Fortinet urges customers to immediately fix a critical authentication bypass flaw in FortiGate and FortiProxy

Fortinet addressed a critical authentication bypass vulnerability that impacted FortiGate firewalls and FortiProxy web proxies.

Fortinet addressed a critical authentication bypass flaw, tracked as CVE-2022-40684, that impacted FortiGate firewalls and FortiProxy web proxies.

An attacker can exploit the vulnerability to log into vulnerable devices.

“An authentication bypass using an alternate path or channel [CWE-88] in FortiOS and FortiProxy may allow an unauthenticated attacker to perform operations on the administrative interface via specially crafted HTTP or HTTPS requests,” reads the customer support bulletin issued by the company.

The company urges customers of addressing this critical vulnerability immediately due to the risk of remote exploitation of the flaw.

The vulnerability impacts FortiOS versions from 7.0.0 to 7.0.6 and from 7.2.0 to 7.2.1, and FortiProxy versions from 7.0.0 to 7.0.6 and 7.2.0

The cybersecurity firm addressed the flaw with the release of FortiOS/FortiProxy versions 7.0.7 or 7.2.2.

The company also provides a workaround for those who can’t immediately deploy security updates.

Customers that are not able to upgrade their systems should restrict access to their devices to a specific set of IP addresses.

At this time it is not clear if the vulnerability has been actively exploited in attacks in the wild.

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Pierluigi Paganini

(SecurityAffairs – hacking, authentication bypass)

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Pierluigi Paganini: 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”.

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