Fix several crash causing defects from OpenSSL.

These include:
CVE-2015-0209 - Use After Free following d2i_ECPrivatekey error
CVE-2015-0286 - Segmentation fault in ASN1_TYPE_cmp
CVE-2015-0287 - ASN.1 structure reuse memory corruption
CVE-2015-0288 - X509_to_X509_REQ NULL pointer deref
CVE-2015-0289 - PKCS7 NULL pointer dereferences

Several other issues did not apply or were already fixed.
Refer to https://www.openssl.org/news/secadv_20150319.txt

joint work with beck, doug, guenther, jsing, miod

13 files changed, 166 insertions, 65 deletions

diff --git a/src/lib/libssl/src/crypto/asn1/a_int.c b/src/lib/libssl/src/crypto/asn1/a_int.c
index ba2895db6b..7e2ab3d25d 100644
--- a/src/lib/libssl/src/crypto/asn1/a_int.c
+++ b/src/lib/libssl/src/crypto/asn1/a_int.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: a_int.c,v 1.24 2014/07/11 08:44:47 jsing Exp $ */
+/* $OpenBSD: a_int.c,v 1.24.4.1 2015/03/19 14:02:22 tedu Exp $ */
 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
@@ -268,7 +268,7 @@ c2i_ASN1_INTEGER(ASN1_INTEGER **a, const unsigned char **pp, long len)
 
 err:
         ASN1err(ASN1_F_C2I_ASN1_INTEGER, i);
-        if ((ret != NULL) && ((a == NULL) || (*a != ret)))
+        if (a == NULL || *a != ret)
                 M_ASN1_INTEGER_free(ret);
         return (NULL);
 }
@@ -335,7 +335,7 @@ d2i_ASN1_UINTEGER(ASN1_INTEGER **a, const unsigned char **pp, long length)
 
 err:
         ASN1err(ASN1_F_D2I_ASN1_UINTEGER, i);
-        if ((ret != NULL) && ((a == NULL) || (*a != ret)))
+        if (a == NULL || *a != ret)
                 M_ASN1_INTEGER_free(ret);
         return (NULL);
 }
diff --git a/src/lib/libssl/src/crypto/asn1/a_set.c b/src/lib/libssl/src/crypto/asn1/a_set.c
index ba4f28be34..7513eaa570 100644
--- a/src/lib/libssl/src/crypto/asn1/a_set.c
+++ b/src/lib/libssl/src/crypto/asn1/a_set.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: a_set.c,v 1.16 2014/07/11 08:44:47 jsing Exp $ */
+/* $OpenBSD: a_set.c,v 1.16.4.1 2015/03/19 14:02:22 tedu Exp $ */
 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
@@ -225,7 +225,7 @@ d2i_ASN1_SET(STACK_OF(OPENSSL_BLOCK) **a, const unsigned char **pp, long length,
         return ret;
 
 err:
-        if (ret != NULL && (a == NULL || *a != ret)) {
+        if (a == NULL || *a != ret) {
                 if (free_func != NULL)
                         sk_OPENSSL_BLOCK_pop_free(ret, free_func);
                 else
diff --git a/src/lib/libssl/src/crypto/asn1/a_type.c b/src/lib/libssl/src/crypto/asn1/a_type.c
index add5ff1253..73c7a98e65 100644
--- a/src/lib/libssl/src/crypto/asn1/a_type.c
+++ b/src/lib/libssl/src/crypto/asn1/a_type.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: a_type.c,v 1.14 2014/07/11 08:44:47 jsing Exp $ */
+/* $OpenBSD: a_type.c,v 1.14.4.1 2015/03/19 14:02:22 tedu Exp $ */
 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
@@ -122,7 +122,9 @@ ASN1_TYPE_cmp(ASN1_TYPE *a, ASN1_TYPE *b)
         case V_ASN1_OBJECT:
                 result = OBJ_cmp(a->value.object, b->value.object);
                 break;
-
+        case V_ASN1_BOOLEAN:
+                result = a->value.boolean - b->value.boolean;
+                break;
         case V_ASN1_NULL:
                 result = 0;     /* They do not have content. */
                 break;
diff --git a/src/lib/libssl/src/crypto/asn1/d2i_pr.c b/src/lib/libssl/src/crypto/asn1/d2i_pr.c
index 2deec613ed..3556346ed6 100644
--- a/src/lib/libssl/src/crypto/asn1/d2i_pr.c
+++ b/src/lib/libssl/src/crypto/asn1/d2i_pr.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: d2i_pr.c,v 1.12 2014/07/11 08:44:47 jsing Exp $ */
+/* $OpenBSD: d2i_pr.c,v 1.12.4.1 2015/03/19 14:02:22 tedu Exp $ */
 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
@@ -117,7 +117,7 @@ d2i_PrivateKey(int type, EVP_PKEY **a, const unsigned char **pp, long length)
         return (ret);
 
