9.8
CRITICAL
CVE-2023-3326
FreeBSD pam_krb5 Kerberos Authentication Bypass
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.

INFO

Published Date :

June 22, 2023, 5:15 p.m.

Last Modified :

Nov. 21, 2024, 8:17 a.m.

Remotely Exploitable :

Yes !

Impact Score :

5.9

Exploitability Score :

3.9
Public PoC/Exploit Available at Github

CVE-2023-3326 has a 1 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

Affected Products

The following products are affected by CVE-2023-3326 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Freebsd freebsd
References to Advisories, Solutions, and Tools

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

installing and configuring wazuh

Updated: 1 week, 6 days ago
0 stars 0 fork 0 watcher
Born at : April 12, 2025, 4:57 p.m. This repo has been linked 2 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2023-3326 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2023-3326 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference https://security.FreeBSD.org/advisories/FreeBSD-SA-23:04.pam_krb5.asc
    Added Reference https://security.FreeBSD.org/advisories/FreeBSD-SA-23:09.pam_krb5.asc
    Added Reference https://security.netapp.com/advisory/ntap-20230714-0005/
  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    Aug. 01, 2023

    Action Type Old Value New Value
    Added Reference https://security.FreeBSD.org/advisories/FreeBSD-SA-23:09.pam_krb5.asc [No Types Assigned]
  • Modified Analysis by [email protected]

    Jul. 21, 2023

    Action Type Old Value New Value
    Changed Reference Type https://security.netapp.com/advisory/ntap-20230714-0005/ No Types Assigned https://security.netapp.com/advisory/ntap-20230714-0005/ Third Party Advisory
  • CVE Modified by [email protected]

    Jul. 18, 2023

    Action Type Old Value New Value
    Added Reference https://security.netapp.com/advisory/ntap-20230714-0005/ [No Types Assigned]
  • Initial Analysis by [email protected]

    Jun. 30, 2023

    Action Type Old Value New Value
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    Changed Reference Type https://security.FreeBSD.org/advisories/FreeBSD-SA-23:04.pam_krb5.asc No Types Assigned https://security.FreeBSD.org/advisories/FreeBSD-SA-23:04.pam_krb5.asc Mitigation, Vendor Advisory
    Added CWE NIST CWE-287
    Added CPE Configuration OR *cpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:* versions up to (excluding) 12.4 *cpe:2.3:o:freebsd:freebsd:12.4:-:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:12.4:p1:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:12.4:p2:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:12.4:rc2-p1:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:12.4:rc2-p2:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:* versions from (including) 13.0 up to (excluding) 13.1 *cpe:2.3:o:freebsd:freebsd:13.1:-:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:13.1:b1-p1:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:13.1:b2-p2:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:13.1:p1:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:13.1:p2:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:13.1:p3:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:13.1:p4:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:13.1:p5:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:13.1:p6:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:13.1:p7:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:13.1:rc1-p1:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:13.2:-:*:*:*:*:*:*
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.28 }} -0.29%

score

0.50542

percentile

CVSS31 - Vulnerability Scoring System
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Latest DB Update: Apr. 29, 2025 19:12