Twitter onMouseOver XSS Exploit Causes Chaos


The big news yesterday was an epic XSS flaw on Twitter that sent the micro-blogging service into chaos. They actually made an announcement during the hack that users should stay off the web-site and use 3rd party services through the API (Software such as Tweetdeck, Seesmic, Gravity etc).

They posted an update on the status blog pretty fast that the XSS had been identified and they were in the midst of patching it.

Hackers have exploited a flaw in Twitter, which results in pop-ups and third-party websites being opened despite users simply hovering over links with their mouse.

Hundred of Twitter users, including Sarah Brown – wife of the former Labour Prime Minister Gordon Brown – have fallen victim to the attack. In some cases the third-party websites that are open are pornographic. The malicious links contain Javascript code, called onMouseOver, which allows users to redirected, even if they haven’t clicked on the link.

Graham Cluely from security firm Sophos said in a blog that at present the flaw is being exploited for “fun and games” although “there is obviously the potential for cybercriminals to redirect users to third-party websites containing malicious code, or for spam advertising pop-ups to be displayed”.

Cluley advised Twitter users to avoid using the Twitter website and instead rely on a third-party client such as Tweetdeck to access the service.

Most ‘attacks’ were pretty harmless with users just having fun with the bug, there were some pretty dodgy incidents though involving shocks sites (goatse or tubgirl anyone?) and hardcore porn sites.

There’s also a good write-up on the Sophos blog here with screen-shots:

Twitter ‘onmouseover’ security flaw widely exploited

A full post on the issue from Twitter is available here:

All about the “onMouseOver” incident

I like how they are responsible about such things and don’t try to hide them. If you are on Twitter and you want the latest updates about such matters you should follow the @safety account.

Source: Network World

Posted in: Exploits/Vulnerabilities, Malware, Web Hacking

, , , , , ,


Latest Posts:


Axiom - Pen-Testing Server For Collecting Bug Bounties Axiom – Pen-Testing Server For Collecting Bug Bounties
Project Axiom is a set of utilities for managing a small dynamic infrastructure setup for bug bounty, basically a pen-testing server out of the box with 1-line.
Quasar RAT - Windows Remote Administration Tool Quasar RAT – Windows Remote Administration Tool
Quasar is a fast and light-weight Windows remote administration tool coded in C#. Used for user support through day-to-day administrative work to monitoring.
Pingcastle - Active Directory Security Assessment Tool Pingcastle – Active Directory Security Assessment Tool
PingCastle is a Active Directory Security Assessment Tool designed to quickly assess the Active Directory security level based on a risk and maturity framework.
Second Order - Subdomain Takeover Scanner Tool Second Order – Subdomain Takeover Scanner Tool
Second Order Subdomain Takeover Scanner Tool scans web apps for second-order subdomain takeover by crawling the application and collecting URLs (and other data)
Binwalk - Firmware Security Analysis & Extraction Tool Binwalk – Firmware Security Analysis & Extraction Tool
Binwalk is a fast and easy to use Python-based firmware security analysis tool that allows for firmware analysis, reverse engineering & extracting of firmware.
zBang - Privileged Account Threat Detection Tool zBang – Privileged Account Threat Detection Tool
zBang is a risk assessment tool for Privileged Account Threat Detection on a scanned network, organizations & red teams can use it to identify attack vectors


Comments are closed.