摘要:
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.
安全等级: Low
公告ID: KylinSec-SA-2023-1498
发布日期: 2023年7月5日
关联CVE: CVE-2023-3326
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.
| cve名称 | 产品 | 组件 | 是否受影响 |
|---|---|---|---|
| CVE-2023-3326 | KY3.4-4A | pam_krb5 | Unaffected |
| CVE-2023-3326 | KY3.4-5A | pam_krb5 | Unaffected |
| CVE-2023-3326 | KY3.5.1 | pam_krb5 | Unaffected |
| CVE-2023-3326 | KY3.5.2 | pam_krb5 | Unaffected |
