* If a userdir is configured, links to pages in it can be made without

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

diff --git a/doc/security.mdwn b/doc/security.mdwn
index dc763ef40a01bbae7d0f7ec09a3b8d08130dee89..72ae8f4b90a88dfe160261b56010ae46c6cb5a1f 100644 (file)
--- 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
@@ -16,7 +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.
+this would be to limit web commits to those done by a certain user.
 
 ## other stuff to look at
 
@@ -78,7 +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.
@@ -134,7 +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
 
@@ -154,6 +158,20 @@ 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
 
 _(Unless otherwise noted, these were discovered and immediately fixed by the
@@ -254,3 +272,10 @@ 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.