| name | CIS Ubuntu 14.04 LTS - 2.3.3 Ensure talk client is not installed |
| description | Verify that the talk client package is not installed |
| category | cis-os-hardening |
| version | 2.1.0 |
| author | cyberstrike-official |
| tags | ["cis","ubuntu","ubuntu-14.04","level-1","scored","service-clients"] |
| cis_id | 2.3.3 |
| cis_benchmark | CIS Ubuntu Linux 14.04 LTS Benchmark v2.1.0 |
| tech_stack | ["ubuntu","linux"] |
| cwe_ids | [] |
| chains_with | [] |
| prerequisites | [] |
| severity_boost | low |
2.3.3 Ensure talk client is not installed (Scored)
Profile Applicability
- Level 1 - Server
- Level 1 - Workstation
Description
The talk software makes it possible for users to send and receive messages across systems through a terminal session. The talk client, which allows initialization of talk sessions, is installed by default.
Rationale
The software presents a security risk as it uses unencrypted protocols for communication.
Audit Procedure
Run the following command and verify talk is not installed:
dpkg -s talk
Expected Result
The command should indicate that the package is not installed (e.g., dpkg-query: package 'talk' is not installed).
Remediation
Run the following command to uninstall talk:
apt-get remove talk
Default Value
talk may be 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: 2 Inventory of Authorized and Unauthorized Software
Profile
- Level 1 - Server
- Level 1 - Workstation
