CVE-2016-5421.patch

From ccb7d79b62c8b15a6be446f9c9fd3767c01eb5b6 Mon Sep 17 00:00:00 2001
From: Daniel Stenberg <daniel@haxx.se>
Date: Sun, 31 Jul 2016 01:09:04 +0200
Subject: [PATCH] curl_multi_cleanup: clear connection pointer for easy handles
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CVE-2016-5421
Bug: https://curl.se/docs/adv_20160803C.html
Reported-by: Marcelo Echeverria and Fernando Muñoz
---
 lib/multi.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lib/multi.c b/lib/multi.c
index 9ee3523..8bb9366 100644
--- a/lib/multi.c
+++ b/lib/multi.c
@@ -2155,10 +2155,12 @@ static void close_all_connections(struct Curl_multi *multi)
   while(conn) {
     SIGPIPE_VARIABLE(pipe_st);
     conn->data = multi->closure_handle;
 
     sigpipe_ignore(conn->data, &pipe_st);
+    conn->data->easy_conn = NULL; /* clear the easy handle's connection
+                                     pointer */
     /* This will remove the connection from the cache */
     (void)Curl_disconnect(conn, FALSE);
     sigpipe_restore(&pipe_st);
 
     conn = Curl_conncache_find_first_connection(&multi->conn_cache);
-- 
2.8.1