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They added, “An attacker can actually use this to inject his own traffic, and essentially communicate with any internal device in the business, including point of sales, sensitive data centers, etc. “Therefore, an attacker can easily present a certificate issued to a different FortiGate router without raising any flags, and implement a man-in-the-middle attack,” researchers wrote, in an analysis on Thursday. It does not store any personal data.Default configurations of Fortinet’s FortiGate VPN appliance could open organizations to man-in-the-middle (MitM) attacks, according to researchers, where threat actors could intercept important data.Īccording to the SAM IoT Security Lab, the FortiGate SSL-VPN client only verifies that the certificate used for client authentication was issued by Fortinet or another trusted certificate authority. The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. The cookie is used to store the user consent for the cookies in the category "Performance". This cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Other. The cookies is used to store the user consent for the cookies in the category "Necessary". The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". The cookie is used to store the user consent for the cookies in the category "Analytics". These cookies ensure basic functionalities and security features of the website, anonymously. Necessary cookies are absolutely essential for the website to function properly. Fortinet strongly recommends adhering to its provided installation documentation and process, paying close attention to warnings throughout that process to avoid exposing the organization to risk.”
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“Each VPN appliance and the setup process provides multiple clear warnings in the GUI with documentation offering guidance on certificate authentication and sample certificate authentication and configuration examples.
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Fortinet VPN appliances are designed to work out-of-the-box for customers so that organizations are enabled to set up their appliance customized to their own unique deployment.” UPDATE: In a statement provided to The Hacker News, the company said: “The security of our customers is our first priority. Smaller businesses require leaner, seamless, easy-to-use security products that may be less flexible, but provide much better basic security.” “These types of businesses require near enterprise-grade security these days, but do not have the resources and expertise to maintain enterprise security systems. “The Fortigate issue is only an example of the current issues with security for the small-medium businesses, especially during the epidemic work-from-home routine,” Hertz and Tashimov noted. It is recommended to purchase a certificate for your domain and upload it for use.” To achieve this, the researchers set up a compromised IoT device that’s used to trigger a MitM attack soon after the Fortinet VPN client initiates a connection, which then steals the credentials before passing it to the server and spoofs the authentication process.Ĭurrently, Fortinet provides a warning when using the default certificate: “You are using a default built-in certificate, which will not be able to verify your server’s domain name (your users will see a warning). “The Fortigate SSL-VPN client only verifies that the CA was issued by Fortigate (or another trusted CA), therefore an attacker can easily present a certificate issued to a different Fortigate router without raising any flags, and implement a man-in-the-middle attack.” “We quickly found that under default configuration the SSL VPN is not as protected as it should be, and is vulnerable to MITM attacks quite easily,” SAM IoT Security Lab’s Niv Hertz and Lior Tashimov said. Now according to network security platform provider SAM Seamless Network, over 200,000 businesses that have deployed the Fortigate VPN solution-with default configuration-to enable employees to connect remotely are vulnerable to man-in-the-middle (MitM) attacks, allowing attackers to present a valid SSL certificate and fraudulently take over a connection. As the pandemic continues to accelerate the shift towards working from home, a slew of digital threats have capitalized on the health concern to exploit weaknesses in the remote work infrastructure and carry out malicious attacks.