diff options
Diffstat (limited to 'Lib/urllib/request.py')
| -rw-r--r-- | Lib/urllib/request.py | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/Lib/urllib/request.py b/Lib/urllib/request.py index 53e8107..ebbebe9 100644 --- a/Lib/urllib/request.py +++ b/Lib/urllib/request.py @@ -545,6 +545,17 @@ class HTTPRedirectHandler(BaseHandler): # fix a possible malformed URL urlparts = urlparse(newurl) + + # For security reasons we don't allow redirection to anything other + # than http, https or ftp. + + if not urlparts.scheme in ('http', 'https', 'ftp'): + raise HTTPError(newurl, code, + msg + + " - Redirection to url '%s' is not allowed" % + newurl, + headers, fp) + if not urlparts.path: urlparts = list(urlparts) urlparts[2] = "/" @@ -1903,8 +1914,24 @@ class FancyURLopener(URLopener): return void = fp.read() fp.close() + # In case the server sent a relative URL, join with original: newurl = urljoin(self.type + ":" + url, newurl) + + urlparts = urlparse(newurl) + + # For security reasons, we don't allow redirection to anything other + # than http, https and ftp. + + # We are using newer HTTPError with older redirect_internal method + # This older method will get deprecated in 3.3 + + if not urlparts.scheme in ('http', 'https', 'ftp'): + raise HTTPError(newurl, errcode, + errmsg + + " Redirection to url '%s' is not allowed." % newurl, + headers, fp) + return self.open(newurl) def http_error_301(self, url, fp, errcode, errmsg, headers, data=None): |