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- From 6218ded6001ea330e589f92b6b2fa12777752b5d Mon Sep 17 00:00:00 2001
- From: Daniel Stenberg <daniel@haxx.se>
- Date: Thu, 16 Apr 2015 23:52:04 +0200
- Subject: [PATCH] fix_hostname: zero length host name caused -1 index offset
- MIME-Version: 1.0
- Content-Type: text/plain; charset=UTF-8
- Content-Transfer-Encoding: 8bit
-
- If a URL is given with a zero-length host name, like in "http://:80" or
- just ":80", `fix_hostname()` will index the host name pointer with a -1
- offset (as it blindly assumes a non-zero length) and both read and
- assign that address.
-
- CVE-2015-3144
-
- Bug: http://curl.haxx.se/docs/adv_20150422D.html
- Reported-by: Hanno Böck
- ---
- lib/url.c | 2 +-
- 1 file changed, 1 insertion(+), 1 deletion(-)
-
- --- a/lib/url.c
- +++ b/lib/url.c
- @@ -3602,7 +3602,7 @@ static void fix_hostname(struct SessionH
- host->dispname = host->name;
-
- len = strlen(host->name);
- - if(host->name[len-1] == '.')
- + if(len && (host->name[len-1] == '.'))
- /* strip off a single trailing dot if present, primarily for SNI but
- there's no use for it */
- host->name[len-1]=0;
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