What We Do
How we do it
Resources
TRU INTELLIGENCE CENTER
Our Threat Response Unit (TRU) publishes security advisories, blogs, reports, industry publications and webinars based on its original research and the insights driven through proactive threat hunts.
View Threat Intelligence Resources →
SECURITY ADVISORIES
Mar 15, 2023
CVE-2023-23397 - Microsoft Outlook Elevation of Privilege Zero-Day Vulnerability
THE THREAT On March 14th, as part of Microsoft’s monthly Patch Tuesday release, the company disclosed a critical, actively exploited vulnerability impacting Microsoft Office and Outlook. The…
Read More
View all Advisories →
Company
ABOUT ESENTIRE
About Us
eSentire is The Authority in Managed Detection and Response Services, protecting the critical data and applications of 2000+ organizations in 80+ countries from known and unknown cyber threats. Founded in 2001, the company’s mission is to hunt, investigate and stop cyber threats before they become business disrupting events.
Read about how we got here
Leadership Work at eSentire
LATEST PRESS RELEASE
Mar 20, 2023
Exertis and eSentire Partner to Deliver 24/7 Multi-Signal MDR, Digital Forensics & IR Services and Exposure Management to Organisations Across the UK, Ireland, and Europe
Basingstoke, UK– 20 March, 2023. Leading technology distributor, Exertis, announced today that it has bolstered its cybersecurity services, adding eSentire, the Authority in Managed Detection and Response (MDR), to its Enterprise portfolio of offerings. eSentire’s award-winning, 24/7 multi-signal MDR, Digital Forensics & Incident Response (IR), and Exposure Management services will be available…
Read More
Partners
PARTNER PROGRAM
e3 Ecosystem
We provide sophisticated cybersecurity solutions for Managed Security Service Providers (MSSPs), Managed Service Providers (MSPs), and Value-Added Resellers (VARs). Find out why you should partner with eSentire, the Authority in Managed Detection and Response, today.
Learn more
ECOSYSTEM PARTNER RESOURCES
Apply to become an e3 ecosystem partner with eSentire, the Authority in Managed Detection and Response.
Login to the Partner Portal for resources and content for current partners.
Search
Resources
Security advisories — Oct 13, 2022

Actively Exploited Fortinet Authentication Bypass Vulnerability - CVE-2022-40684

2 minutes read
Speak With A Security Expert Now

THE THREAT

On October 10th, Fortinet publicly disclosed a critical vulnerability impacting multiple Fortinet products; the vulnerability was confirmed to be under active exploitation at the time of disclosure. The vulnerability is tracked as CVE-2022-40684 (CVSS: 9.6); it is an authentication bypass on administrative interface vulnerability that impacts FortiOS, FortiProxy, and FortiSwitchManager. Successfully exploiting CVE-2022-40684 would allow a remote and unauthenticated threat actor to log into vulnerable on-premises management instances via specially crafted HTTP or HTTPS requests.

On October 13th, a technical report on the vulnerability and functional Proof-of-Concept (POC) exploit code were released. The eSentire Threat Intelligence team assesses with high confidence that the publication of this information will increase real-world attacks in the immediate future. As exploitation is ongoing and expected to increase, impacted organizations are strongly urged to apply the relevant security patches or mitigations immediately.

What we’re doing about it

What you should do about it

Additional information

Details on real-world attacks exploiting CVE-2022-40684 have not been made public yet. However, as noted above, there are a number of publicly available proof of concepts to exploit the vulnerability available on code repositories. The eSentire Threat Intelligence team is actively tracking this topic for additional details and detection opportunities.

The technical blog outlines how using the Forwarded header, an attacker can set the client_ip to “127.0.0.1.” The “trusted access” authentication check verifies that the client_ip is “127.0.0.1” and the User-Agent is “Report Runner” both of which are under attacker control.

Impacted Products:

References:

[1] https://www.fortiguard.com/psirt/FG-IR-22-377
[2] https://github.com/horizon3ai/CVE-2022-40684
[3] https://www.horizon3.ai/fortios-fortiproxy-and-fortiswitchmanager-authentication-bypass-technical-deep-dive-cve-2022-40684/

View Most Recent Blogs