Apache NiFi 1.5.0 Header X-ProxyContextPath/X-Forwarded-Context input validation

Summaryinfo

A vulnerability has been found in Apache NiFi 1.5.0 and classified as critical. The impacted element is an unknown function of the component Header Handler. This manipulation of the argument X-ProxyContextPath/X-Forwarded-Context causes input validation. The identification of this vulnerability is CVE-2017-15697. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability classified as critical was found in Apache NiFi 1.5.0. Affected by this vulnerability is an unknown part of the component Header Handler. The manipulation of the argument X-ProxyContextPath/X-Forwarded-Context with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

A malicious X-ProxyContextPath or X-Forwarded-Context header containing external resources or embedded code could cause remote code execution. The fix to properly handle these headers was applied on the Apache NiFi 1.5.0 release. Users running a prior 1.x release should upgrade to the appropriate release.

The bug was discovered 01/12/2018. The weakness was shared 01/23/2018 (Website). It is possible to read the advisory at nifi.apache.org. This vulnerability is known as CVE-2017-15697 since 10/21/2017. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 12/27/2019).

The vulnerability was handled as a non-public zero-day exploit for at least 11 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.

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Productinfo

Vendor

• Apache

Name

• NiFi

Version

• 1.5.0

License

• open-source

Website

• Vendor: https://www.apache.org/

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