cyberstrikeus 2.2.2 Ensure rsh client is not installed (Automated)
Description
The rsh-client package contains the client commands for the rsh services.
Rationale
These legacy clients contain numerous security exposures and have been replaced with the more secure SSH package. Even if the server is removed, it is best to ensure the clients are also removed to prevent users from inadvertently attempting to use these commands and therefore exposing their credentials. Note that removing the rsh package removes the clients for rsh, rcp and rlogin.
Impact
Many insecure service clients are used as troubleshooting tools and in testing environments. Uninstalling them can inhibit capability to test and troubleshoot. If they are required it is advisable to remove the clients after use to prevent accidental or intentional misuse.
Audit Procedure
Command Line
Verify rsh-client is not installed. Use the following command to provide the needed information:
dpkg -s rsh-client | grep -E '(Status:|not installed)'
Expected Result
dpkg-query: package 'rsh-client' is not installed and no information is available
Remediation
Command Line
Uninstall rsh:
apt purge rsh-client
Default Value
rsh-client is not installed on minimal server installations.
References
- CIS Controls v7 - 4.5 Use Multifactor Authentication For All Administrative Access
Profile
- Level 1 - Server
- Level 1 - Workstation