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Re: Log4j mitigation


From: Nick Hilliard <nick () foobar org>
Date: Tue, 14 Dec 2021 22:43:22 +0000

The log4j people have updated their security advisory to say that these two mitigation measures are not sufficient to protect against the recent vulnerability:

2. start java with "-D log4j2.formatMsgNoLookups=true" (v2.10+ only)
3. start java with "LOG4J_FORMAT_MSG_NO_LOOKUPS=true" environment variable (v2.10+ only)

The current recommended fixes are:

1. upgrade to 2.16.0 (not 2.15.0), or
2. remove the JndiLookup.class file from log4j-core-*.jar

More details on: https://logging.apache.org/log4j/2.x/security.html

Nick


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