TLS: Fix switching off SSL session id when client cert is used

Move the sessionid flag to ssl_primary_config so that ssl and proxy_ssl
will each have their own sessionid flag.

Regression since HTTPS-Proxy support was added in cb4e2be. Prior to that
this issue had been fixed in 247d890, CVE-2016-5419.

Bug: https://github.com/curl/curl/issues/1341
Reported-by: lijian996@users.noreply.github.com
The new incarnation of this bug is called CVE-2017-7468 and is documented
here: https://curl.haxx.se/docs/adv_20170419.html

diff --git a/lib/url.c b/lib/url.c
index 4609f4fdaab540d24dd5972a57c92fd53907d89e..caa28f5d44e9bf586dc2ae7bec930e5689a09949 100644 (file)
--- a/lib/url.c
+++ b/lib/url.c
@@ -546,7 +546,7 @@ CURLcode Curl_init_userdefined(struct UserDefined *set)
 #endif
   set->ssh_auth_types = CURLSSH_AUTH_DEFAULT; /* defaults to any auth
                                                       type */
-  set->general_ssl.sessionid = TRUE; /* session ID caching enabled by
+  set->ssl.primary.sessionid = TRUE; /* session ID caching enabled by
                                         default */
   set->proxy_ssl = set->ssl;
 
@@ -2499,8 +2499,9 @@ CURLcode Curl_setopt(struct Curl_easy *data, CURLoption option,
     break;
 
   case CURLOPT_SSL_SESSIONID_CACHE:
-    data->set.general_ssl.sessionid = (0 != va_arg(param, long)) ?
+    data->set.ssl.primary.sessionid = (0 != va_arg(param, long)) ?
                                       TRUE : FALSE;
+    data->set.proxy_ssl.primary.sessionid = data->set.ssl.primary.sessionid;
     break;
 
 #ifdef USE_LIBSSH2

diff --git a/lib/urldata.h b/lib/urldata.h
index bd7d25d2f996660a814ffff0c64f5e35c9731463..3c94553a18e98082af4830f9d6bab9f99e1aef62 100644 (file)
--- a/lib/urldata.h
+++ b/lib/urldata.h
@@ -360,6 +360,7 @@ struct ssl_primary_config {
   char *random_file;     /* path to file containing "random" data */
   char *egdsocket;       /* path to file containing the EGD daemon socket */
   char *cipher_list;     /* list of ciphers to use */
+  bool sessionid;        /* cache session IDs or not */
 };
 
 struct ssl_config_data {
@@ -389,7 +390,6 @@ struct ssl_config_data {
 };
 
 struct ssl_general_config {
-  bool sessionid; /* cache session IDs or not */
   size_t max_ssl_sessions; /* SSL session id cache size */
 };
 

diff --git a/lib/vtls/axtls.c b/lib/vtls/axtls.c
index af01fe314a99ebb03336a7ace7323c34e4801319..f0e376640c27cc43efaf41737f4b59a53012b2ac 100644 (file)
--- a/lib/vtls/axtls.c
+++ b/lib/vtls/axtls.c
@@ -262,7 +262,7 @@ static CURLcode connect_prep(struct connectdata *conn, int sockindex)
    * 2) setting up callbacks.  these seem gnutls specific
    */
 
-  if(data->set.general_ssl.sessionid) {
+  if(SSL_SET_OPTION(primary.sessionid)) {
     const uint8_t *ssl_sessionid;
     size_t ssl_idsize;
 
@@ -392,7 +392,7 @@ static CURLcode connect_finish(struct connectdata *conn, int sockindex)
   conn->send[sockindex] = axtls_send;
 
   /* Put our freshly minted SSL session in cache */
-  if(data->set.general_ssl.sessionid) {
+  if(SSL_SET_OPTION(primary.sessionid)) {
     const uint8_t *ssl_sessionid = ssl_get_session_id(ssl);
     size_t ssl_idsize = ssl_get_session_id_size(ssl);
     Curl_ssl_sessionid_lock(conn);

diff --git a/lib/vtls/cyassl.c b/lib/vtls/cyassl.c
index 2dfd79dce3bf4c86404866e5004109dace3b2867..5f51ad5f99c50592d737991751a0fbeac79a8563 100644 (file)
--- a/lib/vtls/cyassl.c
+++ b/lib/vtls/cyassl.c
@@ -398,7 +398,7 @@ cyassl_connect_step1(struct connectdata *conn,
 #endif /* HAVE_ALPN */
 
   /* Check if there's a cached ID we can/should use here! */
-  if(data->set.general_ssl.sessionid) {
+  if(SSL_SET_OPTION(primary.sessionid)) {
     void *ssl_sessionid = NULL;
 
     Curl_ssl_sessionid_lock(conn);
@@ -618,7 +618,7 @@ cyassl_connect_step3(struct connectdata *conn,
 
