Check: UBTU-20-010406
Canonical Ubuntu 20.04 LTS STIG:
UBTU-20-010406
(in versions v1 r12 through v1 r1)
Title
The Ubuntu operating system must not have the rsh-server package installed. (Cat I impact)
Discussion
It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the risk to the platform by providing additional attack vectors. Operating systems are capable of providing a wide variety of functions and services. Some of the functions and services, provided by default, may not be necessary to support essential organizational operations (e.g., key missions, functions). Examples of non-essential capabilities include, but are not limited to, games, software packages, tools, and demonstration software, not related to requirements or providing a wide array of functionality not required for every mission, but which cannot be disabled.
Check Content
Verify the rsh-server package is installed with the following command: $ dpkg -l | grep rsh-server If the rsh-server package is installed, this is a finding.
Fix Text
Configure the Ubuntu operating system to disable non-essential capabilities by removing the rsh-server package from the system with the following command: $ sudo apt-get remove rsh-server
Additional Identifiers
Rule ID: SV-238327r654156_rule
Vulnerability ID: V-238327
Group Title: SRG-OS-000095-GPOS-00049
Expert Comments
CCIs
Number | Definition |
---|---|
CCI-000381 |
The organization configures the information system to provide only essential capabilities. |
Controls
Number | Title |
---|---|
CM-7 |
Least Functionality |