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119 lines
4.7 KiB
Plaintext
119 lines
4.7 KiB
Plaintext
kses ChangeLog
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==============
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* 0.2.1
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0.2.1 was released on the 29th of September 2003.
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It has the following changes:
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- There is now an additional version of kses, using the object-oriented
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paradigm. Thanks a lot to Richard R. Vasquez, Jr., who created it! Anyone
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who wants to make functional programming, logical programming or spaghetti
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programming versions of kses as well (or any other programming paradigm that
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you like), go ahead! All the people who like old procedural programming for
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web applications shouldn't despair, though, as both versions will be
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maintained with each release.
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- kses now has some new attribute value checks: minlen, minval and valueless.
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See docs/attribute-value-checks for an explanation.
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- For some reason, the Opera developers decided to make chr(173) a whitespace
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character in URL protocols, both when it occurs raw and in an entity. kses
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now handles this.
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- The URL protocol whitelisting system now decodes entities before removing
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NULLs and whitespaces.
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* 0.2.0
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0.2.0 was released on the 25th of July 2003.
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It has the following changes:
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- kses now supports checking of attribute values, and not just element names
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and attribute names. The attribute value checks that exist so far are
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'maxlen' (checks how long attribute values are, to avoid Buffer Overflows)
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and 'maxval' (checks how big an integer value is, to avoid Denial of Service
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attacks).
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Buffer Overflows could both be a problem for WWW clients and different
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servers on the Internet that an HTML document links to. One example is
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<frame src="ftp://ftp.v1ct1m.com/AAAAAA..thousands_of_A's...">.
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Denial of Service attacks can take the form of too big sizes of iframes or
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other things. One example is <iframe src="http://some.web.server/"
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width="20000" height="2000">, which makes some client machines completely
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overloaded.
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- kses' old feature of removing "javascript:" from attribute values has been
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improved. It now has a whole system for white listing of URL protocols, so
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you can specify that it's acceptable with http:, https:, ftp: and gopher:,
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but no other protocols in attribute values. The system tries pretty hard to
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do the right thing with whitespace, upper/lower case, HTML entities
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("javascript:") and repeated entries ("javascript:javascript:alert(57)").
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- kses now supports both HTML and XHTML code, by allowing " /" at the end of
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tags.
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- kses now removes Netscape 4's JavaScript entities, having the form
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"&{alert(57)};". They don't even seem to work on all versions of Netscape 4,
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but for completeness' sake it seemed like a good feature to add.
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- A bug with NULLs in javascript: URLs was fixed.
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(Reported by Simon Cornelius P. Umacob - thanks!)
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- As a nice side effect of the white listing of URL protocols, kses now also
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normalizes all HTML entities in documents. It will change HTML code with bad
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entities to the right form, for example "AT&T" will be converted to
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"AT&T" and "<a href='lyrics.php?band=ladytron&lyrics=playgirl'>" will be
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converted to "<a href='lyrics.php?band=ladytron&lyrics=playgirl'>".
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":" will be converted to ":", "&#XYZZY;" will be converted to
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"&#XYZZY;", "ä!;" will be converted to "&auml!;" and so on.
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As shown above, it will process HTML entities that it doesn't understand.
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It will also deal with too big numbers in numeric HTML entities, which is
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helpful as many browsers seem to wrap them around at 2 ** 32, so the
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characters 58, 58 + (2 ** 32), 58 + (2 ** 64) etcetera are all colons to the
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web browser.
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- You can now use upper case letters in your $allowed_html array, in element
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names, attribute names and attribute value check names. Version 0.1.0
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required everything in that array to be in lower case, but that's not
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necessary any more. You can also use upper case letters in
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$allowed_protocols.
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- The "Really malformed thing" bug from the TODO file was fixed.
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It used to convert this string:
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x > 5 <a href="blah">
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to:
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x > 5 <a href="blah">
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and now it converts it to:
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x > 5 <a href="blah">
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- The "Weird malformed thing" bug from the TODO file was fixed.
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It used to convert this string:
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<a href="5 href=6>
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to:
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<a href="6">
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because of the way kses restarts after a parse error in kses_hair(). Now it
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converts it to:
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<a>
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- A problem with slashes in HTML tags was fixed.
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- examples/filter.php used to use $SCRIPT_NAME, which doesn't work on
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Windows.
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(Reported by Simon Cornelius P. Umacob - thanks!)
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- kses now allows dashes in attribute names, for things like
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<meta http-equiv=..>.
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* 0.1.0, first public version
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0.1.0 was released on the 9th of June 2003.
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It was announced on three security related mailing lists on Friday the 13th
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of June (nothing bad happened to it though).
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