WordPress blogs at risk from worm
Summary
Topics
The worm can be tough to catch, as Mullenweg explains: "It registers a user, uses a security bug (fixed earlier in the year) to allow evaluated code to be executed through the permalink structure, makes itself an admin, then uses JavaScript to hide itself when you look at users page, attempts to clean up after itself, then goes quiet so you never notice while it inserts hidden spam and malware into your old posts."
The vulnerability allowing the attack was discovered on August 11, at which point WordPress encouraged users to upgrade to version 2.8.4. However, many people have yet to upgrade, and reports online indicate the worm is making progress by the hour.
The worm does not affect the current version 2.8.4 and the one prior to it, and it only affects people who host their own WordPress blog. Blogs hosted on WordPress.com are unaffected.
Users can find upgrade links and instructions on WordPress.org. WordPress has also posted an FAQ for people who think their blog has been hacked.
This article was originally posted on CNET News.
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As an admin, I check out all WP installations via subversion, and keep them all in an array in a shell script. I can upgrade 125 WP installations in 5 minutes flat (and only 15 seconds of that time is me with hands on keyboard). If you manage a lot of WP installs, I really recommend this approach. Here are the scripts I use to do this:
http://birdhouse.org/software/2008/04/wp-create/
http://birdhouse.org/software/2007/07/wp-mass-upgrade/
Joomla is another one that can be a bear to straighten out after and upgrade. Thank goodness older versions of apache can be safely run without needing to upgrade the whole thing...
I wish I could install just one copy of any given application and then that become available for all sites in a server. The one-copy-per-site is a bit hard to maintain when the site owner is not his/her own admin.
Regards,
MV
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