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.
References
| Link | Resource |
|---|---|
| https://security.FreeBSD.org/advisories/FreeBSD-SA-23:04.pam_krb5.asc | Mitigation Vendor 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.asc | Mitigation Vendor Advisory |
| https://security.FreeBSD.org/advisories/FreeBSD-SA-23:09.pam_krb5.asc | |
| https://security.netapp.com/advisory/ntap-20230714-0005/ | Third Party Advisory |
Configurations
Configuration 1 (hide)
|
History
21 Nov 2024, 08:17
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://security.FreeBSD.org/advisories/FreeBSD-SA-23:04.pam_krb5.asc - Mitigation, Vendor Advisory | |
| References | () https://security.FreeBSD.org/advisories/FreeBSD-SA-23:09.pam_krb5.asc - | |
| References | () https://security.netapp.com/advisory/ntap-20230714-0005/ - Third Party Advisory |
Information
Published : 2023-06-22 17:15
Updated : 2024-11-21 08:17
NVD link : CVE-2023-3326
Mitre link : CVE-2023-3326
CVE.ORG link : CVE-2023-3326
JSON object : View
Products Affected
freebsd
- freebsd