Log4j Remediation (Case Study)

Log4j Remediation (Case Study)

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Problem Statement:

One of our clients was using the Log4j software library to manage their logging services and hence, they were one of the at-risk companies that required an immediate and resilient remediation solution.

If not addressed promptly and properly, this vulnerability could have created devastating impacts including:

  • Disruption in regular business operations
  • Major incident response and recovery costs
  • Damage brand’s reputation

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Solution Implementation:

Based on the analysis of the servers, whether they are Windows or Linux, we have implemented the following remediation steps to mitigate this Log4j vulnerability:

Step #1: Initially upgraded the log4j2 java class, which was the preferred remediation option but despite the upgrade, vulnerabilities continued. Hence, eventually, the java class was upgraded to the latest version.

Step #2: Removed the JNDI Lookup class from the class-path, but this option eventually did not prove to be efficient against the vulnerability.

Step #3: Removed the JNDI classes from the jar file.

Step #4: Applied a fix provided by technical team, wherever applicable, such as in the case of Adobe or other third-party applications.

Step #5: In the case of high-risk external client applications, uninstalled the software itself.

Step #6: Coordinated effectively with product owners and vendors to ensure that there is no impact.

Step #7: Constant monitoring (hourly monitoring) of the vulnerability using the required scanning tools.

Final Result:

Here is the learning outcome (result) of this case:

  • The in time response to the vulnerability has saved our client from any serious cyber-incidents (including remote code execution by unauthenticated users) 
  • Proper coordination and communication with the client, vendors and third-parties has made this implementation process easier.

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