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Verify PAM is configured to remember at least 5 previous passwords to prevent reuse
默认使用会先检查来源的 Prompt；你也可以切换为直接命令，或下载本地副本。
决定是否安装前，请先阅读 SKILL.md，以及 SkillsMP 当前展示的配套文件。
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。
直接命令不会经过审查 Prompt；运行前请先检查来源。
npx skills add https://github.com/CyberStrikeus/CyberStrike --skill cis-ubuntu-14-04-lts-5-3-3-ensure-password-reuse-is-limited命令会保持在同一行。复制前请横向滚动并检查完整内容。
想先保存到本地？可下载 SkillsMP 当前能够提供的文件。
macOS post-exploitation for credential harvesting, DTrace monitoring, TCC bypass, and stealth operations via native tools
Windows userland post-exploitation for credential harvesting, monitoring, AMSI/ETW bypass, and stealth operations
Kubernetes post-exploitation for container escape, secret extraction, RBAC abuse, and cluster persistence
基于 SOC 职业分类
正在显示 SKILL.md
| name | CIS Ubuntu 14.04 LTS - 5.3.3 Ensure password reuse is limited |
| description | Verify PAM is configured to remember at least 5 previous passwords to prevent reuse |
| category | cis-os-hardening |
| version | 2.1.0 |
| author | cyberstrike-official |
| tags | ["cis","ubuntu","ubuntu-14.04","level-1","scored","pam"] |
| cis_id | 5.3.3 |
| cis_benchmark | CIS Ubuntu Linux 14.04 LTS Benchmark v2.1.0 |
| tech_stack | ["ubuntu","linux"] |
| cwe_ids | [] |
| chains_with | [] |
| prerequisites | [] |
| severity_boost | medium |
The /etc/security/opasswd file stores the users' old passwords and can be checked to ensure that users are not recycling recent passwords.
Forcing users not to reuse their past 5 passwords make it less likely that an attacker will be able to guess the password.
Note that these change only apply to accounts configured on the local system.
Run the following commands and ensure the remember option is '5' or more and included in all results:
egrep '^password\s+required\s+pam_pwhistory.so' /etc/pam.d/common-password
password required pam_pwhistory.so remember=5
Edit the /etc/pam.d/common-password file to include the remember option and conform to site policy as shown:
password required pam_pwhistory.so remember=5
No password reuse limit configured by default.