Vulnerability Description
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.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Freebsd | Freebsd | < 12.4 |
Related Weaknesses (CWE)
References
- https://security.FreeBSD.org/advisories/FreeBSD-SA-23:04.pam_krb5.ascMitigationVendor Advisory
- https://security.FreeBSD.org/advisories/FreeBSD-SA-23:09.pam_krb5.asc
- https://security.netapp.com/advisory/ntap-20230714-0005/Third Party Advisory
- https://security.FreeBSD.org/advisories/FreeBSD-SA-23:04.pam_krb5.ascMitigationVendor Advisory
- https://security.FreeBSD.org/advisories/FreeBSD-SA-23:09.pam_krb5.asc
- https://security.netapp.com/advisory/ntap-20230714-0005/Third Party Advisory
FAQ
What is CVE-2023-3326?
CVE-2023-3326 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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 verif...
How severe is CVE-2023-3326?
CVE-2023-3326 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2023-3326?
Check the references section above for vendor advisories and patch information. Affected products include: Freebsd Freebsd.