| Dmitry Teselkin | 4326d34 | 2018-04-26 17:21:22 +0300 | [diff] [blame] | 1 | # 2.3.1 Ensure NIS Client is not installed |
| 2 | # |
| 3 | # Description |
| 4 | # =========== |
| 5 | # The Network Information Service (NIS), formerly known as Yellow Pages, |
| 6 | # is a client-server directory service protocol used to distribute system |
| 7 | # configuration files. The NIS client ( ypbind ) was used to bind a machine |
| 8 | # to an NIS server and receive the distributed configuration files. |
| 9 | # |
| 10 | # Rationale |
| 11 | # ========= |
| 12 | # The NIS service is inherently an insecure system that has been vulnerable |
| 13 | # to DOS attacks, buffer overflows and has poor authentication for querying |
| 14 | # NIS maps. NIS generally has been replaced by such protocols as Lightweight |
| 15 | # Directory Access Protocol (LDAP). It is recommended that the service be |
| 16 | # removed. |
| 17 | # |
| 18 | # Audit |
| 19 | # ===== |
| 20 | # Run the following command and verify nis is not installed: |
| 21 | # |
| 22 | # dpkg -s nis |
| 23 | # |
| 24 | # Remediation |
| 25 | # =========== |
| 26 | # Run the following command to uninstall nis: |
| 27 | # |
| 28 | # apt-get remove nis |
| 29 | # |
| 30 | # Impact |
| 31 | # ====== |
| 32 | # Many insecure service clients are used as troubleshooting tools and in |
| 33 | # testing environments. Uninstalling them can inhibit capability to test |
| 34 | # and troubleshoot. If they are required it is advisable to remove the clients |
| 35 | # after use to prevent accidental or intentional misuse. |
| 36 | # |
| 37 | parameters: |
| 38 | linux: |
| 39 | system: |
| 40 | package: |
| 41 | nis: |
| 42 | version: removed |
| 43 | |