Feeds

Rackspace patches Windows Updater vuln

Get patching lest this remote execution problem bite you somewhere cloudy

Build a business case: developing custom apps

Rackspace has patched an arbitrary code execution bug in its Windows environment, following an advisory from CloudPassage.

CloudPassage discovered that the Rackspace Windows Agent and Updater allowed unauthenticated users to upload a modified version of the agent binary to Rackspace Cloud Server instances. The modified code would then be treated as a normal update: when the service restarts after the update, an attacker could then execute arbitrary code.

As explained by CloudPassage, the Rackspace-written Windows Agent and Updater handle boot config for Windows guests running on the Xen hypervisor, running as services under the LocalSystem account.

Pre-1.2.6.0 Updater versions allowed unsigned updates using a crafted .NET call to Port 1984 (El Reg presumes the port number is pure coincidence), which sends a .NET serialisable object with a URL and MD5 checksum to the target. The target system would then download a zipfile, check it against the checksum, extract it into the program folder of the Agent service, and restart the service. As its proof-of-concept, CloudPassage used the und3auth tool to put a backdoor into the Agent binary.

The fixed Updater no longer listens on Port 1984, and uses IPC with XenStore. ®

The essential guide to IT transformation

More from The Register

next story
Rupert Murdoch says Google is worse than the NSA
Mr Burns vs. The Chocolate Factory, round three!
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?
Know what Ferguson city needs right now? It's not Anonymous doxing random people
U-turn on vow to identify killer cop after fingering wrong bloke
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
e-Borders fiasco: Brits stung for £224m after US IT giant sues UK govt
Defeat to Raytheon branded 'catastrophic result'
prev story

Whitepapers

Endpoint data privacy in the cloud is easier than you think
Innovations in encryption and storage resolve issues of data privacy and key requirements for companies to look for in a solution.
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.
Top 8 considerations to enable and simplify mobility
In this whitepaper learn how to successfully add mobile capabilities simply and cost effectively.
Solving today's distributed Big Data backup challenges
Enable IT efficiency and allow a firm to access and reuse corporate information for competitive advantage, ultimately changing business outcomes.
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.