| Dmitry Teselkin | 4326d34 | 2018-04-26 17:21:22 +0300 | [diff] [blame] | 1 | # 2.3.4 Ensure telnet client is not installed |
| 2 | # |
| 3 | # Description |
| 4 | # =========== |
| 5 | # The telnet package contains the telnet client, which allows users to start |
| 6 | # connections to other systems via the telnet protocol. |
| 7 | # |
| 8 | # Rationale |
| 9 | # ========= |
| 10 | # The telnet protocol is insecure and unencrypted. The use of an unencrypted |
| 11 | # transmission medium could allow an unauthorized user to steal credentials. |
| 12 | # The ssh package provides an encrypted session and stronger security and is |
| 13 | # included in most Linux distributions. |
| 14 | # |
| 15 | # Audit |
| 16 | # ===== |
| 17 | # Run the following command and verify telnet is not installed: |
| 18 | # |
| 19 | # # dpkg -s telnet |
| 20 | # |
| 21 | # Remediation |
| 22 | # =========== |
| 23 | # Run the following command to uninstall telnet : |
| 24 | # |
| 25 | # # apt-get remove telnet |
| 26 | # |
| 27 | # Impact |
| 28 | # ====== |
| 29 | # Many insecure service clients are used as troubleshooting tools and in |
| 30 | # testing environments. Uninstalling them can inhibit capability to test and |
| 31 | # troubleshoot. If they are required it is advisable to remove the clients |
| 32 | # after use to prevent accidental or intentional misuse. |
| 33 | # |
| 34 | parameters: |
| 35 | linux: |
| 36 | system: |
| 37 | package: |
| 38 | telnet: |
| 39 | version: removed |
| 40 | |