From ad9943254ded9a983af7d581e8a1f3317e8a8781 Mon Sep 17 00:00:00 2001

From: Daniel Stenberg <daniel@haxx.se>

Date: Fri, 28 Sep 2018 16:08:16 +0200

Subject: [PATCH] Curl_auth_create_plain_message: fix too-large-input-check

CVE-2018-16839

Reported-by: Harry Sintonen

Bug: https://curl.haxx.se/docs/CVE-2018-16839.html

Upstream-commit: f3a24d7916b9173c69a3e0ee790102993833d6c5

Signed-off-by: Kamil Dudka <kdudka@redhat.com>

---

 lib/vauth/cleartext.c | 2 +-

 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/vauth/cleartext.c b/lib/vauth/cleartext.c

index 5d61ce6..1367143 100644

--- a/lib/vauth/cleartext.c

+++ b/lib/vauth/cleartext.c

@@ -74,7 +74,7 @@ CURLcode Curl_auth_create_plain_message(struct Curl_easy *data,

   plen = strlen(passwdp);

   /* Compute binary message length. Check for overflows. */

-  if((ulen > SIZE_T_MAX/2) || (plen > (SIZE_T_MAX/2 - 2)))

+  if((ulen > SIZE_T_MAX/4) || (plen > (SIZE_T_MAX/2 - 2)))

     return CURLE_OUT_OF_MEMORY;

   plainlen = 2 * ulen + plen + 2;

-- 

2.17.2