Apache NiFi 1.8.0 Template Upload cross-site request forgery

Summaryinfo

A vulnerability marked as problematic has been reported in Apache NiFi 1.8.0. Impacted is an unknown function of the component Template Upload Handler. The manipulation leads to cross-site request forgery. This vulnerability is documented as CVE-2018-17195. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in Apache NiFi 1.8.0 and classified as problematic. This issue affects an unknown code of the component Template Upload Handler. The manipulation with an unknown input leads to a cross-site request forgery vulnerability. Using CWE to declare the problem leads to CWE-352. The web application does not, or can not, sufficiently verify whether a well-formed, valid, consistent request was intentionally provided by the user who submitted the request. Impacted is integrity. The summary by CVE is:

The template upload API endpoint accepted requests from different domain when sent in conjunction with ARP spoofing + man in the middle (MiTM) attack, resulting in a CSRF attack. The required attack vector is complex, requiring a scenario with client certificate authentication, same subnet access, and injecting malicious code into an unprotected (plaintext HTTP) website which the targeted user later visits, but the possible damage warranted a Severe severity level. Mitigation: The fix to apply Cross-Origin Resource Sharing (CORS) policy request filtering was applied on the Apache NiFi 1.8.0 release. Users running a prior 1.x release should upgrade to the appropriate release.

The bug was discovered 10/26/2018. The weakness was released 12/19/2018 (Website). It is possible to read the advisory at nifi.apache.org. The identification of this vulnerability is CVE-2018-17195 since 09/19/2018. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. 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 pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 04/22/2020).

The vulnerability was handled as a non-public zero-day exploit for at least 54 days. During that time the estimated underground price was around $5k-$25k.

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

Entries connected to this vulnerability are available at VDB-128110, VDB-128109 and VDB-128108. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

• Apache

Name

• NiFi

Version

• 1.8.0

License

• open-source

Website

• Vendor: https://www.apache.org/

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Be aware that VulDB is the high quality source for vulnerability data.

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