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: eafbe104727d79643c1738360789ae455fff116c)

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

2 files changed, 53 insertions, 1 deletions

diff --git a/meta/recipes-support/curl/curl/CVE-2017-1000100.patch b/meta/recipes-support/curl/curl/CVE-2017-1000100.patch
new file mode 100644
index 0000000000..508df8c7db
--- /dev/null
+++ b/meta/recipes-support/curl/curl/CVE-2017-1000100.patch
@@ -0,0 +1,50 @@
+From 358b2b131ad6c095696f20dcfa62b8305263f898 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!
+
+CVE-2017-1000100
+
+Bug: https://curl.haxx.se/docs/adv_20170809B.html
+Reported-by: Even Rouault
+
+Credit to OSS-Fuzz for the discovery
+
+Upstream-Status: Backport
+https://github.com/curl/curl/commit/358b2b131ad6c095696f20dcfa62b8305263f898
+
+CVE: CVE-2017-1000100
+Signed-off-by: Armin Kuster <akuster@mvista.com>
+
+---
+ lib/tftp.c | 7 ++++++-
+ 1 file changed, 6 insertions(+), 1 deletion(-)
+
+Index: curl-7.53.1/lib/tftp.c
+===================================================================
+--- curl-7.53.1.orig/lib/tftp.c
++++ curl-7.53.1/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
+@@ -490,6 +490,11 @@ static CURLcode tftp_send_first(tftp_sta
+     if(result)
+       return result;
+ 
++    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');
diff --git a/meta/recipes-support/curl/curl_7.53.1.bb b/meta/recipes-support/curl/curl_7.53.1.bb
index a3d7cb949d..72828fe814 100644
--- a/meta/recipes-support/curl/curl_7.53.1.bb
+++ b/meta/recipes-support/curl/curl_7.53.1.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-2017-1000100.patch \
+             "
 
 SRC_URI[md5sum] = "fb1f03a142236840c1a77c035fa4c542"
 SRC_URI[sha256sum] = "1c7207c06d75e9136a944a2e0528337ce76f15b9ec9ae4bb30d703b59bf530e8"