Fortinet FortiWeb up to 6.3.20/6.4.2/7.0.2 HTTP Response response splitting

Summaryinfo

A vulnerability classified as problematic has been found in Fortinet FortiWeb up to 6.3.20/6.4.2/7.0.2. This affects an unknown part of the component HTTP Response Handler. The manipulation leads to response splitting. This vulnerability is uniquely identified as CVE-2022-42471. The attack is possible to be carried out remotely. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Fortinet FortiWeb up to 6.3.20/6.4.2/7.0.2. This issue affects some unknown processing of the component HTTP Response Handler. The manipulation with an unknown input leads to a response splitting vulnerability. Using CWE to declare the problem leads to CWE-113. The product receives data from an HTTP agent/component (e.g., web server, proxy, browser, etc.), but it does not neutralize or incorrectly neutralizes CR and LF characters before the data is included in outgoing HTTP headers. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

An improper neutralization of CRLF sequences in HTTP headers ('HTTP Response Splitting') vulnerability [CWE-113] In FortiWeb version 7.0.0 through 7.0.2, FortiWeb version 6.4.0 through 6.4.2, FortiWeb version 6.3.6 through 6.3.20 may allow an authenticated and remote attacker to inject arbitrary headers.

The weakness was disclosed 01/03/2023 as FG-IR-22-250. It is possible to read the advisory at fortiguard.com. The identification of this vulnerability is CVE-2022-42471 since 10/07/2022. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 209717 (Fortinet FortiWeb (FG-IR-22-250)), which helps to determine the existence of the flaw in a target environment.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (209717). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• Firewall Software

Vendor

• Fortinet

Name

• FortiWeb

Version

• 6.3.0
• 6.3.1
• 6.3.2
• 6.3.3
• 6.3.4
• 6.3.5
• 6.3.6
• 6.3.7
• 6.3.8
• 6.3.9
• 6.3.10
• 6.3.11
• 6.3.12
• 6.3.13
• 6.3.14
• 6.3.15
• 6.3.16
• 6.3.17
• 6.3.18
• 6.3.19
• 6.3.20
• 6.4.0
• 6.4.1
• 6.4.2
• 7.0.0
• 7.0.1
• 7.0.2

License

• commercial

Website

• Vendor: https://www.fortinet.com/

CPE 2.3info

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CPE 2.2info

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Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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