Announce 3.20161219

doc/news/version_3.20150614.mdwn

@@ -1,8 +0,0 @@
-ikiwiki 3.20150614 released with [[!toggle text="these changes"]]
-[[!toggleable text="""
-   * inline: change default sort order from age to "age title" for
-     determinism, partially fixing deterministic build for git-annex,
-     ikiwiki-hosting etc. (Closes: #[785757](http://bugs.debian.org/785757))
-   * img: avoid ImageMagick misinterpreting filenames containing a colon
-   * img test: set old timestamp on source file that will change, so that
-     the test will pass even if it takes less than 1 second"""]]

doc/news/version_3.20161219.mdwn

@@ -0,0 +1,14 @@
+ikiwiki 3.20161219 released with [[!toggle text="these changes"]]
+[[!toggleable text="""
+ * [ Joey Hess ]
+   * inline: Prevent creating a file named ".mdwn" when the
+     postform is submitted with an empty title.
+ * [ Simon McVittie ]
+   * Security: tell `git revert` not to follow renames. If it does, then
+     renaming a file can result in a revert writing outside the wiki srcdir
+     or altering a file that the reverting user should not be able to alter,
+     an authorization bypass. Thanks, intrigeri
+   * cgitemplate: remove some dead code. Thanks, blipvert
+   * Restrict CSS matches against header class to not break
+     Pandoc tables with header rows. Thanks, karsk
+   * Make pagestats output more deterministic. Thanks, intrigeri"""]]

doc/security.mdwn

@@ -546,3 +546,20 @@ vulnerability to execute arbitrary Perl code. An upgrade is recommended
 for sites where an untrusted user is able to attach files with arbitrary
 names and/or run a setuid ikiwiki wrapper with a working directory of
 their choice.
+
+## Editing restriction bypass for git revert
+
+intrigeri discovered that a web or git user could revert a change to a
+page they are not allowed to edit, if the change being reverted was made
+before the page was moved from a location where that user had permission
+to edit it. For example, if a file is moved from `drafts/policy.mdwn`
+(editable by less-trusted users) to `policy.mdwn` (only editable
+by more-trusted users), a less-trusted user could revert a change
+that was made to `drafts/policy.mdwn` prior to that move, and it would
+result in `policy.mdwn` being altered.
+
+This affects sites with the `git` VCS and the `recentchanges` plugin,
+which are both used in most ikiwiki installations.
+
+This bug was reported on 2016-12-17. The fixed version 3.20161219
+was released on 2016-12-19.