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Issue 22663: fix redirect vulnerability in urllib/urllib2.

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This commit is contained in:
guido@google.com 2011-03-24 08:07:45 -07:00
parent ce5d0e22fc
commit 60a4a90c8d
2 changed files with 18 additions and 2 deletions
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13
Lib/urllib.py
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@ -638,10 +638,19 @@ class FancyURLopener(URLopener):
newurl = headers['uri']
else:
return
void = fp.read()
fp.close()
# In case the server sent a relative URL, join with original:
newurl = basejoin(self.type + ":" + url, newurl)
# For security reasons we do not allow redirects to protocols
# other than HTTP or HTTPS.
newurl_lower = newurl.lower()
if not (newurl_lower.startswith('http://') or
newurl_lower.startswith('https://')):
return
void = fp.read()
fp.close()
return self.open(newurl)
def http_error_301(self, url, fp, errcode, errmsg, headers, data=None):