSL_SECOP_EE_KEY | vfy))
            return SSL_R_EE_KEY_TOO_SMALL;
    } else {
        if (!ssl_security_cert_key(s, ctx, x, SSL_SECOP_CA_KEY | vfy))
            return SSL_R_CA_KEY_TOO_SMALL;
    }
    if (!ssl_security_cert_sig(s, ctx, x, SSL_SECOP_CA_MD | vfy))
        return SSL_R_CA_MD_TOO_WEAK;
    return 1;
}

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.