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https://issues.apache.org/jira/browse/NIFI-9505?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17464167#comment-17464167
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David Handermann commented on NIFI-9505:
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[~wesley.philip], yes, that is a good summary.
> Upgrade Log4j 2 to 2.17.0
> -------------------------
>
> Key: NIFI-9505
> URL: https://issues.apache.org/jira/browse/NIFI-9505
> Project: Apache NiFi
> Issue Type: Bug
> Reporter: David Handermann
> Assignee: David Handermann
> Priority: Minor
> Fix For: 1.16.0, 1.15.2
>
>
> Log4j 2 version 2.17.0 addresses a potential vulnerability in non-standard
> logging configurations using Thread Context Map lookup capabilities,
> described in [CVE-2021-45105|https://www.cve.org/CVERecord?id=CVE-2021-45105].
> Although NiFi does not use Log4j 2 for runtime logging, upgrading to version
> 2.17.0 avoids potential references to older versions in external components.
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