Feeds

vBulletin vuln opens backdoor to rogue accounts

The workaround is easy, though

The essential guide to IT transformation

The widespread vBulletin CMS has a vulnerability that allows remote attackers to create new administrative accounts.

Back in August, users of versions in the 4.1+ and 5+ series were advised to delete the /install/ or /core/install/ directories (depending on version) as a workaround against the bug, but vBulletin didn't advise of the impact of the problem.

However, according to this article at Help Net Security, the vulnerability allows admin account injection using vulnerable PHP code.

A user whose site was compromised in September posted an Apache log that identified the attack source (below).

The vBulletin attack logs

The vulnerable upgrade.php resource is attacked to inject the unwanted administrative user account.

The author of the article, Barry Shteiman of Imperva, notes that the exploit code and technique were found on hacker forums, meaning that the exploit is in the wild.

If the vBulletin user can't, for some reason, delete the /install/ or /core/install/ directories, Shteiman advises that they implement redirects to block incoming requests trying to hit the upgrade.php file. ®

Next gen security for virtualised datacentres

More from The Register

next story
e-Borders fiasco: Brits stung for £224m after US IT giant sues UK govt
Defeat to Raytheon branded 'catastrophic result'
Snowden on NSA's MonsterMind TERROR: It may trigger cyberwar
Plus: Syria's internet going down? That was a US cock-up
Who needs hackers? 'Password1' opens a third of all biz doors
GPU-powered pen test yields more bad news about defences and passwords
Think crypto hides you from spooks on Facebook? THINK AGAIN
Traffic fingerprints reveal all, say boffins
Microsoft cries UNINSTALL in the wake of Blue Screens of Death™
Cache crash causes contained choloric calamity
Germany 'accidentally' snooped on John Kerry and Hillary Clinton
Dragnet surveillance picks up EVERYTHING, USA, m'kay?
prev story

Whitepapers

5 things you didn’t know about cloud backup
IT departments are embracing cloud backup, but there’s a lot you need to know before choosing a service provider. Learn all the critical things you need to know.
Implementing global e-invoicing with guaranteed legal certainty
Explaining the role local tax compliance plays in successful supply chain management and e-business and how leading global brands are addressing this.
Build a business case: developing custom apps
Learn how to maximize the value of custom applications by accelerating and simplifying their development.
Rethinking backup and recovery in the modern data center
Combining intelligence, operational analytics, and automation to enable efficient, data-driven IT organizations using the HP ABR approach.
Next gen security for virtualised datacentres
Legacy security solutions are inefficient due to the architectural differences between physical and virtual environments.