# Cis Ubuntu1204 V110 13 10

> Check for Presence of User .rhosts Files

- Skill: `cyberstrikeus/cis-ubuntu1204-v110-13-10` (Agent Skill)
- Install (CLI): `npx skillmds@latest add cyberstrikeus/cis-ubuntu1204-v110-13-10`
- Raw SKILL.md: https://api.skillmd.com/api/skills/cyberstrikeus/cis-ubuntu1204-v110-13-10/raw
- Safety review: PASS (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: cyberstrikeus (https://skillmd.com/u/cyberstrikeus)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/cyberstrikeus/cis-ubuntu1204-v110-13-10

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# 13.10 Check for Presence of User .rhosts Files (Scored)

## Profile Applicability

- Level 1

## Description

While no `.rhosts` files are shipped by default, users can easily create them.

## Rationale

This action is only meaningful if `.rhosts` support is permitted in the file `/etc/pam.conf`. Even though the `.rhosts` files are ineffective if support is disabled in `/etc/pam.conf`, they may have been brought over from other systems and could contain information useful to an attacker for those other systems.

## Audit Procedure

### Using Command Line

```bash
#!/bin/bash
for dir in `/bin/cat /etc/passwd | /bin/egrep -v '(root|halt|sync|shutdown)' |\
    /usr/bin/awk -F: '($7 != "/usr/sbin/nologin") { print $6 }'`; do
for file in $dir/.rhosts; do
        if [ ! -h "$file" -a -f "$file" ]; then
echo ".rhosts file in $dir"         fi      done
done
```

## Expected Result

No output should be returned. Any output indicates the presence of `.rhosts` files in user home directories.

## Remediation

### Using Command Line

If any users have `.rhosts` files determine why they have them.

## Default Value

No `.rhosts` files exist by default on Ubuntu 12.04.

## References

- CIS Ubuntu 12.04 LTS Server Benchmark v1.1.0

## Profile

Level 1 - Scored