curl: Security fix for CVE-2017-1000100

Affected versions: libcurl 7.15.0 to and including 7.54.1
Not affected versions: libcurl < 7.15.0 and >= 7.55.0

(From OE-Core rev: 2ad0d34313b30f3f18d2f15879294fab310aa874)

Signed-off-by: Rajkumar Veer <rveer@mvista.com>
Signed-off-by: Armin Kuster <akuster@mvista.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-support/curl/curl/CVE-2017-1000100.patch

@@ -0,0 +1,47 @@
+From 4f58c108fa9a9a13b7dbbd2fd420c998dc92f851 Mon Sep 17 00:00:00 2001
+From: Daniel Stenberg <daniel@haxx.se>
+Date: Tue, 1 Aug 2017 17:16:46 +0200
+Subject: [PATCH] tftp: reject file name lengths that don't fit
+
+...and thereby avoid telling send() to send off more bytes than the
+size of the buffer!
+
+Bug: https://curl.haxx.se/docs/adv_20170809B.html
+Reported-by: Even Rouault
+Credit to OSS-Fuzz for the discovery
+
+Upstream-Status: Backport
+CVE: CVE-2017-1000100
+Signed-off-by: Rajkumar Veer <rveer@mvista.com>
+---
+ lib/tftp.c | 7 ++++++-
+ 1 file changed, 6 insertions(+), 1 deletion(-)
+
+diff --git a/lib/tftp.c b/lib/tftp.c
+index d7ff94f..083b083 100644
+--- a/lib/tftp.c
++++ b/lib/tftp.c
+@@ -5,7 +5,7 @@
+  *                            | (__| |_| |  _ <| |___
+  *                             \___|\___/|_| \_\_____|
+  *
+- * Copyright (C) 1998 - 2016, Daniel Stenberg, <daniel@haxx.se>, et al.
++ * Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
+  *
+  * This software is licensed as described in the file COPYING, which
+  * you should have received as part of this distribution. The terms
+@@ -489,6 +489,11 @@ static CURLcode tftp_send_first(tftp_state_data_t *state, tftp_event_t event)
+     if(!filename)
+       return CURLE_OUT_OF_MEMORY;
+ 
++    if(strlen(filename) > (state->blksize - strlen(mode) - 4)) {
++      failf(data, "TFTP file name too long\n");
++      return CURLE_TFTP_ILLEGAL; /* too long file name field */
++    }
++
+     snprintf((char *)state->spacket.data+2,
+              state->blksize,
+              "%s%c%s%c", filename, '\0',  mode, '\0');
+-- 
+1.9.1
+

meta/recipes-support/curl/curl_7.50.1.bb

@@ -22,6 +22,7 @@ SRC_URI += " file://configure_ac.patch \
              file://CVE-2016-8617.patch \
              file://CVE-2016-8624.patch \
              file://CVE-2016-9586.patch \
+             file://CVE-2017-1000100.patch \
            "
 
 SRC_URI[md5sum] = "015f6a0217ca6f2c5442ca406476920b"