CVEvulnerability

CVE-2023-3326

9.8 CRITICAL Published 2023-06-22 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2023-06-22
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
9.8 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weaknesses
CWE-287, CWE-303

Description

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.

Affected configurations

• freebsd freebsd (< 12.4) • freebsd freebsd (>= 13.0 < 13.1) • freebsd freebsd 12.4 • freebsd freebsd 13.1 • freebsd freebsd 13.2

Related

Weakness · CWE (2)

  • CWE-287 Improper Authentication weakness
  • CWE-303 Incorrect Implementation of Authentication Algorithm weakness

References