Apache Tomcat Manager Login Found

Description

By default, the Tomcat Manager application should only be accessible from a browser running on the same machine as Tomcat. However, if the Manager login page is accessible over the internet, attackers can exploit this to launch password guessing and brute force attacks, potentially gaining unauthorized access to the server.

Recommendation

Update the webapps/manager/META-INF/context.xml file to allow white listed IP addresses. Below example allows local machine IPs starting with 127.

<Context antiResourceLocking="false" privileged="true" >
  
  <Valve className="org.apache.catalina.valves.RemoteAddrValve"
         allow="127\.\d+\.\d+\.\d+|::1|0:0:0:0:0:0:0:1" />
  
  <Manager sessionAttributeValueClassNameFilter="java\.lang\.(?:Boolean|Integer|Long|Number|String)|org\.apache\.catalina\.filters\.CsrfPreventionFilter\$LruCache(?:\$1)?|java\.util\.(?:Linked)?HashMap"/>
</Context>

References

• OWASP: Brute Force Attack
• Apache Tomcat
• CAPEC-49

Related Issues

• Unreferenced Login Page Found - Vulnerability
• WordPress Login Page Found - Vulnerability
• Apache mod_jk Access Control Bypass - CVE-2018-11759
• Brute Force Prevention Bypassed - Vulnerability

Tags:

Tomcat

Brute Force

Access Control

Authentication