urlparse: accept '#' as end of host name
'http://example.com#@127.0.0.1/x.txt' equals a request to example.com
for the '/' document with the rest of the URL being a fragment.
CVE-2016-8624
Bug: https://curl.haxx.se/docs/adv_20161102J.html
Reported-by: Fernando Muñoz
diff --git a/lib/url.c b/lib/url.c
index 91b2bf8..98236e2 100644
--- a/lib/url.c
+++ b/lib/url.c
@@ -4164,7 +4164,7 @@
path[0]=0;
rc = sscanf(data->change.url,
- "%15[^\n:]:%3[/]%[^\n/?]%[^\n]",
+ "%15[^\n:]:%3[/]%[^\n/?#]%[^\n]",
protobuf, slashbuf, conn->host.name, path);
if(2 == rc) {
failf(data, "Bad URL");
@@ -4176,7 +4176,7 @@
* The URL was badly formatted, let's try the browser-style _without_
* protocol specified like 'http://'.
*/
- rc = sscanf(data->change.url, "%[^\n/?]%[^\n]", conn->host.name, path);
+ rc = sscanf(data->change.url, "%[^\n/?#]%[^\n]", conn->host.name, path);
if(1 > rc) {
/*
* We couldn't even get this format.
@@ -4281,10 +4281,10 @@
}
/* If the URL is malformatted (missing a '/' after hostname before path) we
- * insert a slash here. The only letter except '/' we accept to start a path
- * is '?'.
+ * insert a slash here. The only letters except '/' that can start a path is
+ * '?' and '#' - as controlled by the two sscanf() patterns above.
*/
- if(path[0] == '?') {
+ if(path[0] != '/') {
/* We need this function to deal with overlapping memory areas. We know
that the memory area 'path' points to is 'urllen' bytes big and that
is bigger than the path. Use +1 to move the zero byte too. */
