# MA-1323.052025: MyCERT Advisory - Security Updates - Apache Tomcat

**Date:** 08 May 2025  
**Source:** https://www.mycert.org.my/portal/advisory?id=MA-1323.052025  
**Advisory ID:** MA-1323.052025

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**1.0 Introduction**
Recently, Apache has released security updates to address two significant vulnerabilities affecting Apache Tomcat servers.
**2.0 Impact**
- Memory leak leads to OutOfMemoryException, potentially causing server crashes and downtime.
- Potential bypass of rewrite security rules, risking unauthorized access.
**3.0 Affected Products**
- Tomcat 11.0.0-M2 to 11.0.5
- Tomcat 10.1.10 to 10.1.39
- Tomcat 9.0.76 to 9.0.102
- Tomcat 11.0.0-M1 to 11.0.5
- Tomcat 10.1.0-M1 to 10.1.39
- Tomcat 9.0.0.M1 to 9.0.102
**4.0 Recommendations**
CyberSecurity Malaysia urges users and organisations to review the [Apache Security Bulletin](https://httpd.apache.org/download.cgi), follow the Mitigation steps and apply the necessary updates. 
Kindly refer to the URL for more information:
- <https://lists.apache.org/thread/y14yjrf40w2236hwjv7gmhs65csn42gj>
- <https://lists.apache.org/thread/sxzchc0mkp7kd238dzothwqh2cww6l7b>
Generally, Cyber999 advises the users of these 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 Cyber999 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 08:30 -17.30 MYT 
Web: [https://www.mycert.org.my](https://www.mycert.org.my/)
**5.0    References**
- <https://lists.apache.org/thread/sxzchc0mkp7kd238dzothwqh2cww6l7b>
- <https://lists.apache.org/thread/y14yjrf40w2236hwjv7gmhs65csn42gj>