Untested backport to Ubuntu trusty.

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

diff --git a/doc/security.mdwn b/doc/security.mdwn
index afefd1bc300eb4d18811c42f72931d9dfd7b7860..6d4841fe6f258d25eeb077dc0a650bfd35b25422 100644 (file)
--- a/doc/security.mdwn
+++ b/doc/security.mdwn
@@ -178,7 +178,8 @@ 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
 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
+  from malformed image attacks for at least the formats listed in
+  `img_allowed_formats`. 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.
 
   past. To be able to exploit such a hole, a user would need to be able to
   upload images to the wiki.
 


@@ -497,3 +498,31 @@ Raúl Benencia discovered an additional XSS exposure in the meta plugin.
 This hole was discovered on 16 May 2012 and fixed the same day with
 the release of ikiwiki 3.20120516. A fix was backported to Debian squeeze,
 as version 3.20100815.9. An upgrade is recommended for all sites.
 This hole was discovered on 16 May 2012 and fixed the same day with
 the release of ikiwiki 3.20120516. A fix was backported to Debian squeeze,
 as version 3.20100815.9. An upgrade is recommended for all sites.

+
+## XSS via openid selector
+
+Raghav Bisht discovered this XSS in the openid selector. ([[!cve CVE-2015-2793]])
+
+The hole was reported on March 24th, a fix was developed on March 27th,
+and the fixed version 3.20150329 was released on the 29th. A fix was backported
+to Debian jessie as version 3.20141016.2 and to Debian wheezy as version
+3.20120629.2. An upgrade is recommended for sites using CGI and openid.
+
+## XSS via error messages
+
+CGI error messages did not escape HTML meta-characters, potentially
+allowing an attacker to carry out cross-site scripting by directing a
+user to a URL that would result in a crafted ikiwiki error message. This
+was discovered on 4 May by the ikiwiki developers, and the fixed version
+3.20160506 was released on 6 May. An upgrade is recommended for sites using
+the CGI.
+
+## ImageMagick CVE-2016–3714 ("ImageTragick")
+
+ikiwiki 3.20160506 attempts to mitigate [[!cve CVE-2016-3714]] and any
+future ImageMagick vulnerabilities that resemble it, by restricting the
+image formats that the [[ikiwiki/directive/img]] directive is willing to
+resize. An upgrade is recommended for sites where an untrusted user is
+able to attach images. Upgrading ImageMagick to a version where
+CVE-2016-3714 has been fixed is also recommended, but at the time of
+writing no such version is available.