 err:
-        if ((ret != NULL) && ((a == NULL) || (*a != ret)))
+        if (a == NULL || *a != ret)
                 EVP_PKEY_free(ret);
         return (NULL);
 }
diff --git a/src/lib/libssl/src/crypto/asn1/d2i_pu.c b/src/lib/libssl/src/crypto/asn1/d2i_pu.c
index df6fea4af5..2736189393 100644
--- a/src/lib/libssl/src/crypto/asn1/d2i_pu.c
+++ b/src/lib/libssl/src/crypto/asn1/d2i_pu.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: d2i_pu.c,v 1.12 2014/07/11 08:44:47 jsing Exp $ */
+/* $OpenBSD: d2i_pu.c,v 1.12.4.1 2015/03/19 14:02:22 tedu Exp $ */
 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
@@ -130,7 +130,7 @@ d2i_PublicKey(int type, EVP_PKEY **a, const unsigned char **pp, long length)
         return (ret);
 
 err:
-        if ((ret != NULL) && ((a == NULL) || (*a != ret)))
+        if (a == NULL || *a != ret)
                 EVP_PKEY_free(ret);
         return (NULL);
 }
diff --git a/src/lib/libssl/src/crypto/asn1/n_pkey.c b/src/lib/libssl/src/crypto/asn1/n_pkey.c
index 42431b6e24..e8968b5c16 100644
--- a/src/lib/libssl/src/crypto/asn1/n_pkey.c
+++ b/src/lib/libssl/src/crypto/asn1/n_pkey.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: n_pkey.c,v 1.22 2014/07/12 22:26:01 miod Exp $ */
+/* $OpenBSD: n_pkey.c,v 1.22.4.1 2015/03/19 14:02:22 tedu Exp $ */
 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
@@ -250,11 +250,11 @@ d2i_RSA_NET(RSA **a, const unsigned char **pp, long length,
                 return NULL;
         }
 
-        if ((enckey->os->length != 11) || (strncmp("private-key",
-        (char *)enckey->os->data, 11) != 0)) {
+        /* XXX 11 == strlen("private-key") */
+        if (enckey->os->length != 11 ||
+            memcmp("private-key", enckey->os->data, 11) != 0) {
                 ASN1err(ASN1_F_D2I_RSA_NET, ASN1_R_PRIVATE_KEY_HEADER_MISSING);
-                NETSCAPE_ENCRYPTED_PKEY_free(enckey);
-                return NULL;
+                goto err;
         }
         if (OBJ_obj2nid(enckey->enckey->algor->algorithm) != NID_rc4) {
                 ASN1err(ASN1_F_D2I_RSA_NET,
diff --git a/src/lib/libssl/src/crypto/asn1/tasn_dec.c b/src/lib/libssl/src/crypto/asn1/tasn_dec.c
index f633d03e9c..16b36359a2 100644
--- a/src/lib/libssl/src/crypto/asn1/tasn_dec.c
+++ b/src/lib/libssl/src/crypto/asn1/tasn_dec.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: tasn_dec.c,v 1.24 2014/06/12 15:49:27 deraadt Exp $ */
+/* $OpenBSD: tasn_dec.c,v 1.24.4.1 2015/03/19 14:02:22 tedu Exp $ */
 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
  * project 2000.
  */
@@ -304,8 +304,16 @@ ASN1_item_ex_d2i(ASN1_VALUE **pval, const unsigned char **in, long len,
                 if (asn1_cb && !asn1_cb(ASN1_OP_D2I_PRE, pval, it, NULL))
                         goto auxerr;
 
