GHSA-VJHP-527W-C5VJ
Vulnerability from github – Published: 2023-06-22 18:30 – Updated: 2024-04-04 05:01pam_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.
{
"affected": [],
"aliases": [
"CVE-2023-3326"
],
"database_specific": {
"cwe_ids": [
"CWE-287",
"CWE-303"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2023-06-22T17:15:44Z",
"severity": "CRITICAL"
},
"details": "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",
"id": "GHSA-vjhp-527w-c5vj",
"modified": "2024-04-04T05:01:18Z",
"published": "2023-06-22T18:30:25Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-3326"
},
{
"type": "WEB",
"url": "https://security.FreeBSD.org/advisories/FreeBSD-SA-23:04.pam_krb5.asc"
},
{
"type": "WEB",
"url": "https://security.FreeBSD.org/advisories/FreeBSD-SA-23:09.pam_krb5.asc"
},
{
"type": "WEB",
"url": "https://security.netapp.com/advisory/ntap-20230714-0005"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
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