The Hacker News Logo
Subscribe to Newsletter

The Hacker News - Cybersecurity News and Analysis: Script Execution

Critical vulnerability in Twitter allows attacker to upload Unrestricted Files

Critical vulnerability in Twitter allows attacker to upload Unrestricted Files

October 30, 2013Anonymous
Security expert Ebrahim Hegazy , Cyber Security Analyst Consultant at Q-CERT, has found a serious vulnerability in Twitter that allows an attacker to upload files of any extension including PHP. When an application does not validate or improperly validates file types before uploading files to the system, called Unrestricted File upload vulnerability . Such flaws allow an attacker to upload and execute arbitrary code on the target system which could result in execution of arbitrary HTML and script code or system compromise. According to Ebrahim, when a developer creates a new application for Twitter  i.e. dev.twitter.com - they have an option to upload an image for that application. While uploading the image, the Twitter server will check for the uploaded files to accept certain image extensions only, like PNG, JPG and other extensions won't get uploaded. But in a Video Proof of Concept he demonstrated  that, a vulnerability allowed him to bypass this security validation
Script Execution flaw in Google drive poses security threat

Script Execution flaw in Google drive poses security threat

March 15, 2013Mohit Kumar
Once again Google Security Team Shoot itself in the foot. Ansuman Samantaray , an Indian penetration tester discovered a small, but creative Security flaw in Google drive that poses phishing threat to million of Google users was ignored  by Google Security team by replying that," It is just a mare phishing attempt,not a bug in Google ". According to Ansuman , he reported a JavaScript Script Execution vulnerability in Google Drive Files on 20th December 2012 to Google Security Team and but Google rejected the report on 21st December. Ability to execute malicious script through Google drive files poses security threats, not just phishing attack, but an attacker able to extends the attack to malware spreading, etc. The flaw exist in the way Google Drive preview the documents in the browser. Online preview of the files executing code written in doc files as HTML/JavaScript just by changing the value of a parameter called " export " in the URL. ie.  
Online Courses and Software

Sign up for cybersecurity newsletter and get latest news updates delivered straight to your inbox daily.