X-Git-Url: http://git.vanrenterghem.biz/git.ikiwiki.info.git/blobdiff_plain/4a3dc37eafeb45b82c0452cca8a1328e974a583c..8db285ad7bd940d4eef082eac522c9f3dee58ae3:/doc/security.mdwn diff --git a/doc/security.mdwn b/doc/security.mdwn index b3af3db3e..52ef486e6 100644 --- a/doc/security.mdwn +++ b/doc/security.mdwn @@ -41,11 +41,12 @@ who's viewing the wiki, that can be a security problem. Of course nobody else seems to worry about this in other wikis, so should we? -Currently only people with direct commit access can upload such files +People with direct commit access can upload such files (and if you wanted to you could block that with a pre-commit hook). -Users with only web commit access are limited to editing pages as ikiwiki -doesn't support file uploads from browsers (yet), so they can't exploit -this. + +The attachments plugin is not enabled by default. If you choose to +enable it, you should make use of its powerful abilities to filter allowed +types of attachments, and only let trusted users upload. It is possible to embed an image in a page edited over the web, by using `img src="data:image/png;"`. Ikiwiki's htmlscrubber only allows `data:` @@ -390,10 +391,20 @@ pre-emtively guard against that, current versions of ikiwiki store password hashes (using Eksblowfish). If you use the [[plugins/passwordauth]] plugin, I recommend upgrading to -ikiwiki 2.48, installing the [[Authen::Passphrase]] perl module, and running +ikiwiki 2.48, installing the [[cpan Authen::Passphrase]] perl module, and running `ikiwiki-transition hashpassword` to replace all existing cleartext passwords with strong blowfish hashes. You might also consider changing to [[plugins/openid]], which does not require ikiwiki deal with passwords at all, and does not involve users sending passwords in cleartext over the net to log in, either. + +## Empty password security hole + +This hole allowed ikiwiki to accept logins using empty passwords, to openid +accounts that didn't use a password. It was introduced in version 1.34, and +fixed in version 2.48. The [bug](http://bugs.debian.org/483770) was +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.