path: root/recipes-support/curl/curl/CVE-2017-7468.patch

From 33cfcfd9f0378625d3bddbd2c8ac5aad4b646f26 Mon Sep 17 00:00:00 2001
From: Jay Satiro <raysatiro@yahoo.com>
Date: Wed, 22 Mar 2017 01:59:49 -0400
Subject: [PATCH] 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

CVE: CVE-2017-7468
Upstream-Status: Backport [backport from curl-7_54_1]

The new incarnation of this bug is called CVE-2017-7468 and is documented
here: https://curl.haxx.se/docs/adv_20170419.html

Signed-off-by: Sona Sarmadi <sona.sarmadi@enea.com>
---
 lib/url.c            | 5 +++--
 lib/urldata.h        | 2 +-
 lib/vtls/axtls.c     | 4 ++--
 lib/vtls/cyassl.c    | 4 ++--
 lib/vtls/darwinssl.c | 2 +-
 lib/vtls/gtls.c      | 4 ++--
 lib/vtls/mbedtls.c   | 4 ++--
 lib/vtls/nss.c       | 2 +-
 lib/vtls/openssl.c   | 4 ++--
 lib/vtls/polarssl.c  | 4 ++--
 lib/vtls/schannel.c  | 4 ++--
 lib/vtls/vtls.c      | 9 ++++++---
 12 files changed, 26 insertions(+), 22 deletions(-)

diff --git a/lib/url.c b/lib/url.c
index 4609f4f..caa28f5 100644
--- 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 bd7d25d..3c94553 100644
--- 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 af01fe3..f0e3766 100644
--- 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 2dfd79d..5f51ad5 100644
--- 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 f8697cc..5533dfe 100644
--- 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 51a5aa8..0230778 100644
--- 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 edf30db..3ffa957 100644
--- 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 1d7047a..4898511 100644
--- 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 ee07615..58a014a 100644
--- 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 e6ad525..669091c 100644
--- 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 e0fb2d5..c9b5132 100644
--- 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 c6935b5..d5d0971 100644
--- 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)
-- 
1.9.1