cis-tomcat8-v110-4-5

name	cis-tomcat8-v110-4.5
description	Restrict access to Tomcat temp directory (Scored)
category	cis-tomcat
version	1.0.0
author	cyberstrike-official
tags	["cis","tomcat","linux","java","file-permissions","temp-directory"]
cis_id	4.5
cis_benchmark	CIS Apache Tomcat 8 Benchmark v1.1.0
tech_stack	["linux","tomcat","java"]
cwe_ids	[]
chains_with	[]
prerequisites	[]
severity_boost	{}

Restrict access to Tomcat temp directory (Scored)

Description

The Tomcat $CATALINA_HOME/temp directory is used by Tomcat to persist temporary information to disk. It is recommended that the ownership of this directory be tomcat_admin:tomcat. It is also recommended that the permissions on this directory deny read, write, and execute for the world (o-rwx).

Rationale

Restricting access to these directories will prevent local users from maliciously or inadvertently affecting the integrity of Tomcat processes.

Audit Procedure

Perform the following to determine if the ownership and permissions on $CATALINA_HOME/temp are securely configured.

# cd $CATALINA_HOME
# find temp -follow -maxdepth 0 \( -perm /o+rwx -o ! -user tomcat_admin -o ! -group tomcat \) -ls

The above command should not produce any output.

Remediation

Perform the following to restrict access to Tomcat temp directory:

1. Set the ownership of the $CATALINA_HOME/temp to tomcat_admin:tomcat.

# chown tomcat_admin:tomcat $CATALINA_HOME/temp

2. Remove read, write, and execute permissions for the world.

# chmod o-rwx $CATALINA_HOME/temp

Default Value

The default permissions of the top-level directories are 770.

References

1. https://tomcat.apache.org/tomcat-8.0-doc/security-howto.html
2. https://tomcat.apache.org/tomcat-8.5-doc/security-howto.html

CIS Controls

v7:

• 14.6 Protect Information through Access Control Lists
  • Protect all information stored on systems with file system, network share, claims, application, or database specific access control lists. These controls will enforce the principle that only authorized individuals should have access to the information based on their need to access the information as a part of their responsibilities.

Profile Applicability

• Level 1