Feeds

WordPress bug resets admin password

Fixed for now

Protecting users from Firesheep and other Sidejacking attacks with SSL

This story was updated to correct details of the bug. It allows attackers to reset passwords, but not take over accounts.

Developers of the widely used WordPress blogging software have released an update that fixes a vulnerability that let attackers reset the administrator password.

The bug in version 2.8.3 is trivial to exploit remotely using nothing more than a web browser and a specially manipulated link. Using the special URL, the old password is removed and a new one generated in its place with no confirmation required, according to this alert published on the Full-Disclosure mailing list.

The flaw lurks in some of the PHP code that fails to properly scrutinize user input when the password reset feature is invoked. Exploiting it is as easy is directing a web browser to a link that looks something like:

http://domain_name.tld/wp-login.php?action=rp&key[]=

According to WordPress documentation here, the bug has been fixed by changing a single line of code so the program checks to make sure the input supplied for the new password isn't an array. If it is, the user gets an error message and must try again. After this article was first published, version 2.8.4 was released.

That would appear to be the end of it, but security researchers Rafal Los and Mike Bailey wonder aloud here whether it would have made more sense to check instead whether the input is a string.

"Hasty coding?" he asks. "Why take the blacklist vs. whitelist approach?"

After this article was first published, WordPress documentation showed the suggestion from Los and Bailey was being formally adopted.

The bigger point he and other observers seem to make is that PHP is the coding equivalent of an everyman's jet pack. It allows him to quickly soar into the sky with a minimal amount of training but doesn't necessarily provide the means to check for buildings, planes or other hazards that may greet the user once he gets there.

Of course, all languages are only as good as the person using them. But it's worth posing such questions to anything that's standing between your website and the people out to get it.

Additional details and analysis from Sans and Heise here and here. ®

The next step in data security

More from The Register

next story
Israeli spies rebel over mass-snooping on innocent Palestinians
'Disciplinary treatment will be sharp and clear' vow spy-chiefs
Infosec geniuses hack a Canon PRINTER and install DOOM
Internet of Stuff securo-cockups strike yet again
THREE QUARTERS of Android mobes open to web page spy bug
Metasploit module gobbles KitKat SOP slop
'Speargun' program is fantasy, says cable operator
We just might notice if you cut our cables
Apple Pay is a tidy payday for Apple with 0.15% cut, sources say
Cupertino slurps 15 cents from every $100 purchase
YouTube, Amazon and Yahoo! caught in malvertising mess
Cisco says 'Kyle and Stan' attack is spreading through compromised ad networks
Hackers pop Brazil newspaper to root home routers
Step One: try default passwords. Step Two: Repeat Step One until success
Greater dev access to iOS 8 will put us AT RISK from HACKERS
Knocking holes in Apple's walled garden could backfire, says securo-chap
prev story

Whitepapers

Providing a secure and efficient Helpdesk
A single remote control platform for user support is be key to providing an efficient helpdesk. Retain full control over the way in which screen and keystroke data is transmitted.
Saudi Petroleum chooses Tegile storage solution
A storage solution that addresses company growth and performance for business-critical applications of caseware archive and search along with other key operational systems.
Security and trust: The backbone of doing business over the internet
Explores the current state of website security and the contributions Symantec is making to help organizations protect critical data and build trust with customers.
Reg Reader Research: SaaS based Email and Office Productivity Tools
Read this Reg reader report which provides advice and guidance for SMBs towards the use of SaaS based email and Office productivity tools.
Security for virtualized datacentres
Legacy security solutions are inefficient due to the architectural differences between physical and virtual environments.