-                /* Allocate structure */
-                if (!*pval && !ASN1_item_ex_new(pval, it)) {
+                if (*pval) {
+                        /* Free up and zero CHOICE value if initialised */
+                        i = asn1_get_choice_selector(pval, it);
+                        if ((i >= 0) && (i < it->tcount)) {
+                                tt = it->templates + i;
+                                pchptr = asn1_get_field_ptr(pval, tt);
+                                ASN1_template_free(pchptr, tt);
+                                asn1_set_choice_selector(pval, -1, it);
+                        }
+                } else if (!ASN1_item_ex_new(pval, it)) {
                         ASN1err(ASN1_F_ASN1_ITEM_EX_D2I,
                             ERR_R_NESTED_ASN1_ERROR);
                         goto err;
@@ -391,6 +399,19 @@ ASN1_item_ex_d2i(ASN1_VALUE **pval, const unsigned char **in, long len,
                 if (asn1_cb && !asn1_cb(ASN1_OP_D2I_PRE, pval, it, NULL))
                         goto auxerr;
 
+                /* Free up and zero any ADB found */
+                for (i = 0, tt = it->templates; i < it->tcount; i++, tt++) {
+                        if (tt->flags & ASN1_TFLG_ADB_MASK) {
+                                const ASN1_TEMPLATE *seqtt;
+                                ASN1_VALUE **pseqval;
+                                seqtt = asn1_do_adb(pval, tt, 1);
+                                if (!seqtt)
+                                        goto err;
+                                pseqval = asn1_get_field_ptr(pval, seqtt);
+                                ASN1_template_free(pseqval, seqtt);
+                        }
+                }
+
                 /* Get each field entry */
                 for (i = 0, tt = it->templates; i < it->tcount; i++, tt++) {
                         const ASN1_TEMPLATE *seqtt;
diff --git a/src/lib/libssl/src/crypto/asn1/x_x509.c b/src/lib/libssl/src/crypto/asn1/x_x509.c
index 0236a0faa2..83d1b317fe 100644
--- a/src/lib/libssl/src/crypto/asn1/x_x509.c
+++ b/src/lib/libssl/src/crypto/asn1/x_x509.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: x_x509.c,v 1.17 2014/07/11 08:44:47 jsing Exp $ */
+/* $OpenBSD: x_x509.c,v 1.17.4.1 2015/03/19 14:02:22 tedu Exp $ */
 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
@@ -177,16 +177,20 @@ d2i_X509_AUX(X509 **a, const unsigned char **pp, long length)
 
         /* Save start position */
         q = *pp;
-        ret = d2i_X509(a, pp, length);
+        ret = d2i_X509(NULL, pp, length);
         /* If certificate unreadable then forget it */
         if (!ret)
                 return NULL;
         /* update length */
         length -= *pp - q;
-        if (!length)
-                return ret;
-        if (!d2i_X509_CERT_AUX(&ret->aux, pp, length))
-                goto err;
+        if (length > 0) {
+                if (!d2i_X509_CERT_AUX(&ret->aux, pp, length))
+                        goto err;
+        }
+        if (a != NULL) {
+                X509_free(*a);
+                *a = ret;
+        }
         return ret;
 
 err:
diff --git a/src/lib/libssl/src/crypto/ec/ec_asn1.c b/src/lib/libssl/src/crypto/ec/ec_asn1.c
index c54f6593d5..d0047436fe 100644
--- a/src/lib/libssl/src/crypto/ec/ec_asn1.c
+++ b/src/lib/libssl/src/crypto/ec/ec_asn1.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: ec_asn1.c,v 1.10 2014/07/12 16:03:37 miod Exp $ */
+/* $OpenBSD: ec_asn1.c,v 1.10.4.1 2015/03/19 14:02:22 tedu Exp $ */
 /*
  * Written by Nils Larsch for the OpenSSL project.
  */
@@ -918,19 +918,19 @@ d2i_ECPKParameters(EC_GROUP ** a, const unsigned char **in, long len)
 
         if ((params = d2i_ECPKPARAMETERS(NULL, in, len)) == NULL) {
                 ECerr(EC_F_D2I_ECPKPARAMETERS, EC_R_D2I_ECPKPARAMETERS_FAILURE);
-                ECPKPARAMETERS_free(params);
-                return NULL;
+                goto err;
         }
         if ((group = ec_asn1_pkparameters2group(params)) == NULL) {
                 ECerr(EC_F_D2I_ECPKPARAMETERS, EC_R_PKPARAMETERS2GROUP_FAILURE);
-                ECPKPARAMETERS_free(params);
-                return NULL;
+                goto err;
         }
-        if (a && *a)
+
+        if (a != NULL) {
                 EC_GROUP_clear_free(*a);
-        if (a)
                 *a = group;
+        }
 
