# Zero-day-exploit in log4j2 which is part of elasticsearch

**URL:** <https://discuss.elastic.co/t/zero-day-exploit-in-log4j2-which-is-part-of-elasticsearch/291439>\
**Category:** Elasticsearch\
**Created:** [December 10, 2021, 3:46pm UTC](https://discuss.elastic.co/t/zero-day-exploit-in-log4j2-which-is-part-of-elasticsearch/291439 "2021-12-10T15:46:15Z")\
**Posts on this page:** 1\
**Showing post:** 63

<div class="post-metadata">

**Author:** ![sandeepkanabar](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/sandeepkanabar/32/79399_2.png) [@sandeepkanabar](https://discuss.elastic.co/u/sandeepkanabar)\
**Post date:** [December 14, 2021, 7:45pm UTC](https://discuss.elastic.co/t/zero-day-exploit-in-log4j2-which-is-part-of-elasticsearch/291439/63 "2021-12-14T19:45:36Z")

</div>

If you are using `bash` and the ` **/*` does _** NOT**_ work, then run `shopt -s globstar` before running the `zip` command.

```auto
shopt -s globstar
ls -lrt /usr/share/logstash/logstash-core/**/*/log4j-core-2.*

```

```auto
zip -d <output_of_above_command> org/apache/logging/log4j/core/lookup/JndiLookup.class
chown logstash:logstash <output_of_above_command>

```

Restart Logstash.

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_[View the full topic](https://discuss.elastic.co/t/zero-day-exploit-in-log4j2-which-is-part-of-elasticsearch/291439)._