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25 lines
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25 lines
1.1 KiB
Plaintext
===========================
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Django 1.6.11 release notes
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===========================
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*March 18, 2015*
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Django 1.6.11 fixes two security issues in 1.6.10.
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Denial-of-service possibility with ``strip_tags()``
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===================================================
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Last year :func:`~django.utils.html.strip_tags` was changed to work
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iteratively. The problem is that the size of the input it's processing can
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increase on each iteration which results in an infinite loop in
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``strip_tags()``. This issue only affects versions of Python that haven't
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received `a bugfix in HTMLParser <http://bugs.python.org/issue20288>`_; namely
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Python < 2.7.7 and 3.3.5. Some operating system vendors have also backported
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the fix for the Python bug into their packages of earlier versions.
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To remedy this issue, ``strip_tags()`` will now return the original input if
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it detects the length of the string it's processing increases. Remember that
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absolutely NO guarantee is provided about the results of ``strip_tags()`` being
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HTML safe. So NEVER mark safe the result of a ``strip_tags()`` call without
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escaping it first, for example with :func:`~django.utils.html.escape`.
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