cis-ubuntu1204-v110-13-2

DevOps & Security

Verify No Legacy "+" Entries Exist in /etc/passwd File

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Prompt to paste

I want to install this Agent Skill for this project in Codex.

Source SKILL.md: https://github.com/CyberStrikeus/CyberStrike/blob/HEAD/.cyberstrike/skill/CIS_benchmarks/Operating_Systems/Ubuntu/CIS_Ubuntu_12.04_LTS_Server_Benchmark_v1.1.0/cis-ubuntu1204-v110-13-2/SKILL.md

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First, summarize what it does, its dependencies, license status if identifiable, and any risks. Show the exact files you propose to add under .agents/skills/cis-ubuntu1204-v110-13-2/. Do not write files or run scripts until I approve.

After I approve, install the complete skill folder, including required referenced files, into that project location. Verify it is discoverable, then tell me its actual invocation name and how to use it. Do not claim it is installed until you have verified it.

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13.2 Verify No Legacy "+" Entries Exist in /etc/passwd File (Scored)

Profile Applicability

Level 1

Description

The character + in various files used to be markers for systems to insert data from NIS maps at a certain point in a system configuration file. These entries are no longer required on most systems, but may exist in files that have been imported from other platforms.

Rationale

These entries may provide an avenue for attackers to gain privileged access on the system.

Audit Procedure

Using Command Line

Run the following command and verify that no output is returned:

/bin/grep '^+:' /etc/passwd

Expected Result

No output should be returned. Any output indicates legacy + entries exist in /etc/passwd.

Remediation

Using Command Line

Delete these entries if they exist.

Default Value

No legacy + entries exist in /etc/passwd by default on Ubuntu 12.04.

References

CIS Ubuntu 12.04 LTS Server Benchmark v1.1.0

Profile

Level 1 - Scored