   DEBUGASSERT(ssl_connect_3 == connssl->connecting_state);
 
-  if(data->set.general_ssl.sessionid) {
+  if(SSL_SET_OPTION(primary.sessionid)) {
     bool incache;
     SSL_SESSION *our_ssl_sessionid;
     void *old_ssl_sessionid = NULL;

diff --git a/lib/vtls/darwinssl.c b/lib/vtls/darwinssl.c
index f8697cc79a8730f5702f19d28c1248641ce7d232..5533dfe2f7c30a314a7896f97b76e84c0d94073f 100644 (file)
--- a/lib/vtls/darwinssl.c
+++ b/lib/vtls/darwinssl.c
@@ -1644,7 +1644,7 @@ static CURLcode darwinssl_connect_step1(struct connectdata *conn,
 #endif /* CURL_BUILD_MAC_10_9 || CURL_BUILD_IOS_7 */
 
   /* Check if there's a cached ID we can/should use here! */
-  if(data->set.general_ssl.sessionid) {
+  if(SSL_SET_OPTION(primary.sessionid)) {
     char *ssl_sessionid;
     size_t ssl_sessionid_len;
 

diff --git a/lib/vtls/gtls.c b/lib/vtls/gtls.c
index 51a5aa85bb40ae90b1c0e92772ab52c09039a1aa..0230778e2b04f1e61e5da111bfda58a455a961d4 100644 (file)
--- a/lib/vtls/gtls.c
+++ b/lib/vtls/gtls.c
@@ -873,7 +873,7 @@ gtls_connect_step1(struct connectdata *conn,
 
   /* This might be a reconnect, so we check for a session ID in the cache
      to speed up things */
-  if(data->set.general_ssl.sessionid) {
+  if(SSL_SET_OPTION(primary.sessionid)) {
     void *ssl_sessionid;
     size_t ssl_idsize;
 
@@ -1404,7 +1404,7 @@ gtls_connect_step3(struct connectdata *conn,
   conn->recv[sockindex] = gtls_recv;
   conn->send[sockindex] = gtls_send;
 
-  if(data->set.general_ssl.sessionid) {
+  if(SSL_SET_OPTION(primary.sessionid)) {
     /* we always unconditionally get the session id here, as even if we
        already got it from the cache and asked to use it in the connection, it
        might've been rejected and then a new one is in use now and we need to

diff --git a/lib/vtls/mbedtls.c b/lib/vtls/mbedtls.c
index edf30dbd96583023791b3f23006076624c10c860..3ffa95752c88cc76e55d7b71838ff843f06287ad 100644 (file)
--- a/lib/vtls/mbedtls.c
+++ b/lib/vtls/mbedtls.c
@@ -430,7 +430,7 @@ mbed_connect_step1(struct connectdata *conn,
 #endif
 
   /* Check if there's a cached ID we can/should use here! */
-  if(data->set.general_ssl.sessionid) {
+  if(SSL_SET_OPTION(primary.sessionid)) {
     void *old_session = NULL;
 
     Curl_ssl_sessionid_lock(conn);
@@ -684,7 +684,7 @@ mbed_connect_step3(struct connectdata *conn,
 
   DEBUGASSERT(ssl_connect_3 == connssl->connecting_state);
 
-  if(data->set.general_ssl.sessionid) {
+  if(SSL_SET_OPTION(primary.sessionid)) {
     int ret;
     mbedtls_ssl_session *our_ssl_sessionid;
     void *old_ssl_sessionid = NULL;

diff --git a/lib/vtls/nss.c b/lib/vtls/nss.c
index 1d7047a3dcb6ba190737befa159ddea926d6c2cd..4898511312a858cd1b706886ff7aca6c533784c8 100644 (file)
--- a/lib/vtls/nss.c
+++ b/lib/vtls/nss.c
@@ -1720,7 +1720,7 @@ static CURLcode nss_setup_connect(struct connectdata *conn, int sockindex)
     goto error;
 
   /* do not use SSL cache if disabled or we are not going to verify peer */
-  ssl_no_cache = (data->set.general_ssl.sessionid
+  ssl_no_cache = (SSL_SET_OPTION(primary.sessionid)
                   && SSL_CONN_CONFIG(verifypeer)) ? PR_FALSE : PR_TRUE;
   if(SSL_OptionSet(model, SSL_NO_CACHE, ssl_no_cache) != SECSuccess)
     goto error;

diff --git a/lib/vtls/openssl.c b/lib/vtls/openssl.c
index ee076157631339cf4e14646af04dc04304e9afa4..58a014a4d7c449347b84e0b7ae851d229788fe36 100644 (file)
--- a/lib/vtls/openssl.c
+++ b/lib/vtls/openssl.c
@@ -2235,7 +2235,7 @@ static CURLcode ossl_connect_step1(struct connectdata *conn, int sockindex)
 #endif
 
