• Home
  • Cyber Crime
  • Cyber warfare
  • APT
  • Data Breach
  • Deep Web
  • Digital ID
  • Hacking
  • Hacktivism
  • Intelligence
  • Internet of Things
  • Laws and regulations
  • Malware
  • Mobile
  • Reports
  • Security
  • Social Networks
  • Terrorism
  • ICS-SCADA
  • POLICIES
  • Contact me
MUST READ

Cisco removed the backdoor account from its Unified Communications Manager

 | 

U.S. Sanctions Russia's Aeza Group for aiding crooks with bulletproof hosting

 | 

Qantas confirms customer data breach amid Scattered Spider attacks

 | 

CVE-2025-6554 is the fourth Chrome zero-day patched by Google in 2025

 | 

U.S. CISA adds TeleMessage TM SGNL flaws to its Known Exploited Vulnerabilities catalog

 | 

A sophisticated cyberattack hit the International Criminal Court

 | 

Esse Health data breach impacted 263,000 individuals

 | 

Europol dismantles €460M crypto scam targeting 5,000 victims worldwide

 | 

CISA and U.S. Agencies warn of ongoing Iranian cyber threats to critical infrastructure

 | 

U.S. CISA adds Citrix NetScaler flaw to its Known Exploited Vulnerabilities catalog

 | 

Canada bans Hikvision over national security concerns

 | 

Denmark moves to protect personal identity from deepfakes with new copyright law

 | 

Ahold Delhaize data breach affected over 2.2 Million individuals

 | 

Facebook wants access to your camera roll for AI photo edits

 | 

SECURITY AFFAIRS MALWARE NEWSLETTER ROUND 51

 | 

Security Affairs newsletter Round 530 by Pierluigi Paganini – INTERNATIONAL EDITION

 | 

The FBI warns that Scattered Spider is now targeting the airline sector

 | 

LapDogs: China-nexus hackers Hijack 1,000+ SOHO devices for espionage

 | 

Taking over millions of developers exploiting an Open VSX Registry flaw

 | 

OneClik APT campaign targets energy sector with stealthy backdoors

 | 
  • Home
  • Cyber Crime
  • Cyber warfare
  • APT
  • Data Breach
  • Deep Web
  • Digital ID
  • Hacking
  • Hacktivism
  • Intelligence
  • Internet of Things
  • Laws and regulations
  • Malware
  • Mobile
  • Reports
  • Security
  • Social Networks
  • Terrorism
  • ICS-SCADA
  • POLICIES
  • Contact me
  • Home
  • Breaking News
  • Hacking
  • Reconnect tool for hacking Facebook is publicly available

Reconnect tool for hacking Facebook is publicly available

Pierluigi Paganini March 11, 2015

The security expert Egor Homakov from Sakurity firm has released the Reconnect tool that allows hackers to hijack accounts on sites that use Facebook logins.

The security expert Security Egor Homakov has developed a hacking tool dubbed Reconnect that exploit a flaw in Facebook to hijack accounts on sites that use Facebook logins.

Homakov, with works for the pentesting company Sakurity, reported the flaw to Facebook a year ago, but the company doesn’t apply a fix to maintain compatibility with a vast number of websites that used the service of the social network giant for their login process.

Reconnect tool Faceboook

Reconnect exploits cross-site request forgery (CSRF) flaws impacting Facebook Login, which allows users to log-in to third-party websites via their Facebook accounts. Basically the vulnerability allows attackers to access victims accounts using Facebook application developed by third-party websites such as Mashable,Vimeo, About.me, Stumbleupon and many others.

“RECONNECT is a ready to use tool to hijack accounts on websites with Facebook Login, for example Booking.com, Bit.ly, About.me, Stumbleupon, Angel.co, Mashable.com, Vimeo and many others,” wrote Homakov in a blog post. “Feel free to copy and modify its source code. Facebook refused to fix this issue one year ago, unfortunately it’s time to take it to the next level and give blackhats this simple tool.”

