What is CVE-2021-24018?

CVE-2021-24018 is a buffer underwrite vulnerability in the firmware verification routine of FortiOS before 7.0.1.

What is the severity of CVE-2021-24018?

CVE-2021-24018 has a severity score of 8.8 (high).

Which versions of Fortinet FortiOS are affected by CVE-2021-24018?

Fortinet FortiOS versions up to 6.2.10, versions 6.4.0 to 6.4.7, and version 7.0.0 are affected by CVE-2021-24018.

How can I fix CVE-2021-24018?

To fix CVE-2021-24018, it is recommended to update Fortinet FortiOS to version 7.0.1 or later.

Vulnerability/
CVE-2021-24018

high

8.8

CWE

787

3/8/2021

4/8/2021

24/10/2024

25/10/2024

CVE-2021-24018: Buffer Underwrite in firmware verification

Q: How does CVE-2021-24018 impact Fortinet FortiOS?

CVE-2021-24018 may allow an attacker located in the adjacent network to potentially execute arbitrary code via a specifically crafted firmware image.

First published: Tue Aug 03 2021(Updated: )

A buffer underwrite (CWE-124) vulnerability in the firmware verification routine of FortiWeb, FortiOS, FortiSwitch, FortiADC, FortiAI, FortiManager, FortiAnalyzer, FortiProxy may allow an attacker located in the adjacent network to potentially execute arbitrary code via a specifically crafted firmware image.

Credit: psirt@fortinet.com psirt@fortinet.com

Affected Software	Affected Version	How to fix
Fortinet FortiOS	<6.2.10
Fortinet FortiOS	>=6.4.0<6.4.7
Fortinet FortiOS	=7.0.0

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Reference Links

Frequently Asked Questions

What is CVE-2021-24018?
CVE-2021-24018 is a buffer underwrite vulnerability in the firmware verification routine of FortiOS before 7.0.1.
What is the severity of CVE-2021-24018?
CVE-2021-24018 has a severity score of 8.8 (high).
How does CVE-2021-24018 impact Fortinet FortiOS?
CVE-2021-24018 may allow an attacker located in the adjacent network to potentially execute arbitrary code via a specifically crafted firmware image.
Which versions of Fortinet FortiOS are affected by CVE-2021-24018?
Fortinet FortiOS versions up to 6.2.10, versions 6.4.0 to 6.4.7, and version 7.0.0 are affected by CVE-2021-24018.
How can I fix CVE-2021-24018?
To fix CVE-2021-24018, it is recommended to update Fortinet FortiOS to version 7.0.1 or later.

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version/fortinet fortios/6.4.0
version/fortinet fortios/7.0.0

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