X-Git-Url: http://git.vanrenterghem.biz/git.ikiwiki.info.git/blobdiff_plain/2c0b310cc208b08fded4fe7e80cc3efbc4112c56..5813066cdccb6b5db23624ead63a5b103284218e:/doc/security.mdwn?ds=sidebyside

diff --git a/doc/security.mdwn b/doc/security.mdwn
index b3b5b6f3e..72ae8f4b9 100644
--- a/doc/security.mdwn
+++ b/doc/security.mdwn
@@ -6,6 +6,8 @@ security issues with this program than with cat(1). If, however, you let
 others edit pages in your wiki, then some possible security issues do need
 to be kept in mind.
 
+[[toc levels=2]]
+
 ----
 
 # Probable holes
@@ -16,15 +18,7 @@ _(The list of things to fix.)_
 
 Anyone with direct commit access can forge "web commit from foo" and
 make it appear on [[RecentChanges]] like foo committed. One way to avoid
-this would be to limit web commits to those done by a certian user.
-
-## XML::Parser
-
-XML::Parser is used by the aggregation plugin, and has some security holes
-that are still open in Debian unstable as of this writing. #378411 does not
-seem to affect our use, since the data is not encoded as utf-8 at that
-point. #378412 could affect us, although it doesn't seem very exploitable.
-It has a simple fix, which should be NMUed or something..
+this would be to limit web commits to those done by a certain user.
 
 ## other stuff to look at
 
@@ -86,7 +80,7 @@ they can try to use this to exploit your web server.
 
 _(AKA, the assumptions that will be the root of most security holes...)_
 
-## exploting ikiwiki with bad content
+## exploiting ikiwiki with bad content
 
 Someone could add bad content to the wiki and hope to exploit ikiwiki.
 Note that ikiwiki runs with perl taint checks on, so this is unlikely.
@@ -142,7 +136,9 @@ file not be world readable.
 
 Login to the wiki involves sending a password in cleartext over the net.
 Cracking the password only allows editing the wiki as that user though.
-If you care, you can use https, I suppose.
+If you care, you can use https, I suppose. If you do use https either for
+all of the wiki, or just the cgi access, then consider using the sslcookie
+option.
 
 ## XSS holes in CGI output
 
@@ -153,6 +149,27 @@ with a username containing html code (anymore).
 It's difficult to know for sure if all such avenues have really been
 closed though.
 
+## HTML::Template security
+
+If the [[plugins/template]] plugin is enabled, users can modify templates
+like any other part of the wiki. This assumes that HTML::Template is secure
+when used with untrusted/malicious templates. (Note that includes are not
+allowed, so that's not a problem.)
+
+----
+
+# Plugins
+
+The security of [[plugins]] depends on how well they're written and what
+external tools they use. The plugins included in ikiwiki are all held to
+the same standards as the rest of ikiwiki, but with that said, here are
+some security notes for them.
+
+* The [[plugins/img]] plugin assumes that imagemagick/perlmagick are secure
+  from malformed image attacks. Imagemagick has had security holes in the
+  past. To be able to exploit such a hole, a user would need to be able to
+  upload images to the wiki.
+
 ----
 
 # Fixed holes
@@ -246,3 +263,19 @@ have come just before yours, by forging svn log output. This was
 guarded against by using svn log --xml.
 
 ikiwiki escapes any html in svn commit logs to prevent other mischief.
+
+## XML::Parser
+
+XML::Parser is used by the aggregation plugin, and has some security holes. 
+Bug #[378411](http://bugs.debian.org/378411) does not
+seem to affect our use, since the data is not encoded as utf-8 at that
+point. #[378412](http://bugs.debian.org/378412) could affect us, although it
+doesn't seem very exploitable. It has a simple fix, and has been fixed in
+Debian unstable.
+
+## include loops
+
+Various directives that cause one page to be included into another could
+be exploited to DOS the wiki, by causing a loop. Ikiwiki has always guarded
+against this one way or another; the current solution should detect all
+types of loops involving preprocessor directives.