cyberstrikeus 2.3.2 Ensure rsh client is not installed (Scored)
Profile Applicability
- Level 1 - Server
- Level 1 - Workstation
Description
The rsh 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.
Audit Procedure
Run the following commands and verify rsh is not installed:
dpkg -s rsh-client
dpkg -s rsh-redone-client
Expected Result
Both commands should indicate that the packages are not installed.
Remediation
Run the following command to uninstall rsh:
apt-get remove rsh-client rsh-redone-client
Default Value
rsh client is not installed by default.
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.
References
- CIS Controls: 3.4 Use Only Secure Channels For Remote System Administration
Profile
- Level 1 - Server
- Level 1 - Workstation