Описание
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.
| Релиз | Статус | Примечание |
|---|---|---|
| bionic | ignored | end of standard support |
| devel | deferred | |
| esm-infra-legacy/trusty | deferred | |
| esm-infra/bionic | deferred | |
| esm-infra/focal | deferred | |
| esm-infra/xenial | deferred | |
| focal | ignored | end of standard support, was deferred |
| jammy | deferred | |
| kinetic | ignored | end of life, was deferred [2024-05-27] |
| lunar | ignored | end of life, was deferred [2024-05-27] |
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| Релиз | Статус | Примечание |
|---|---|---|
| bionic | ignored | end of standard support |
| devel | deferred | |
| esm-infra/bionic | deferred | |
| esm-infra/focal | deferred | |
| esm-infra/xenial | deferred | |
| focal | ignored | end of standard support, was deferred |
| jammy | deferred | |
| kinetic | ignored | end of life, was deferred [2024-05-27] |
| lunar | ignored | end of life, was deferred [2024-05-27] |
| mantic | ignored | end of life, was deferred [2024-05-27] |
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9.8 Critical
CVSS3
Связанные уязвимости
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.
pam_krb5 authenticates a user by essentially running kinit with the pa ...
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.
Уязвимость модуля pam_krb5 операционных систем FreeBSD, позволяющая нарушителю получить несанкционированный доступ к системе
9.8 Critical
CVSS3