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 :

Aug. 1, 2023, 11:15 p.m.

Remotely Exploitable :

Yes !

Impact Score :

5.9

Exploitability Score :

3.9
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

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2023-3326.

URL Resource
https://security.FreeBSD.org/advisories/FreeBSD-SA-23:04.pam_krb5.asc Mitigation Vendor Advisory
https://security.FreeBSD.org/advisories/FreeBSD-SA-23:09.pam_krb5.asc
https://security.netapp.com/advisory/ntap-20230714-0005/ Third Party Advisory

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).

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 [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.

0.20 }} 0.02%

score

0.58058

percentile

CVSS31 - Vulnerability Scoring System
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