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Verify that XD/NX (Execute Disable/No Execute) CPU protection is enabled to prevent buffer overflow exploitation
デフォルトでは、最初にソースを確認する Prompt が選択されています。直接コマンドに切り替えるか、ローカルコピーをダウンロードすることもできます。
インストールを決める前に、SKILL.md と SkillsMP に表示されている付属ファイルをお読みください。
Codex または Claude でインストール この Prompt をコピーして Codex、Claude、または他のアシスタントに貼り付けると、Skill ページを確認してインストールできます。
直接コマンドでは確認用 Prompt が省略されます。実行前にソースを確認してください。
npx skills add https://github.com/CyberStrikeus/CyberStrike --skill cis-ubuntu-14-04-lts-1-5-2-ensure-xd-nx-support-is-enabledコマンドは1行のまま表示されます。コピー前に横へスクロールして全体を確認してください。
ローカルで確認しますか？SkillsMP が現在取得できるファイルをダウンロードできます。
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
SOC 職業分類に基づく
SKILL.md を表示中
| name | CIS Ubuntu 14.04 LTS - 1.5.2 Ensure XD/NX support is enabled |
| description | Verify that XD/NX (Execute Disable/No Execute) CPU protection is enabled to prevent buffer overflow exploitation |
| category | cis-os-hardening |
| version | 2.1.0 |
| author | cyberstrike-official |
| tags | ["cis","ubuntu","ubuntu-14.04","level-1","not-scored","hardening"] |
| cis_id | 1.5.2 |
| cis_benchmark | CIS Ubuntu Linux 14.04 LTS Benchmark v2.1.0 |
| tech_stack | ["ubuntu","linux"] |
| cwe_ids | [] |
| chains_with | [] |
| prerequisites | [] |
| severity_boost | medium |
Recent processors in the x86 family support the ability to prevent code execution on a per memory page basis. Generically and on AMD processors, this ability is called No Execute (NX), while on Intel processors it is called Execute Disable (XD). This ability can help prevent exploitation of buffer overflow vulnerabilities and should be activated whenever possible. Extra steps must be taken to ensure that this protection is enabled, particularly on 32-bit x86 systems. Other processors, such as Itanium and POWER, have included such support since inception and the standard kernel for those platforms supports the feature.
Enabling any feature that can protect against buffer overflow attacks enhances the security of the system.
Run the following command and verify your kernel has identified and activated NX/XD protection:
dmesg | grep NX
NX (Execute Disable) protection: active
On 32 bit systems install a kernel with PAE support, no installation is required on 64 bit systems. If necessary configure your bootloader to load the new kernel and reboot the system. You may need to enable NX or XD support in your bios.
Enabled on 64-bit systems by default.
Ensure your system supports the XD or NX bit and has PAE support before implementing this recommendation as this may prevent it from booting if these are not supported by your hardware.