pam_krb5 authenticates a user by essentially running kinit with the password, getting a ticket-granting ticket (tgt) from the Kerberos KDC (Key Distribution Center) over the network, as a way to verify the password. However, if a keytab is not provisioned on the system, pam_krb5 has no way to validate the response from the KDC, and essentially trusts the tgt provided over the network as being valid. In a non-default FreeBSD installation that leverages pam_krb5 for authentication and does not have a keytab provisioned, an attacker that is able to control both the password and the KDC responses can return a valid tgt, allowing authentication to occur for any user on the system.
Metrics
Affected Vendors & Products
References
History
No history.
MITRE
Status: PUBLISHED
Assigner: freebsd
Published: 2023-06-22T16:37:51.360Z
Updated: 2024-08-02T06:55:03.226Z
Reserved: 2023-06-19T16:14:36.133Z
Link: CVE-2023-3326
Vulnrichment
No data.
NVD
Status : Modified
Published: 2023-06-22T17:15:44.833
Modified: 2023-08-01T23:15:30.827
Link: CVE-2023-3326
Redhat
No data.