web commit by bremner: me too request for the tag generating code

[git.ikiwiki.info.git] / doc / security.mdwn

diff --git a/doc/security.mdwn b/doc/security.mdwn
index d834aa1a5e726deb51790fb5454d58cf77407db5..723daeccc4afa9a635f2bc0bd3dede11e1244eb6 100644 (file)
--- a/doc/security.mdwn
+++ b/doc/security.mdwn
@@ -47,6 +47,13 @@ Users with only web commit access are limited to editing pages as ikiwiki
 doesn't support file uploads from browsers (yet), so they can't exploit
 this.
 
 doesn't support file uploads from browsers (yet), so they can't exploit
 this.
 

+It is possible to embed an image in a page edited over the web, by using
+`img src="data:image/png;"`. Ikiwiki's htmlscrubber only allows `data:`
+urls to be used for `image/*` mime types. It's possible that some broken
+browser might ignore the mime type and if the data provided is not an
+image, instead run it as javascript, or something evil like that. Hopefully
+not many browsers are that broken.
+

 ## multiple accessors of wiki directory
 
 If multiple people can directly write to the source directory ikiwiki is
 ## multiple accessors of wiki directory
 
 If multiple people can directly write to the source directory ikiwiki is


@@ -349,9 +356,13 @@ allow the security hole to be exploited.
 ## javascript insertion via uris
 
 The htmlscrubber did not block javascript in uris. This was fixed by adding
 ## javascript insertion via uris
 
 The htmlscrubber did not block javascript in uris. This was fixed by adding

-a whitelist of valid uri types, which does not include javascript.
+a whitelist of valid uri types, which does not include javascript. 
+([[cve CVE-2008-0809]]) Some urls specifyable by the meta plugin could also
+theoretically have been used to inject javascript; this was also blocked
+([[cve CVE-2008-0808]]).

 
 This hole was discovered on 10 February 2008 and fixed the same day
 
 This hole was discovered on 10 February 2008 and fixed the same day

-with the release of ikiwiki 2.31.1. A fix was also backported to Debian etch,
-as version 1.33.4. I recommend upgrading to one of these versions if your
-wiki can be edited by third parties.
+with the release of ikiwiki 2.31.1. (And a few subsequent versions..)
+A fix was also backported to Debian etch, as version 1.33.4. I recommend
+upgrading to one of these versions if your wiki can be edited by third
+parties.