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[svn] Fix bogus ".." hosts injecting such components to path.

This commit is contained in:
hniksic 2005-03-05 15:04:05 -08:00
parent b3363d2abd
commit 18acfe8130
2 changed files with 12 additions and 1 deletions
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5
src/ChangeLog
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@ -1,3 +1,8 @@
2005-03-05 Hrvoje Niksic <hniksic@xemacs.org>
* url.c (url_file_name): Don't allow hosts named ".." to be
appended as path elements.
2005-03-03 Hrvoje Niksic <hniksic@xemacs.org>
* retr.c (retrieve_url): Escape location header.

8
src/url.c
View File

@ -1454,7 +1454,13 @@ url_file_name (const struct url *u)
{
if (fnres.tail)
append_char ('/', &fnres);
append_string (u->host, &fnres);
if (0 != strcmp (u->host, ".."))
append_string (u->host, &fnres);
else
/* Host name can come from the network; malicious DNS may
allow ".." to be resolved, causing us to write to
"../<file>". Defang such host names. */
append_string ("%2E%2E", &fnres);
if (u->port != scheme_default_port (u->scheme))
{
char portstr[24];