Vulnerability in Yahoo allowed Egyptian hacker to delete more than 1 million and half records from Yahoo database. Yahoo immediately fixed it.
The Egyptian cyber security expert Ibrahim Raafat has discovered a serious flaw in the Yahoo!website.
The hacker demonstrated on his blog how to exploit the “Insecure Direct Object Reference Vulnerability” vulnerability in the Yahoo! sub-domain (suggestions.yahoo.com) to delete all the posted thread and comments on Yahoo’s Suggestion Board website.
As demonstrated by Raafat it is possible to escalate user privileges that allow a hacker to delete more than 365,000 posts and 1,155,000 comments from Yahoo! Database. Following the video Proof-of-Concept for the Yahoo! vulnerability.
It is not first time that hackers discover a serious flaw in the websites managed by the company, last year for example another Egyptian experts, Ebrahim Hegazy @Zigoo0), has found Blind SQL Injection could lead to data leakage.
Technical details on how to exploit the flaw to delete comments and posts are available in the post published by the expert.
Ibrahim, while deleting his comment, has noticed the HTTP Header of POST request, i.e.
Pierluigi Paganini is member of the ENISA (European Union Agency for Network and Information Security) Threat Landscape Stakeholder Group and Cyber G7 Group, he is also a Security Evangelist, Security Analyst and Freelance Writer.
Editor-in-Chief at "Cyber Defense Magazine", Pierluigi is a cyber security expert with over 20 years experience in the field, he is Certified Ethical Hacker at EC Council in London. The passion for writing and a strong belief that security is founded on sharing and awareness led Pierluigi to find the security blog "Security Affairs" recently named a Top National Security Resource for US.
Pierluigi is a member of the "The Hacker News" team and he is a writer for some major publications in the field such as Cyber War Zone, ICTTF, Infosec Island, Infosec Institute, The Hacker News Magazine and for many other Security magazines.
Author of the Books "The Deep Dark Web" and “Digital Virtual Currency and Bitcoin”.