Code: static RSA_PSS_PARAMS *rsa_pss_decode(const X509_ALGOR *alg,
                                      X509_ALGOR **pmaskHash)
{
    const unsigned char *p;
    int plen;
    RSA_PSS_PARAMS *pss;

    *pmaskHash = NULL;

    if (!alg->parameter || alg->parameter->type != V_ASN1_SEQUENCE)
        return NULL;
    p = alg->parameter->value.sequence->data;
    plen = alg->parameter->value.sequence->length;
    pss = d2i_RSA_PSS_PARAMS(NULL, &p, plen);

    if (!pss)
        return NULL;

     if (pss->maskGenAlgorithm) {
         ASN1_TYPE *param = pss->maskGenAlgorithm->parameter;
         if (OBJ_obj2nid(pss->maskGenAlgorithm->algorithm) == NID_mgf1
            && param->type == V_ASN1_SEQUENCE) {
             p = param->value.sequence->data;
             plen = param->value.sequence->length;
             *pmaskHash = d2i_X509_ALGOR(NULL, &p, plen);
        }
    }

    return pss;
}

Vulnerability Type: DoS
CWE ID: 
Summary: crypto/rsa/rsa_ameth.c in OpenSSL 1.0.1 before 1.0.1q and 1.0.2 before 1.0.2e allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via an RSA PSS ASN.1 signature that lacks a mask generation function parameter.
Commit Message: 