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THOUSANDS OF FORTINET DEVICES COULD FACE ATTACK FOLLOWING SECURITY ISSUE

News
By Sead Fadilpašić
published March 12, 2024

A patch for a high-severity flaw has been available for a month

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(Image credit: Future)


Hackers have a pool of almost 150,000 vulnerable Fortinet FortiOS and FortiProxy
instances which they can use to execute malicious code without authentication,
experts have warned.



A month ago, Fortinet released a patch for a critical vulnerability tracked as
CVE-2024-21762 (severity score 9.8), but it seems many admins aren’t diligently
installing the fixes. To make matters worse, this flaw was already added to
Cybersecurity and Infrastructure Security Agency’s (CISA) Known Exploited
Vulnerabilities (KEV), meaning hackers are actively taking advantage of it. 



However, the details about hackers abusing the flaw are scarce. That could
either mean that public platforms aren’t showing this activity, or the flaw is
being used by highly sophisticated threat actors.





PATCHING THE FLAWS

Now, BleepingComputer has spoken to Shadowserver’s Piotr Kijevski, who said that
the organization scans the internet for vulnerable versions, but since
workarounds and mitigations are also available, it could be that the number of
vulnerable endpoints is somewhat lower. The majority of the potential targets,
the organization further said, was in the United States (24,000), followed by
India, Brazil, and Canada.

LATEST VIDEOS FROM techradar Tech Radar Pro



As per the National Vulnerability Database, this critical vulnerability is an
out-of-bounds write flaw, plaguing multiple versions of FortiOS, and FortiProxy.
Theoretically, an attacker could execute unauthorized code on vulnerable
devices, using specifically crafted requests. 



Fortinet’s products are popular among small and medium-sized businesses (SMB),
which makes them a prime target for cybercriminals. As a result, the company
often releases security patches and urges customers to apply them without
hesitation. 

In early July 2023, it was said that “hundreds of thousands” of FortiGate
firewalls were vulnerable to CVE-2023-27997, a heap-based buffer overflow
vulnerability with a 9.8 severity score. 


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This flaw affected FortiOS and FortiProxy devices with SSL-VPN enabled. In March
the same year, unknown hackers targeted certain US government networks with a
zero-day vulnerability found in a Fortinet product. It was later reported that
the attackers abused CVE-2022-41328 - an improper limitation of a pathname to a
restricted directory vulnerability ('path traversal') [CWE-22] in FortiOS, which
could have allowed a privileged attacker “to read and write arbitrary files via
crafted CLI commands."


MORE FROM TECHRADAR PRO

 * Fortinet flaws are being exploited in attacks on government
 * Here's a list of the best firewalls around today
 * These are the best endpoint security tools right now

Sead Fadilpašić
Social Links Navigation

Sead is a seasoned freelance journalist based in Sarajevo, Bosnia and
Herzegovina. He writes about IT (cloud, IoT, 5G, VPN) and cybersecurity
(ransomware, data breaches, laws and regulations). In his career, spanning more
than a decade, he’s written for numerous media outlets, including Al Jazeera
Balkans. He’s also held several modules on content writing for Represent
Communications.

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