CVE-2023-3326
pam_krb5 authenticates a user by essentially running kinit with the pa ...
Severity by source
Trivy's own label is CRITICAL. Rated critical by NVD. Rated lower by Ubuntu (low).
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 packages and fixed versions
| Source | Package | Fixed in |
|---|---|---|
| debian 11 | libpam-krb5 | no fix listed |
| debian 12 | libpam-krb5 | no fix listed |
| debian 13 | libpam-krb5 | no fix listed |
| debian 14 | libpam-krb5 | no fix listed |
| echo | libpam-krb5 | no fix listed |
| rapidfort debian 12 | libpam-krb5 | no fix listed |
| rapidfort debian 13 | libpam-krb5 | no fix listed |
| rapidfort ubuntu 20.04 | libpam-krb5, sssd | no fix listed |
| rapidfort ubuntu 22.04 | libpam-krb5, sssd | no fix listed |
| rapidfort ubuntu 24.04 | libpam-krb5, sssd | no fix listed |
| ubuntu 18.04-ESM | libpam-krb5, sssd | no fix listed |
| ubuntu 20.04-ESM | libpam-krb5, sssd | no fix listed |
Show all 25 entries from 16 sources
| Source | Package | Fixed in |
|---|---|---|
| debian 11 | libpam-krb5 | no fix listed |
| debian 12 | libpam-krb5 | no fix listed |
| debian 13 | libpam-krb5 | no fix listed |
| debian 14 | libpam-krb5 | no fix listed |
| echo | libpam-krb5 | no fix listed |
| rapidfort debian 12 | libpam-krb5 | no fix listed |
| rapidfort debian 13 | libpam-krb5 | no fix listed |
| rapidfort ubuntu 20.04 | libpam-krb5 | no fix listed |
| rapidfort ubuntu 20.04 | sssd | no fix listed |
| rapidfort ubuntu 22.04 | libpam-krb5 | no fix listed |
| rapidfort ubuntu 22.04 | sssd | no fix listed |
| rapidfort ubuntu 24.04 | libpam-krb5 | no fix listed |
| rapidfort ubuntu 24.04 | sssd | no fix listed |
| ubuntu 18.04-ESM | libpam-krb5 | no fix listed |
| ubuntu 18.04-ESM | sssd | no fix listed |
| ubuntu 20.04-ESM | libpam-krb5 | no fix listed |
| ubuntu 20.04-ESM | sssd | no fix listed |
| ubuntu 22.04 | libpam-krb5 | no fix listed |
| ubuntu 22.04 | sssd | no fix listed |
| ubuntu 24.04 | libpam-krb5 | no fix listed |
| ubuntu 24.04 | sssd | no fix listed |
| ubuntu 26.04 | libpam-krb5 | no fix listed |
| ubuntu 26.04 | sssd | no fix listed |
| ubuntu 26.10 | libpam-krb5 | no fix listed |
| ubuntu 26.10 | sssd | no fix listed |