   /* Check if there's a cached ID we can/should use here! */
-  if(data->set.general_ssl.sessionid) {
+  if(SSL_SET_OPTION(primary.sessionid)) {
     void *ssl_sessionid = NULL;
 
     Curl_ssl_sessionid_lock(conn);
@@ -2965,7 +2965,7 @@ static CURLcode ossl_connect_step3(struct connectdata *conn, int sockindex)
 
   DEBUGASSERT(ssl_connect_3 == connssl->connecting_state);
 
-  if(data->set.general_ssl.sessionid) {
+  if(SSL_SET_OPTION(primary.sessionid)) {
     bool incache;
     SSL_SESSION *our_ssl_sessionid;
     void *old_ssl_sessionid = NULL;

diff --git a/lib/vtls/polarssl.c b/lib/vtls/polarssl.c
index e6ad525ea2ff149c6577775cf463988553cda535..669091cb5384df3a4365dcd7c81483202a6063c0 100644 (file)
--- a/lib/vtls/polarssl.c
+++ b/lib/vtls/polarssl.c
@@ -375,7 +375,7 @@ polarssl_connect_step1(struct connectdata *conn,
   ssl_set_ciphersuites(&connssl->ssl, ssl_list_ciphersuites());
 
   /* Check if there's a cached ID we can/should use here! */
-  if(data->set.general_ssl.sessionid) {
+  if(SSL_SET_OPTION(primary.sessionid)) {
     void *old_session = NULL;
 
     Curl_ssl_sessionid_lock(conn);
@@ -603,7 +603,7 @@ polarssl_connect_step3(struct connectdata *conn,
 
   DEBUGASSERT(ssl_connect_3 == connssl->connecting_state);
 
-  if(data->set.general_ssl.sessionid) {
+  if(SSL_SET_OPTION(primary.sessionid)) {
     int ret;
     ssl_session *our_ssl_sessionid;
     void *old_ssl_sessionid = NULL;

diff --git a/lib/vtls/schannel.c b/lib/vtls/schannel.c
index e0fb2d5f65896d789ac516314cd17325968d7f83..c9b513230af708786da9e3103932c26d079d5399 100644 (file)
--- a/lib/vtls/schannel.c
+++ b/lib/vtls/schannel.c
@@ -188,7 +188,7 @@ schannel_connect_step1(struct connectdata *conn, int sockindex)
   connssl->cred = NULL;
 
   /* check for an existing re-usable credential handle */
-  if(data->set.general_ssl.sessionid) {
+  if(SSL_SET_OPTION(primary.sessionid)) {
     Curl_ssl_sessionid_lock(conn);
     if(!Curl_ssl_getsessionid(conn, (void **)&old_cred, NULL, sockindex)) {
       connssl->cred = old_cred;
@@ -757,7 +757,7 @@ schannel_connect_step3(struct connectdata *conn, int sockindex)
 #endif
 
   /* save the current session data for possible re-use */
-  if(data->set.general_ssl.sessionid) {
+  if(SSL_SET_OPTION(primary.sessionid)) {
     bool incache;
     struct curl_schannel_cred *old_cred = NULL;
 

diff --git a/lib/vtls/vtls.c b/lib/vtls/vtls.c
index c6935b5e67268da4b19abe477c2a462e50b05e6d..d5d0971c453dc2d0362ce69c525708da313cc263 100644 (file)
--- a/lib/vtls/vtls.c
+++ b/lib/vtls/vtls.c
@@ -122,6 +122,9 @@ Curl_clone_primary_ssl_config(struct ssl_primary_config *source,
   CLONE_STRING(egdsocket);
   CLONE_STRING(random_file);
   CLONE_STRING(clientcert);
+
+  /* Disable dest sessionid cache if a client cert is used, CVE-2016-5419. */
+  dest->sessionid = (dest->clientcert ? false : source->sessionid);
   return TRUE;
 }
 
@@ -308,9 +311,9 @@ bool Curl_ssl_getsessionid(struct connectdata *conn,
   int port = isProxy ? (int)conn->port : conn->remote_port;
   *ssl_sessionid = NULL;
 
-  DEBUGASSERT(data->set.general_ssl.sessionid);
+  DEBUGASSERT(SSL_SET_OPTION(primary.sessionid));
 
-  if(!data->set.general_ssl.sessionid)
+  if(!SSL_SET_OPTION(primary.sessionid))
     /* session ID re-use is disabled */
     return TRUE;
 
@@ -412,7 +415,7 @@ CURLcode Curl_ssl_addsessionid(struct connectdata *conn,
     &conn->proxy_ssl_config :
     &conn->ssl_config;
 
-  DEBUGASSERT(data->set.general_ssl.sessionid);
+  DEBUGASSERT(SSL_SET_OPTION(primary.sessionid));
 
   clone_host = strdup(isProxy ? conn->http_proxy.host.name : conn->host.name);
   if(!clone_host)