用 Codex 或 Claude 帮你安装 复制这段 Prompt，粘贴到 Codex、Claude 或其他助手里，让它检查 Skill 页面并帮你完成安装。
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npx skills add https://github.com/CyberStrikeus/CyberStrike --skill cis-ubuntu2004-v300-5-3-2-3命令会保持在同一行。复制前请横向滚动并检查完整内容。
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基于 SOC 职业分类
正在显示 SKILL.md
| name | cis-ubuntu2004-v300-5-3-2-3 |
| description | Ensure pam_pwquality module is enabled |
| category | cis-iam |
| version | 3.0.0 |
| author | cyberstrike-official |
| tags | ["cis","ubuntu","linux","ubuntu-20.04","pam","authentication"] |
| cis_id | 5.3.2.3 |
| cis_benchmark | CIS Ubuntu Linux 20.04 LTS Benchmark v3.0.0 |
| tech_stack | ["ubuntu","linux"] |
| cwe_ids | [] |
| chains_with | [] |
| prerequisites | [] |
| severity_boost | {} |
The pam_pwquality.so module performs password quality checking. This module can be plugged into the password stack of a given service to provide strength-checking for passwords. The code was originally based on pam_cracklib module and the module is backwards compatible with its options.
The action of this module is to prompt the user for a password and check its strength against a system dictionary and a set of rules for identifying poor choices.
The first action is to prompt for a single password, check its strength and then, if it is considered strong, prompt for the password a second time (to verify that it was typed correctly on the first occasion). All being well, the password is passed on to subsequent modules to be installed as the new authentication token.
Use of a unique, complex passwords helps to increase the time and resources required to compromise the password.
Run the following command to verify that pam_pwquality is enabled:
# grep -P -- '\bpam_pwquality\.so\b' /etc/pam.d/common-password
Output should be similar to:
password requisite pam_pwquality.so retry=3
Run the following script to verify the pam_pwquality.so line exists in a pam-auth-update profile:
# grep -P -- '\bpam_pwquality\.so\b' /usr/share/pam-configs/*
Output should be similar to:
/usr/share/pam-configs/pwquality: requisite pam_pwquality.so retry=3
/usr/share/pam-configs/pwquality: requisite pam_pwquality.so retry=3
/etc/pam.d/common-password with the returned profile:# pam-auth-update --enable {PROFILE_NAME}
Example:
# pam-auth-update pwquality
/usr/share/pam-configs/ with the following lines:Name: Pwquality password strength checking
Default: yes
Priority: 1024
Conflicts: cracklib
Password-Type: Primary
Password:
requisite pam_pwquality.so retry=3
Example:
#!/usr/bin/env bash
{
arr=('Name: Pwquality password strength checking' 'Default: yes' 'Priority: 1024' 'Conflicts: cracklib' 'Password-Type: Primary' 'Password:' ' requisite pam_pwquality.so retry=3')
printf '%s\n' "${arr[@]}" > /usr/share/pam-configs/pwquality
}
Run the following command to update /etc/pam.d/common-password with the pwquality profile:
# pam-auth-update --enable pwquality
Note:
pam-auth-update --enable commandName: line should be easily recognizable and understoodPriority: Line is important as it effects the order of the lines in the /etc/pam.d/ filespam_pwquality module, enable that module insteadNone listed.
| Controls Version | Control | IG 1 | IG 2 | IG 3 |
|---|---|---|---|---|
| v8 | 5.2 Use Unique Passwords | * | * | * |
| v7 | 4.4 Use Unique Passwords | * | * |
| Techniques / Sub-techniques | Tactics | Mitigations |
|---|---|---|
| T1110, T1110.001, T1110.002, T1110.003, T1178.001, T1178.002, T1178.003, T1178.004 | TA0006 | M1027 |