Fortinet FortiOS up to 7.2.2 sslvpnd heap-based overflow

Summaryinfo

A vulnerability, which was classified as critical, has been found in Fortinet FortiOS. This impacts an unknown function of the component sslvpnd. Performing a manipulation results in heap-based overflow. This vulnerability was named CVE-2022-42475. The attack may be initiated remotely. In addition, an exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as very critical has been found in Fortinet FortiOS (Firewall Software). This affects an unknown functionality of the component sslvpnd. The manipulation with an unknown input leads to a heap-based overflow vulnerability. CWE is classifying the issue as CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). This is going to have an impact on confidentiality, integrity, and availability.

The weakness was presented 12/13/2022 as FG-IR-22-398. The advisory is shared at fortiguard.com. This vulnerability is uniquely identified as CVE-2022-42475. Technical details are unknown but an exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 04/07/2025).

It is declared as attacked. The CISA Known Exploited Vulnerabilities Catalog lists this issue since 12/13/2022 with a due date of 01/03/2023:

Apply updates per vendor instructions.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Zero-Day.cz (737). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Firewall Software

Vendor

• Fortinet

Name

• FortiOS

Version

• 6.2.0
• 6.2.1
• 6.2.2
• 6.2.3
• 6.2.4
• 6.2.5
• 6.2.6
• 6.2.7
• 6.2.8
• 6.2.9
• 6.2.10
• 6.2.11
• 6.4.0
• 6.4.1
• 6.4.2
• 6.4.3
• 6.4.4
• 6.4.5
• 6.4.6
• 6.4.7
• 6.4.8
• 6.4.9
• 6.4.10
• 7.0.0
• 7.0.1
• 7.0.2
• 7.0.3
• 7.0.4
• 7.0.5
• 7.0.6
• 7.0.7
• 7.0.8
• 7.2.0
• 7.2.1
• 7.2.2

License

• commercial

Website

• Vendor: https://www.fortinet.com/

CPE 2.3info

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CPE 2.2info

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Entryinfo

Submitinfo

Accepted

• Submit #56660: FortiOS - heap-based buffer overflow in sslvpnd (by cookedfrenchman)

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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