From f3a24d7916b9173c69a3e0ee790102993833d6c5 Mon Sep 17 00:00:00 2001 From: Daniel Stenberg 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 --- lib/vauth/cleartext.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/lib/vauth/cleartext.c +++ b/lib/vauth/cleartext.c @@ -74,7 +74,7 @@ CURLcode Curl_auth_create_plain_message( 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;