Feeds

Yahoo! 0-day! exploit! hijacks! status! updates!

Right now I'm: spamming my contacts with malware links

Beginner's guide to SSL certificates

Security researchers have discovered an unpatched flaw in Yahoo! Messenger that allows miscreants to change any user's status message.

Hijacked status updates are a handy way to persuade a victim's contacts to click on a link and lead them to a dangerous website. Worse still, the bug in version 11.x of the Messenger client requires minimal user interaction to work, unlike previous exploits that relied on conning prospective marks.

The attacker sends a supposed file to a target that is actually an iframe that swaps the status message for the attacker's customised text, as explained in a blog post by net security firm BitDefender here. The message might be, and in most attack scenarios would be, sent firm outside a targeted user's contact list.

If successfully executed, a victim will have no indication that his or her status message has been rewritten. The ruse might be used to gain affiliate incomes by promoting dodgy sites as well as directing users towards sites loaded with exploits or scareware scams.

Bitdefender said it has notified Yahoo about the vulnerability. Attacks based on the as yet unfixed flaw have already been detected in the wild, the Romanian security firm warns.

It advises users to change the setting of their IM client to “ignore anyone who is not in your Yahoo! Contacts" (which is off by default) as a precaution pending the release of a patch. In addition, some security suites include a web filter function that ought to defend users from this attack. ®

Protecting users from Firesheep and other Sidejacking attacks with SSL

More from The Register

next story
Spies would need SUPER POWERS to tap undersea cables
Why mess with armoured 10kV cables when land-based, and legal, snoop tools are easier?
Early result from Scots indyref vote? NAW, Jimmy - it's a SCAM
Anyone claiming to know before tomorrow is telling porkies
Jihadi terrorists DIDN'T encrypt their comms 'cos of Snowden leaks
Intel bods' analysis concludes 'no significant change' after whistle was blown
Israeli spies rebel over mass-snooping on innocent Palestinians
'Disciplinary treatment will be sharp and clear' vow spy-chiefs
TOR users become FBI's No.1 hacking target after legal power grab
Be afeared, me hearties, these scoundrels be spying our signals
Hackers pop Brazil newspaper to root home routers
Step One: try default passwords. Step Two: Repeat Step One until success
China hacked US Army transport orgs TWENTY TIMES in ONE YEAR
FBI et al knew of nine hacks - but didn't tell TRANSCOM
Microsoft to patch ASP.NET mess even if you don't
We know what's good for you, because we made the mess says Redmond
NORKS ban Wi-Fi and satellite internet at embassies
Crackdown on tardy diplomatic sysadmins providing accidental unfiltered internet access
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.
WIN a very cool portable ZX Spectrum
Win a one-off portable Spectrum built by legendary hardware hacker Ben Heck
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.
Protecting users from Firesheep and other Sidejacking attacks with SSL
Discussing the vulnerabilities inherent in Wi-Fi networks, and how using TLS/SSL for your entire site will assure security.
Security for virtualized datacentres
Legacy security solutions are inefficient due to the architectural differences between physical and virtual environments.