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https://issues.apache.org/jira/browse/LOG4J2-3214?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17458265#comment-17458265
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Remko Popma commented on LOG4J2-3214:
-------------------------------------
Thank you [~vy]!
I actually slightly preferred the {{{}%m{nolookups{}}}} solution to the system
property/environment variable solution.
The reason being that my experience doing this mitigation process in a few
applications at work, this was the simplest to implement and easiest to verify.
The system property/environment variable does not have "evidence" that is
working, while the configuration is more self-evident. (We had some wrapper
scripts and processes were started via cron that made the system
property/environment variable solution more complex and harder to verify in our
environment.)
> update security page text for CVE-2021-44228
> --------------------------------------------
>
> Key: LOG4J2-3214
> URL: https://issues.apache.org/jira/browse/LOG4J2-3214
> Project: Log4j 2
> Issue Type: Documentation
> Affects Versions: 2.15.0
> Reporter: Remko Popma
> Priority: Major
> Fix For: 2.16.0
>
>
> I propose to update the text for the mitigation section of CVE-2021-44228 on
> [https://logging.apache.org/log4j/2.x/security.html]
> Changes: add Log4j 1.x section, and format the Log4j 2.x section as a bullet
> point list for improved readability.
> ----
> {*}Log4j 1.x mitigation{*}: Audit your logging configuration to ensure it has
> no {{JMSAppender}} configured. Log4j 1.x configurations without JMSAppender
> are not impacted by this vulnerability.
> {*}Log4j 2.x mitigation{*}: Implement one of the below listed mitigation
> techniques, ordered from the most recommended approach to the least.
> # Upgrade to a version >=2.15.0 or later
> # For releases >=2.10,
> ** set system property {{log4j2.formatMsgNoLookups}} to {{true}} (see
> [details|https://logging.apache.org/log4j/2.x/manual/configuration.html#SystemProperties])
> ** or set environment variable {{LOG4J_FORMAT_MSG_NO_LOOKUPS}} to {{true}}
> (see
> [details|https://logging.apache.org/log4j/2.x/manual/configuration.html#SystemProperties]).
> # For releases >=2.7 and <=2.14.1, modify your logging configuration to
> disable message lookups:
> ** use {{{}%m{nolookups{}}}} instead of just {{%m}}
> ** use {{{}%msg{nolookups{}}}} instead of just {{%msg}}
> ** use {{{}%message{nolookups{}}}} instead of just {{%message}}
> # For releases >=2.0-beta9 and <2.7, remove the {{JndiLookup}} class from
> the classpath: {{zip \-q \-d log4j-core-*.jar
> org/apache/logging/log4j/core/lookup/JndiLookup.class}}
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