curl: Security fix for CVE-2016-8615

Affected versions: curl 7.1 to and including 7.50.3
Not affected versions: curl >= 7.51.0

(From OE-Core rev: b754be84206b454789fbd6d444d00a4e422cb3e9)

Signed-off-by: Thiruvadi Rajaraman <trajaraman@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-2016-8615.patch

@@ -0,0 +1,71 @@
+From 1620f552a277ed5b23a48b9c27dbf07663cac068 Mon Sep 17 00:00:00 2001
+From: Daniel Stenberg <daniel@haxx.se>
+Date: Tue, 27 Sep 2016 17:36:19 +0200
+Subject: [PATCH] cookie: replace use of fgets() with custom version
+
+... that will ignore lines that are too long to fit in the buffer.
+
+CVE-2016-8615
+
+Bug: https://curl.haxx.se/docs/adv_20161102A.html
+Reported-by: Cure53
+
+Upstream-Status: Backport
+https://curl.haxx.se/CVE-2016-8615.patch
+
+CVE: CVE-2016-8615
+Signed-off-by: Thiruvadi Rajaraman <trajaraman@mvista.com>
+
+---
+ lib/cookie.c | 31 ++++++++++++++++++++++++++++++-
+ 1 file changed, 30 insertions(+), 1 deletion(-)
+
+Index: curl-7.44.0/lib/cookie.c
+===================================================================
+--- curl-7.44.0.orig/lib/cookie.c
++++ curl-7.44.0/lib/cookie.c
+@@ -869,6 +869,35 @@ Curl_cookie_add(struct SessionHandle *da
+   return co;
+ }
+ 
++/*
++ * get_line() makes sure to only return complete whole lines that fit in 'len'
++ * bytes and end with a newline.
++ */
++static char *get_line(char *buf, int len, FILE *input)
++{
++  bool partial = FALSE;
++  while(1) {
++    char *b = fgets(buf, len, input);
++    if(b) {
++      size_t rlen = strlen(b);
++      if(rlen && (b[rlen-1] == '\n')) {
++        if(partial) {
++          partial = FALSE;
++          continue;
++        }
++        return b;
++      }
++      else
++        /* read a partial, discard the next piece that ends with newline */
++        partial = TRUE;
++    }
++    else
++      break;
++  }
++  return NULL;
++}
++
++
+ /*****************************************************************************
+  *
+  * Curl_cookie_init()
+@@ -925,7 +954,7 @@ struct CookieInfo *Curl_cookie_init(stru
+     line = malloc(MAX_COOKIE_LINE);
+     if(!line)
+       goto fail;
+-    while(fgets(line, MAX_COOKIE_LINE, fp)) {
++    while(get_line(line, MAX_COOKIE_LINE, fp)) {
+       if(checkprefix("Set-Cookie:", line)) {
+         /* This is a cookie line, get it! */
+         lineptr=&line[11];

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

@@ -12,7 +12,9 @@ SRC_URI = "http://curl.haxx.se/download/curl-${PV}.tar.bz2 \
 # curl likes to set -g0 in CFLAGS, so we stop it
 # from mucking around with debug options
 #
-SRC_URI += " file://configure_ac.patch"
+SRC_URI += " file://configure_ac.patch \
+             file://CVE-2016-8615.patch \
+           "
 
 SRC_URI[md5sum] = "015f6a0217ca6f2c5442ca406476920b"
 SRC_URI[sha256sum] = "3c12c5f54ccaa1d40abc65d672107dcc75d3e1fcb38c267484334280096e5156"