Fix CVE-2017-6508:

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-6508

Patch copied from upstream source repository:

https://git.savannah.gnu.org/cgit/wget.git/commit/?id=4d729e322fae359a1aefaafec1144764a54e8ad4

From 4d729e322fae359a1aefaafec1144764a54e8ad4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Tim=20R=C3=BChsen?= <tim.ruehsen@gmx.de>
Date: Mon, 6 Mar 2017 10:04:22 +0100
Subject: [PATCH] Fix CRLF injection in Wget host part

* src/url.c (url_parse): Reject control characters in host part of URL

Reported-by: Orange Tsai
---
 src/url.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/src/url.c b/src/url.c
index 8f8ff0b8..7d36b27d 100644
--- a/src/url.c
+++ b/src/url.c
@@ -925,6 +925,17 @@ url_parse (const char *url, int *error, struct iri *iri, bool percent_encode)
       url_unescape (u->host);
       host_modified = true;
 
+      /* check for invalid control characters in host name */
+      for (p = u->host; *p; p++)
+        {
+          if (c_iscntrl(*p))
+            {
+              url_free(u);
+              error_code = PE_INVALID_HOST_NAME;
+              goto error;
+            }
+        }
+
       /* Apply IDNA regardless of iri->utf8_encode status */
       if (opt.enable_iri && iri)
         {
-- 
2.12.0

