CVE-2019-19522 Privilege escalation in n/a

High 7.8 Published 4 Dec 2019 Updated 5 Aug 2024

Local users in the auth group can escalate to root in OpenBSD when S/Key or YubiKey authentication is enabled due to insecure file permissions.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2019-19522?

CVE-2019-19522 is a high-severity vulnerability in Openbsd Openbsd, published on 4 Dec 2019. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

OpenBSD 6.6, in a non-default configuration where S/Key or YubiKey authentication is enabled, allows local users to become root by leveraging membership in the auth group. This occurs because root's file can be written to /etc/skey or /var/db/yubikey, and need not be owned by root.

Weakness: CWE-732

Which versions are affected by CVE-2019-19522?

It affects 1 product.

Products include Openbsd Openbsd.

How do I fix CVE-2019-19522?

No fix has been published for CVE-2019-19522 yet. Limit exposure of the affected software until one is available.

Is CVE-2019-19522 being exploited?

There is no known exploitation of CVE-2019-19522 in the wild and no public exploit code.

All Openbsd Openbsd vulnerabilities

Sources

Also known as GHSA-w448-mv88-mx78.