Apache NiFi up to 1.9.2 Authentication Mechanism Logout session expiration

Summaryinfo

A vulnerability has been found in Apache NiFi up to 1.9.2 and classified as critical. This affects an unknown function of the component Authentication Mechanism. The manipulation leads to session expiration (Logout). This vulnerability is uniquely identified as CVE-2019-12421. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability was found in Apache NiFi up to 1.9.2 and classified as critical. This issue affects an unknown part of the component Authentication Mechanism. The manipulation with an unknown input leads to a session expiration vulnerability (Logout). Using CWE to declare the problem leads to CWE-613. According to WASC, "Insufficient Session Expiration is when a web site permits an attacker to reuse old session credentials or session IDs for authorization." Impacted is confidentiality, integrity, and availability. The summary by CVE is:

When using an authentication mechanism other than PKI, when the user clicks Log Out in NiFi versions 1.0.0 to 1.9.2, NiFi invalidates the authentication token on the client side but not on the server side. This permits the user's client-side token to be used for up to 12 hours after logging out to make API requests to NiFi.

The weakness was disclosed 11/19/2019 (Website). It is possible to read the advisory at nifi.apache.org. The identification of this vulnerability is CVE-2019-12421 since 05/28/2019. The exploitation is known to be difficult. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 11/20/2019).

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

The entries VDB-145965 and VDB-145964 are pretty similar. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

• Apache

Name

• NiFi

Version

• 1.9.0
• 1.9.1
• 1.9.2

License

• open-source

Website

• Vendor: https://www.apache.org/

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