+err:
         ECPKPARAMETERS_free(params);
         return (group);
 }
@@ -958,7 +958,6 @@ i2d_ECPKParameters(const EC_GROUP * a, unsigned char **out)
 EC_KEY *
 d2i_ECPrivateKey(EC_KEY ** a, const unsigned char **in, long len)
 {
-        int ok = 0;
         EC_KEY *ret = NULL;
         EC_PRIVATEKEY *priv_key = NULL;
 
@@ -973,12 +972,9 @@ d2i_ECPrivateKey(EC_KEY ** a, const unsigned char **in, long len)
         }
         if (a == NULL || *a == NULL) {
                 if ((ret = EC_KEY_new()) == NULL) {
-                        ECerr(EC_F_D2I_ECPRIVATEKEY,
-                            ERR_R_MALLOC_FAILURE);
+                        ECerr(EC_F_D2I_ECPRIVATEKEY, ERR_R_MALLOC_FAILURE);
                         goto err;
                 }
-                if (a)
-                        *a = ret;
         } else
                 ret = *a;
 
@@ -1028,17 +1024,19 @@ d2i_ECPrivateKey(EC_KEY ** a, const unsigned char **in, long len)
                         goto err;
                 }
         }
-        ok = 1;
+
+        EC_PRIVATEKEY_free(priv_key);
+        if (a != NULL)
+                *a = ret;
+        return (ret);
+
 err:
-        if (!ok) {
-                if (ret)
-                        EC_KEY_free(ret);
-                ret = NULL;
-        }
+        if (a == NULL || *a != ret)
+                EC_KEY_free(ret);
         if (priv_key)
                 EC_PRIVATEKEY_free(priv_key);
 
-        return (ret);
+        return (NULL);
 }
 
 int 
@@ -1151,8 +1149,6 @@ d2i_ECParameters(EC_KEY ** a, const unsigned char **in, long len)
                         ECerr(EC_F_D2I_ECPARAMETERS, ERR_R_MALLOC_FAILURE);
                         return NULL;
                 }
-                if (a)
-                        *a = ret;
         } else
                 ret = *a;
 
@@ -1160,6 +1156,9 @@ d2i_ECParameters(EC_KEY ** a, const unsigned char **in, long len)
                 ECerr(EC_F_D2I_ECPARAMETERS, ERR_R_EC_LIB);
                 return NULL;
         }
+
+        if (a != NULL)
+                *a = ret;
         return ret;
 }
 
diff --git a/src/lib/libssl/src/crypto/pkcs7/pk7_doit.c b/src/lib/libssl/src/crypto/pkcs7/pk7_doit.c
index 8f1e393635..442d0ec203 100644
--- a/src/lib/libssl/src/crypto/pkcs7/pk7_doit.c
+++ b/src/lib/libssl/src/crypto/pkcs7/pk7_doit.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: pk7_doit.c,v 1.29 2014/07/25 06:05:32 doug Exp $ */
+/* $OpenBSD: pk7_doit.c,v 1.29.4.1 2015/03/19 14:02:22 tedu Exp $ */
 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
@@ -261,6 +261,28 @@ PKCS7_dataInit(PKCS7 *p7, BIO *bio)
         PKCS7_RECIP_INFO *ri = NULL;
         ASN1_OCTET_STRING *os = NULL;
 
+        if (p7 == NULL) {
+                PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_INVALID_NULL_POINTER);
+                return NULL;
+        }
+
+        /*
+         * The content field in the PKCS7 ContentInfo is optional,
+         * but that really only applies to inner content (precisely,
+         * detached signatures).
+         *
+         * When reading content, missing outer content is therefore
+         * treated as an error.
+         *
+         * When creating content, PKCS7_content_new() must be called
+         * before calling this method, so a NULL p7->d is always
+         * an error.
+         */
+        if (p7->d.ptr == NULL) {
+                PKCS7err(PKCS7_F_PKCS7_DATAINIT, PKCS7_R_NO_CONTENT);
+                return NULL;
+        }
+
         i = OBJ_obj2nid(p7->type);
         p7->state = PKCS7_S_HEADER;
 
@@ -418,6 +440,17 @@ PKCS7_dataDecode(PKCS7 *p7, EVP_PKEY *pkey, BIO *in_bio, X509 *pcert)
         unsigned char *ek = NULL, *tkey = NULL;
         int eklen = 0, tkeylen = 0;
 
