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Docs: Some small tweaks to the Log4Shell documentation

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Mike Salvatore 2022-01-13 09:40:59 -05:00
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docs/content/reference/exploiters/Log4Shell.md
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@ -5,20 +5,33 @@ draft: false
tags: ["exploit", "linux", "windows"]
---
The Log4Shell exploiter exploits [CVE-2021-44228](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-44228).
The Log4Shell exploiter exploits
[CVE-2021-44228](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-44228).
### Description
Some versions of Apache Log4j, a Java logging framework, have a logging feature called “Message Lookup Substitution” enabled by default. This allows replacing certain special strings by dynamically-generated strings at the time of logging. If log messages or log message parameters can be controlled by an attacker, arbitrary code can be executed. The Log4Shell exploiter takes advantage of this vulnerability to propagate to a victim machine.
Some versions of Apache Log4j, a Java logging framework, have a logging feature
called "Message Lookup Substitution" enabled by default. This allows replacing
certain special strings by dynamically-generated strings at the time of
logging. If log messages or log message parameters can be controlled by an
attacker, arbitrary code can be executed. The Log4Shell exploiter takes
advantage of this vulnerability to propagate to a victim machine.
To learn about the appropriate mitigations and read more, click [here](https://logging.apache.org/log4j/2.x/security.html#Fixed_in_Log4j_2.15.0_.28Java_8.29).
You can learn more about this vulnerability and potential mitigations
[here](https://logging.apache.org/log4j/2.x/security.html#Fixed_in_Log4j_2.15.0_.28Java_8.29).
### Services exploited
The following services are attempted to be exploited:
The Infection Monkey will attempt to exploit the Log4Shell vulnerability in the
following services:
- Apache Solr
- Apache Tomcat
- Logstash
**Note**: Even if none of these services are running in your environment,
running the Log4Shell exploiter can be a good way to test your IDS/IPS or EDR
solutions. These solutions should detect that the Infection Monkey is attempting
to exploit the Log4Shell vulnerability and raise an appropriate alert.