Homakov published a blog post which provides step-by-step instructions for setting up rogue Facebook accounts that victims are redirected to when they tricked into clicking on malicious URLs generated by the attackers with the Reconnect tool.
The flaw abuses the lack of CSRF protection for the following processes:
  • Facebook log in
  • Facebook log out
  • Third-party account connection

Homakov explained that the first two issues “can be fixed by Facebook,” meanwhile the third one needs to be fixed by the website administrators that have integrated “Login with Facebook” feature into their websites.

“This bug abuses triple-CSRFs at once: CSRF on logout, CSRF on login and CSRF on account connection,” he wrote. “#1 and #2 can be fixed by Facebook, #3 must be fixed by website owners. But in theory all of these features must be protected from CSRF.”

The attack allows to link the Facebook account of the attacker to the victim account on the third-party site, in this way a bad actor is able to log into that account directly and change its settings (i.e. password, email addresses).

“Now our Facebook account is connected to the victim account on that website and we can log in that account directly to change email/password, cancel bookings, read private messages and so on,” said Homakov.

The attack is quite simple, as explained by Homakov, it works by creating a link that when clicked on logs the victim out of it account and into a Facebook account under the control of the attacker.

“It simply relogins you into attacker’s facebook account and connects attacker’s facebook to your account” states the expert.

Facebook said that that website developers using Login can prevent the Reconnect attack by following the best practices suggested by the company and using the ‘state’ parameter implemented for OAuth Login.

“We’ve also implemented several changes to help prevent login CSRF and are evaluating others while aiming to preserve necessary functionality for a large number of sites that rely upon Facebook Login,” the spokesperson noted.

Facebook provides a provided guidance to developers that want to integrate the feature in their websites.The flaw discovered by Homakov is a very serious issue due to the large number of websites that implements the feature.

To mitigate the exposure to possible attacks with the Reconnect tool it is suggested to avoid clicking suspicious URLs provided via emails, online messages or shared through social media.

Pierluigi Paganini

(Security Affairs –  Reconnect, Facebook)


facebook linkedin twitter

Cross-site Request Forgery CSRF Facebook Hacking Hijacking OAuth Login Reconnect

you might also like

Pierluigi Paganini July 02, 2025
Cisco removed the backdoor account from its Unified Communications Manager
Read more
Pierluigi Paganini July 02, 2025
U.S. Sanctions Russia's Aeza Group for aiding crooks with bulletproof hosting
Read more

leave a comment

newsletter

Subscribe to my email list and stay
up-to-date!

    recent articles

    Cisco removed the backdoor account from its Unified Communications Manager

    Security / July 02, 2025

    U.S. Sanctions Russia's Aeza Group for aiding crooks with bulletproof hosting

    Cyber Crime / July 02, 2025

    Qantas confirms customer data breach amid Scattered Spider attacks

    Cyber Crime / July 02, 2025

    CVE-2025-6554 is the fourth Chrome zero-day patched by Google in 2025

    Hacking / July 02, 2025

    U.S. CISA adds TeleMessage TM SGNL flaws to its Known Exploited Vulnerabilities catalog

    Hacking / July 02, 2025

    To contact me write an email to:

    Pierluigi Paganini :
    pierluigi.paganini@securityaffairs.co

    LEARN MORE

    QUICK LINKS

    • Home
    • Cyber Crime
    • Cyber warfare
    • APT
    • Data Breach
    • Deep Web
    • Digital ID
    • Hacking
    • Hacktivism
    • Intelligence
    • Internet of Things
    • Laws and regulations
    • Malware
    • Mobile
    • Reports
    • Security
    • Social Networks
    • Terrorism
    • ICS-SCADA
    • POLICIES
    • Contact me

    Copyright@securityaffairs 2024

    We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. By clicking “Accept All”, you consent to the use of ALL the cookies. However, you may visit "Cookie Settings" to provide a controlled consent.
    Cookie SettingsAccept All
    Manage consent

    Privacy Overview

    This website uses cookies to improve your experience while you navigate through the website. Out of these cookies, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities...
    Necessary
    Always Enabled
    Necessary cookies are absolutely essential for the website to function properly. This category only includes cookies that ensures basic functionalities and security features of the website. These cookies do not store any personal information.
    Non-necessary
    Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. It is mandatory to procure user consent prior to running these cookies on your website.
    SAVE & ACCEPT