+        if (p7 == NULL) {
+                PKCS7err(PKCS7_F_PKCS7_DATADECODE,
+                    PKCS7_R_INVALID_NULL_POINTER);
+                return NULL;
+        }
+
+        if (p7->d.ptr == NULL) {
+                PKCS7err(PKCS7_F_PKCS7_DATADECODE, PKCS7_R_NO_CONTENT);
+                return NULL;
+        }
+
         i = OBJ_obj2nid(p7->type);
         p7->state = PKCS7_S_HEADER;
 
@@ -713,6 +746,17 @@ PKCS7_dataFinal(PKCS7 *p7, BIO *bio)
         STACK_OF(PKCS7_SIGNER_INFO) *si_sk = NULL;
         ASN1_OCTET_STRING *os = NULL;
 
+        if (p7 == NULL) {
+                PKCS7err(PKCS7_F_PKCS7_DATAFINAL,
+                    PKCS7_R_INVALID_NULL_POINTER);
+                return 0;
+        }
+
+        if (p7->d.ptr == NULL) {
+                PKCS7err(PKCS7_F_PKCS7_DATAFINAL, PKCS7_R_NO_CONTENT);
+                return 0;
+        }
+
         EVP_MD_CTX_init(&ctx_tmp);
         i = OBJ_obj2nid(p7->type);
         p7->state = PKCS7_S_HEADER;
@@ -758,6 +802,7 @@ PKCS7_dataFinal(PKCS7 *p7, BIO *bio)
                 /* If detached data then the content is excluded */
                 if (PKCS7_type_is_data(p7->d.sign->contents) && p7->detached) {
                         M_ASN1_OCTET_STRING_free(os);
+                        os = NULL;
                         p7->d.sign->contents->d.data = NULL;
                 }
                 break;
@@ -772,6 +817,7 @@ PKCS7_dataFinal(PKCS7 *p7, BIO *bio)
                 if (PKCS7_type_is_data(p7->d.digest->contents) &&
                     p7->detached) {
                         M_ASN1_OCTET_STRING_free(os);
+                        os = NULL;
                         p7->d.digest->contents->d.data = NULL;
                 }
                 break;
@@ -837,22 +883,32 @@ PKCS7_dataFinal(PKCS7 *p7, BIO *bio)
                 M_ASN1_OCTET_STRING_set(p7->d.digest->digest, md_data, md_len);
         }
 
-        if (!PKCS7_is_detached(p7) && !(os->flags & ASN1_STRING_FLAG_NDEF)) {
-                char *cont;
-                long contlen;
-                btmp = BIO_find_type(bio, BIO_TYPE_MEM);
-                if (btmp == NULL) {
-                        PKCS7err(PKCS7_F_PKCS7_DATAFINAL,
-                            PKCS7_R_UNABLE_TO_FIND_MEM_BIO);
+        if (!PKCS7_is_detached(p7)) {
+                /*
+                 * NOTE: only reach os == NULL here because detached
+                 * digested data support is broken?
+                 */
+                if (os == NULL)
                         goto err;
+                if (!(os->flags & ASN1_STRING_FLAG_NDEF)) {
+                        char *cont;
+                        long contlen;
+
+                        btmp = BIO_find_type(bio, BIO_TYPE_MEM);
+                        if (btmp == NULL) {
+                                PKCS7err(PKCS7_F_PKCS7_DATAFINAL,
+                                    PKCS7_R_UNABLE_TO_FIND_MEM_BIO);
+                                goto err;
+                        }
+                        contlen = BIO_get_mem_data(btmp, &cont);
+                        /*
+                         * Mark the BIO read only then we can use its copy
+                         * of the data instead of making an extra copy.
+                         */
+                        BIO_set_flags(btmp, BIO_FLAGS_MEM_RDONLY);
+                        BIO_set_mem_eof_return(btmp, 0);
+                        ASN1_STRING_set0(os, (unsigned char *)cont, contlen);
                 }
-                contlen = BIO_get_mem_data(btmp, &cont);
-                /* Mark the BIO read only then we can use its copy of the data
-                 * instead of making an extra copy.
-                 */
-                BIO_set_flags(btmp, BIO_FLAGS_MEM_RDONLY);
-                BIO_set_mem_eof_return(btmp, 0);
-                ASN1_STRING_set0(os, (unsigned char *)cont, contlen);
         }
         ret = 1;
 err:
@@ -927,6 +983,17 @@ PKCS7_dataVerify(X509_STORE *cert_store, X509_STORE_CTX *ctx, BIO *bio,
         STACK_OF(X509) *cert;
         X509 *x509;
 
