CVE-2024-21762: Fortinet FortiOS Out-of-Bound Write Vulnerability

CVE-2024-21762 · Severity: critical · CVSS 9.8 · Exploited in the wild · Published 2024-02-09

An out-of-bounds write vulnerability in Fortinet FortiOS and FortiProxy allows a remote unauthenticated attacker to execute arbitrary code or commands via specially crafted HTTP requests. The vulnerability is known to be exploited in the wild.

Technologies: Fortinet FortiADC, Fortinet FortiOS, Fortinet FortiProxy, Fortinet FortiProxy SSL-VPN. Vendors: Fortinet.

Quick answers

Is CVE-2024-21762 exploited in the wild?
Yes. CVE-2024-21762 is known to be exploited in the wild, first recorded on 9 February 2024. Treat it as urgent.
How severe is CVE-2024-21762?
Critical severity, with a CVSS score of 9.8, published 9 February 2024.
Which products and versions are affected?
Fortinet FortiOS 7.4.0 through 7.4.2, 7.2.0 through 7.2.6, 7.0.0 through 7.0.13, 6.4.0 through 6.4.14, 6.2.0 through 6.2.15, 6.0.0 through 6.0.17; Fortinet FortiProxy 7.4.0 through 7.4.2, 7.2.0 through 7.2.8, 7.0.0 through 7.0.14, 2.0.0 through 2.0.13, 1.2.0 through 1.2.13, 1.1.0 through 1.1.6, 1.0.0 through 1.0.7.
Is there a fix for CVE-2024-21762?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2024-21762 attacked?
It is attacked over the network, in a network appliance.
Am I affected by CVE-2024-21762?
Check whether you run Fortinet FortiADC, Fortinet FortiOS, Fortinet FortiProxy or one of the others listed. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Affected products

  • Fortinet FortiOS 7.4.0 through 7.4.2, 7.2.0 through 7.2.6, 7.0.0 through 7.0.13, 6.4.0 through 6.4.14, 6.2.0 through 6.2.15, 6.0.0 through 6.0.17
  • Fortinet FortiProxy 7.4.0 through 7.4.2, 7.2.0 through 7.2.8, 7.0.0 through 7.0.14, 2.0.0 through 2.0.13, 1.2.0 through 1.2.13, 1.1.0 through 1.1.6, 1.0.0 through 1.0.7

Timeline

  • 2024-02-09: disclosed
  • 2024-02-09: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
  • 2024-02-09: exploited: Reported as exploited in the wild at time of publication

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