Critical · published July 25, 2020
CVSS calls it critical at 9.8. It is confirmed in active exploitation. It sits in the 98.8th percentile for exploit probability.
🚨 A sneaky case-sensitivity flaw in FortiOS lets attackers bypass 2FA, making it alarmingly easy for them to log in with just a username tweak! 🔥 Think of it like a hotel front desk that doesn't notice your name is written differently on the reservation — it lets anyone in who can cleverly tweak their ID just enough. This vulnerability means that a simple case change in the username could bypass the extra security of FortiToken! An attacker could exploit this vulnerability to log in successfully without ever needing the second factor of authentication. This means they could gain full access to the SSL VPN, potentially exposing sensitive data and systems to unauthorized users. The consequences could be absolutely devastating, with far-reaching implications for both security and privacy!
Think of it like a hotel front desk that doesn't notice your name is written differently on the reservation — it lets anyone in who can cleverly tweak their ID just enough. This vulnerability means that a simple case change in the username could bypass the extra security of FortiToken! This improper authentication vulnerability allows successful login without FortiToken verification for users if they modify the case of their username. It affects FortiOS versions 6.4.0, 6.2.0 to 6.2.3, and 6.0.9 and below, making it a critical concern.
An attacker could exploit this vulnerability to log in successfully without ever needing the second factor of authentication. This means they could gain full access to the SSL VPN, potentially exposing sensitive data and systems to unauthorized users. The consequences could be absolutely devastating, with far-reaching implications for both security and privacy! To protect your systems, immediately update FortiOS to a version that addresses this flaw. Ensure to apply security patches for any affected versions and consider implementing additional monitoring for unusual login attempts. It's crucial to educate users about the importance of maintaining their credentials correctly! This is fixable! Follow these steps, and you'll be back in the security saddle in no time! 🛡️
| Product | Versions | Fixed in |
|---|---|---|
| fortinet/fortios | < 6.0.10 | 6.0.10 |
| fortinet/fortios | ≥ 6.2.0, < 6.2.4 | 6.2.4 |
| fortinet/fortios | all versions | — |