+        if (p7 == NULL) {
+                PKCS7err(PKCS7_F_PKCS7_DATAVERIFY,
+                    PKCS7_R_INVALID_NULL_POINTER);
+                return 0;
+        }
+
+        if (p7->d.ptr == NULL) {
+                PKCS7err(PKCS7_F_PKCS7_DATAVERIFY, PKCS7_R_NO_CONTENT);
+                return 0;
+        }
+
         if (PKCS7_type_is_signed(p7)) {
                 cert = p7->d.sign->cert;
         } else if (PKCS7_type_is_signedAndEnveloped(p7)) {
@@ -963,6 +1030,7 @@ PKCS7_dataVerify(X509_STORE *cert_store, X509_STORE_CTX *ctx, BIO *bio,
 
         return PKCS7_signatureVerify(bio, p7, si, x509);
 err:
+        
         return ret;
 }
 
diff --git a/src/lib/libssl/src/crypto/pkcs7/pk7_lib.c b/src/lib/libssl/src/crypto/pkcs7/pk7_lib.c
index 27370800c9..c9de0eaf5f 100644
--- a/src/lib/libssl/src/crypto/pkcs7/pk7_lib.c
+++ b/src/lib/libssl/src/crypto/pkcs7/pk7_lib.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: pk7_lib.c,v 1.14 2014/07/12 16:03:37 miod Exp $ */
+/* $OpenBSD: pk7_lib.c,v 1.14.4.1 2015/03/19 14:02:22 tedu Exp $ */
 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
@@ -460,6 +460,8 @@ PKCS7_set_digest(PKCS7 *p7, const EVP_MD *md)
 STACK_OF(PKCS7_SIGNER_INFO) *
 PKCS7_get_signer_info(PKCS7 *p7)
 {
+        if (p7 == NULL || p7->d.ptr == NULL)
+                return (NULL);
         if (PKCS7_type_is_signed(p7)) {
                 return (p7->d.sign->signer_info);
         } else if (PKCS7_type_is_signedAndEnveloped(p7)) {
diff --git a/src/lib/libssl/src/crypto/x509/x509_req.c b/src/lib/libssl/src/crypto/x509/x509_req.c
index 22d2124614..433ad1d0b5 100644
--- a/src/lib/libssl/src/crypto/x509/x509_req.c
+++ b/src/lib/libssl/src/crypto/x509/x509_req.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: x509_req.c,v 1.15 2014/07/11 08:44:49 jsing Exp $ */
+/* $OpenBSD: x509_req.c,v 1.15.4.1 2015/03/19 14:02:22 tedu Exp $ */
 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  * All rights reserved.
  *
@@ -95,7 +95,9 @@ X509_to_X509_REQ(X509 *x, EVP_PKEY *pkey, const EVP_MD *md)
         if (!X509_REQ_set_subject_name(ret, X509_get_subject_name(x)))
                 goto err;
 
-        pktmp = X509_get_pubkey(x);
+        if ((pktmp = X509_get_pubkey(x)) == NULL)
+                goto err;
+
         i = X509_REQ_set_pubkey(ret, pktmp);
         EVP_PKEY_free(pktmp);
         if (!i)
diff --git a/src/lib/libssl/src/ssl/d1_lib.c b/src/lib/libssl/src/ssl/d1_lib.c
index ff78d0cf3a..7b66a838e0 100644
--- a/src/lib/libssl/src/ssl/d1_lib.c
+++ b/src/lib/libssl/src/ssl/d1_lib.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: d1_lib.c,v 1.24 2014/07/17 23:48:24 deraadt Exp $ */
+/* $OpenBSD: d1_lib.c,v 1.24.4.1 2015/03/19 14:02:23 tedu Exp $ */
 /* 
  * DTLS implementation written by Nagendra Modadugu
  * (nagendra@cs.stanford.edu) for the OpenSSL project 2005.  
@@ -449,6 +449,9 @@ dtls1_listen(SSL *s, struct sockaddr *client)
 {
         int ret;
 
+        /* Ensure there is no state left over from a previous invocation */
+        SSL_clear(s);
+
         SSL_set_options(s, SSL_OP_COOKIE_EXCHANGE);
         s->d1->listen = 1;