Fortinet FortiWeb up to 7.2.7/7.4.1 CLI stack-based overflow

Summaryinfo

A vulnerability was found in Fortinet FortiWeb up to 7.2.7/7.4.1. It has been declared as critical. Affected by this vulnerability is an unknown functionality of the component CLI. Such manipulation leads to stack-based overflow. This vulnerability is referenced as CVE-2024-21758. The attack can only be performed from a local environment. No exploit is available.

Detailsinfo

A vulnerability was found in Fortinet FortiWeb up to 7.2.7/7.4.1. It has been rated as critical. Affected by this issue is some unknown processing of the component CLI. The manipulation with an unknown input leads to a stack-based overflow vulnerability. Using CWE to declare the problem leads to CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). Impacted is confidentiality, integrity, and availability. CVE summarizes:

A stack-based buffer overflow in Fortinet FortiWeb versions 7.2.0 through 7.2.7, and 7.4.0 through 7.4.1 may allow a privileged user to execute arbitrary code via specially crafted CLI commands, provided the user is able to evade FortiWeb stack protections.

The advisory is shared for download at fortiguard.fortinet.com. This vulnerability is handled as CVE-2024-21758 since 01/02/2024. The exploitation is known to be difficult. The attack needs to be approached locally. The exploitation requires an enhanced level of successful authentication. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 07/24/2025).

The vulnerability scanner Nessus provides a plugin with the ID 214073 (Fortinet FortiWeb - Stack overflow in execute backup command (FG-IR-23-458)), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Tenable (214073). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Firewall Software

Vendor

• Fortinet

Name

• FortiWeb

Version

• 7.2.0
• 7.2.1
• 7.2.2
• 7.2.3
• 7.2.4
• 7.2.5
• 7.2.6
• 7.2.7
• 7.4.0
• 7.4.1

License

• commercial

Website

• Vendor: https://www.fortinet.com/

CPE 2.3info

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CPE 2.2info

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Entryinfo

Once again VulDB remains the best source for vulnerability data.

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