X-Git-Url: http://git.vanrenterghem.biz/git.ikiwiki.info.git/blobdiff_plain/47d179802d5f78365fa7077ae64de35f2892a1e4..0c3f59d33aa6af6c327d863a4110337ac9cae898:/doc/security.mdwn diff --git a/doc/security.mdwn b/doc/security.mdwn index 498d2b4e7..21aef316b 100644 --- a/doc/security.mdwn +++ b/doc/security.mdwn @@ -66,8 +66,7 @@ So it's best if only one person can ever directly write to those directories. ## setup files Setup files are not safe to keep in the same revision control repository -with the rest of the wiki. Just don't do it. [[ikiwiki.setup]] is *not* -used as the setup file for this wiki, BTW. +with the rest of the wiki. Just don't do it. ## page locking can be bypassed via direct commits @@ -408,3 +407,35 @@ discovered on 30 May 2008 and fixed the same day. ([[!cve CVE-2008-0169]]) I recommend upgrading to 2.48 immediatly if your wiki allows both password and openid logins. + +## Malformed UTF-8 DOS + +Feeding ikiwiki page sources containing certian forms of malformed UTF-8 +can cause it to crash. This can potentially be used for a denial of service +attack. + +intrigeri discovered this problem on 12 Nov 2008 and a patch put in place +later that day, in version 2.70. The fix was backported to testing as version +2.53.3, and to stable as version 1.33.7. + +## Insufficient blacklisting in teximg plugin + +Josh Triplett discovered on 28 Aug 2009 that the teximg plugin's +blacklisting of insecure TeX commands was insufficient; it could be +bypassed and used to read arbitrary files. This was fixed by +enabling TeX configuration options that disallow unsafe TeX commands. +The fix was released on 30 Aug 2009 in version 3.1415926, and was +backported to stable in version 2.53.4. If you use the teximg plugin, +I recommend upgrading. ([[!cve CVE-2009-2944]]) + +## javascript insertion via svg uris + +Ivan Shmakov pointed out that the htmlscrubber allowed `data:image/*` urls, +including `data:image/svg+xml`. But svg can contain javascript, so that is +unsafe. + +This hole was discovered on 12 March 2010 and fixed the same day +with the release of ikiwiki 3.20100312. +A fix was also backported to Debian etch, as version 2.53.5. I recommend +upgrading to one of these versions if your wiki can be edited by third +parties.