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Fixed #15182 - Fixed a security issue with ClearableFileInput. Disclosure and new release forthcoming. 

git-svn-id: http://code.djangoproject.com/svn/django/trunk@15470 bcc190cf-cafb-0310-a4f2-bffc1f526a37
This commit is contained in:
Carl Meyer 2011-02-09 02:41:32 +00:00
parent 6ca7c9c495
commit 9f6d50d02e
2 changed files with 26 additions and 3 deletions
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7
django/forms/widgets.py
View File

@ -330,12 +330,13 @@ class ClearableFileInput(FileInput):
if value and hasattr(value, "url"):
template = self.template_with_initial
substitutions['initial'] = (u'<a href="%s">%s</a>'
% (value.url, value))
% (escape(value.url),
escape(force_unicode(value))))
if not self.is_required:
checkbox_name = self.clear_checkbox_name(name)
checkbox_id = self.clear_checkbox_id(checkbox_name)
substitutions['clear_checkbox_name'] = checkbox_name
substitutions['clear_checkbox_id'] = checkbox_id
substitutions['clear_checkbox_name'] = conditional_escape(checkbox_name)
substitutions['clear_checkbox_id'] = conditional_escape(checkbox_id)
substitutions['clear'] = CheckboxInput().render(checkbox_name, False, attrs={'id': checkbox_id})
substitutions['clear_template'] = self.template_with_clear % substitutions

22
tests/regressiontests/forms/tests/widgets.py
View File

@ -1086,6 +1086,28 @@ class ClearableFileInputTests(TestCase):
self.assertEqual(widget.render('myfile', FakeFieldFile()),
u'Currently: <a href="something">something</a> <input type="checkbox" name="myfile-clear" id="myfile-clear_id" /> <label for="myfile-clear_id">Clear</label><br />Change: <input type="file" name="myfile" />')
def test_html_escaped(self):
"""
A ClearableFileInput should escape name, filename and URL when
rendering HTML. Refs #15182.
"""
class StrangeFieldFile(object):
url = "something?chapter=1&sect=2&copy=3&lang=en"
def __unicode__(self):
return u'''something<div onclick="alert('oops')">.jpg'''
widget = ClearableFileInput()
field = StrangeFieldFile()
output = widget.render('my<div>file', field)
self.assertFalse(field.url in output)
self.assertTrue(u'href="something?chapter=1&amp;sect=2&amp;copy=3&amp;lang=en"' in output)
self.assertFalse(unicode(field) in output)
self.assertTrue(u'something&lt;div onclick=&quot;alert(&#39;oops&#39;)&quot;&gt;.jpg' in output)
self.assertTrue(u'my&lt;div&gt;file' in output)
self.assertFalse(u'my<div>file' in output)
def test_clear_input_renders_only_if_not_required(self):
"""
A ClearableFileInput with is_required=False does not render a clear