What is Privilege Escalation? Types, Causes & Protection

Types of privilege escalation

There are two main types of privilege escalation: vertical and horizontal.

Vertical privilege escalation

Here, an attacker gets higher rights than their role should have. For example, a normal user might gain admin rights.

Horizontal privilege escalation

Here, an attacker gets the same level of rights, but for another user's account. This is common when users have the same rights but want data or functions from other accounts.

Common causes of privilege escalation

• Vulnerabilities in software and operating systems: Often caused by security flaws that were never patched.
• Faulty configurations: Wrong security settings give users more access than planned.
• Inadequate access controls: Rules for sign-in and for who may do what are missing or weak.

Protective measures against privilege escalation

• Regular audits and penetration tests: They find weak spots before attackers can exploit them.
• Principle of least privilege: Users get only the rights they need for their tasks, and no more.
• Strong access controls: Use strong sign-in methods, including multi-factor authentication.
• Regular security updates & patches: Keep all software up to date and free of known flaws.

Handling privilege escalation risks properly

The threat from privilege escalation is growing. So you need to act early and put broad security policies in place. This means finding and fixing security gaps on a regular basis. It also means making sure all users get the right training.

Proven practices

• Separate privileged accounts: Admins use a separate account for admin tasks, not their everyday account.
• Privileged access management (PAM): Manage privileged access in one place, limit it in time and log it.
• Review permissions regularly: Remove rights that are no longer needed. Delete orphaned accounts.
• Harden systems: Turn off services you do not need, change default passwords and enforce secure baseline settings.
• Monitoring: Log and review changes to group memberships and rights. Watch for unusual logins too.

Typical challenges

In many environments, permissions have grown over years. They are hard to keep track of. Some older apps also still need local admin rights. A step-by-step cleanup helps lower the risk in a controlled way. Start with the most critical systems and accounts.

Conclusion

Privilege escalation is a critical security risk. If you do not keep it in check, it can easily cause serious damage. Learn how attackers extend their rights in a system, and put strong security measures in place. That way companies can protect their systems better.

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📌 Related terms: security vulnerability, user authentication

Your next step

Our experts help you find paths to privilege escalation in your environment. We use penetration tests and reviews of your permission concepts, for example. Then we help you put the right countermeasures in place. Contact us for a no-obligation talk.