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The /etc/hosts file must not have an extended ACL.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-22326 | GEN001369 | SV-44984r1_rule | Medium |
| Description |
|---|
| The /etc/hosts file (or equivalent) configures local host name to IP address mappings that typically take precedence over DNS resolution. If this file is maliciously modified, it could cause the failure or compromise of security functions requiring name resolution, which may include time synchronization, centralized authentication, and remote system logging. |
| STIG | Date |
|---|---|
| SUSE Linux Enterprise Server v11 for System z | 2016-12-20 |
Details
| Check Text ( C-42391r1_chk ) |
|---|
| Verify /etc/hosts has no extended ACL. # ls -l /etc/hosts If the permissions include a '+', the file has an extended ACL. If the file has an extended ACL and it has not been documented with the IAO, this is a finding. |
| Fix Text (F-38401r1_fix) |
|---|
| Remove the extended ACL from the file. # setfacl --remove-all /etc/hosts |