{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2023-3326","assignerOrgId":"63664ac6-956c-4cba-a5d0-f46076e16109","state":"PUBLISHED","assignerShortName":"freebsd","dateReserved":"2023-06-19T16:14:36.133Z","datePublished":"2023-06-22T16:37:51.360Z","dateUpdated":"2024-12-05T17:45:19.729Z"},"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","modules":["pam_krb5"],"product":"FreeBSD","vendor":"FreeBSD","versions":[{"lessThan":"13.2-RELEASE-p1","status":"affected","version":"13.2-RELEASE","versionType":"release"},{"lessThan":"13.1-RELEASE-p8","status":"affected","version":"13.1-RELEASE","versionType":"release"},{"lessThan":"12.4-RELEASE-p3","status":"affected","version":"12.4-RELEASE","versionType":"release"}]}],"configurations":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"<div>Exposure only occurs if pam_krb5 is enabled in the PAM configuration, an /etc/krb5.conf is installed, and the system does not have a system keytab.</div><div><br></div><div>For FreeBSD, the default installation has pam_krb5 commented out and does not have an /etc/krb5.conf.</div>"}],"value":"Exposure only occurs if pam_krb5 is enabled in the PAM configuration, an /etc/krb5.conf is installed, and the system does not have a system keytab.\n\n\n\n\nFor FreeBSD, the default installation has pam_krb5 commented out and does not have an /etc/krb5.conf.\n\n"}],"credits":[{"lang":"en","type":"finder","user":"00000000-0000-4000-9000-000000000000","value":"Taylor R Campbell <riastradh@NetBSD.org>"}],"datePublic":"2023-06-21T06:00:00.000Z","descriptions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"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.<br>"}],"value":"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.\n"}],"impacts":[{"capecId":"CAPEC-114","descriptions":[{"lang":"en","value":"CAPEC-114 Authentication Abuse"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-303","description":"CWE-303  Incorrect Implementation of Authentication Algorithm","lang":"en","type":"CWE"}]}],"providerMetadata":{"orgId":"63664ac6-956c-4cba-a5d0-f46076e16109","shortName":"freebsd","dateUpdated":"2023-08-01T22:40:58.267Z"},"references":[{"tags":["vendor-advisory"],"url":"https://security.FreeBSD.org/advisories/FreeBSD-SA-23:04.pam_krb5.asc"},{"tags":["third-party-advisory"],"url":"https://security.netapp.com/advisory/ntap-20230714-0005/"},{"tags":["vendor-advisory"],"url":"https://security.FreeBSD.org/advisories/FreeBSD-SA-23:09.pam_krb5.asc"}],"source":{"advisory":"FreeBSD-SA-23:04.pam_krb5","discovery":"UNKNOWN"},"title":"Network authentication attack via pam_krb5","workarounds":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"If you are not using Kerberos at all, ensure /etc/krb5.conf is missing from your system. Additionally, ensure pam_krb5 is commented out of your PAM configuration located as documented in pam.conf(5), generally /etc/pam.d. Note, the default FreeBSD PAM configuration has pam_krb5 commented out.<br><br>If you are using Kerberos, but not using pam_krb5, ensure pam_krb5 is commented out of your PAM configuration located as documented in pam.conf(5), generally /etc/pam.d. Note, the default FreeBSD PAM configuration has pam_krb5 commented out.<br><br>If you are using pam_krb5, ensure you have a keytab on your system as provided by your Kerberos administrator.<br>"}],"value":"If you are not using Kerberos at all, ensure /etc/krb5.conf is missing from your system. Additionally, ensure pam_krb5 is commented out of your PAM configuration located as documented in pam.conf(5), generally /etc/pam.d. Note, the default FreeBSD PAM configuration has pam_krb5 commented out.\n\nIf you are using Kerberos, but not using pam_krb5, ensure pam_krb5 is commented out of your PAM configuration located as documented in pam.conf(5), generally /etc/pam.d. Note, the default FreeBSD PAM configuration has pam_krb5 commented out.\n\nIf you are using pam_krb5, ensure you have a keytab on your system as provided by your Kerberos administrator.\n"}],"x_generator":{"engine":"Vulnogram 0.1.0-dev"}},"adp":[{"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2024-08-02T06:55:03.226Z"},"title":"CVE Program Container","references":[{"tags":["vendor-advisory","x_transferred"],"url":"https://security.FreeBSD.org/advisories/FreeBSD-SA-23:04.pam_krb5.asc"},{"tags":["third-party-advisory","x_transferred"],"url":"https://security.netapp.com/advisory/ntap-20230714-0005/"},{"tags":["vendor-advisory","x_transferred"],"url":"https://security.FreeBSD.org/advisories/FreeBSD-SA-23:09.pam_krb5.asc"}]},{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2024-12-05T17:45:11.407919Z","id":"CVE-2023-3326","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2024-12-05T17:45:19.729Z"}}]}}