Fortinet FortiWAN up to 4.4.1/4.5.7 POST Request authentication bypass

Summaryinfo

A vulnerability described as very critical has been identified in Fortinet FortiWAN up to 4.4.1/4.5.7. Impacted is an unknown function of the component POST Request Handler. Such manipulation leads to authentication bypass. This vulnerability is documented as CVE-2021-26102. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in Fortinet FortiWAN up to 4.4.1/4.5.7 and classified as very critical. Affected by this issue is an unknown code block of the component POST Request Handler. The manipulation with an unknown input leads to a authentication bypass vulnerability. Using CWE to declare the problem leads to CWE-305. The authentication algorithm is sound, but the implemented mechanism can be bypassed as the result of a separate weakness that is primary to the authentication error. Impacted is confidentiality, integrity, and availability. CVE summarizes:

A relative path traversal vulnerability (CWE-23) in FortiWAN version 4.5.7 and below, 4.4 all versions may allow a remote non-authenticated attacker to delete files on the system by sending a crafted POST request. In particular, deleting specific configuration files will reset the Admin password to its default value.

The advisory is available at fortiguard.fortinet.com. This vulnerability is handled as CVE-2021-26102 since 01/25/2021. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 01/22/2025).

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

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

• Fortinet

Name

• FortiWAN

Version

• 4.4.0
• 4.4.1
• 4.5.0
• 4.5.1
• 4.5.2
• 4.5.3
• 4.5.4
• 4.5.5
• 4.5.6
• 4.5.7

License

• commercial

Website

• Vendor: https://www.fortinet.com/

CPE 2.3info

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CPE 2.2info

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Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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