# MA-823.122021: MyCERT Alert - Critical Vulnerability in Apache Java Logging Library Log4j

**Date:** 12 Dec 2021  
**Source:** https://www.mycert.org.my/portal/advisory?id=MA-823.122021  
**Advisory ID:** MA-823.122021

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**1.0 Introduction**
The Apache Software Foundation has released a security advisory to address a remote code execution vulnerability (CVE-2021-44228) affecting Log4j versions 2.0-beta9 to 2.14.1. A remote attacker could exploit this vulnerability to take control of an affected system. Log4j is an open-source, Java-based logging utility widely used by enterprise applications and cloud services.
**2.0 Impact**
Exploiting this vulnerabilities may allow an attacker to take control of an affected system.
**3.0 Affected System and Devices**
This vulnerability affecting Log4j versions 2.0-beta9 to 2.14.1.
**4.0 Recommendations**
To mitigate CVE-2021-44228, MyCERT strongly urges users and administrators to review the [Apache Log4j 2.15.0 Announcement](https://logging.apache.org/log4j/2.x/security.html) and upgrade to Log4j 2.15.0 or apply the recommended mitigations immediately. Kindly refer to the below URL:
<https://logging.apache.org/log4j/2.x/security.html>
<https://logging.apache.org/log4j/2.x/download.html>
Generally, MyCERT advises the users of this devices to be updated with the latest security announcements by the vendor and follow best practice security policies to determine which updates should be applied.
For further enquiries, please contact MyCERT through the following channels:
E-mail: cyber999[at]cybersecurity.my
Phone: 1-300-88-2999 (monitored during business hours) 
Mobile: +60 19 2665850 (24x7 call incident reporting)
Business Hours: Mon - Fri 09:00 -18:00 MYT
Web: <https://www.mycert.org.my>
Twitter: <https://twitter.com/mycert>
Facebook: <https://www.facebook.com/mycert.org.my>
**5.0    References**
- <https://www.cisa.gov/uscert/ncas/current-activity/2021/12/10/apache-releases-log4j-version-2150-address-critical-rce>
- <https://auscert.org.au/bulletins/ASB-2021.0244>
- <https://www.lunasec.io/docs/blog/log4j-zero-day/>
- [https://www.randori.com/blog/cve-2021-44228/](https://www.randori.com/blog/cve-2021-44228/  )
- <https://logging.apache.org/log4j/2.x/security.html>
- <https://logging.apache.org/log4j/2.x/download.html>