On 07/07/2022 07:24, Aki Tuomi wrote:
On 06/07/2022 16:54 EEST Aki Tuomi via Dovecot-news
<dovecot-n...@dovecot.org> wrote:
Affected product: Dovecot IMAP Server
Internal reference: DOV-5320
Vulnerability type: Improper Access Control (CWE-284)
Vulnerable version: 2.2
Vulnerable component: submission
Report confidence: Confirmed
Solution status: Fixed in main
Researcher credits: Julian Brook (julezman)
Vendor notification: 2022-05-06
CVE reference: CVE-2022-30550
CVSS: 6.8 (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N)
Vulnerability Details:
When two passdb configuration entries exist in Dovecot configuration,
which have the same driver and args settings, the incorrect
username_filter and mechanism settings can be applied to passdb
definitions. These incorrectly applied settings can lead to an
unintended security configuration and can permit privilege escalation
with certain configurations involving master user authentication.
Dovecot documentation does not advise against the use of passdb
definitions which have the same driver and args settings. One such
configuration would be where an administrator wishes to use the same
pam configuration or passwd file for both normal and master users but
use the username_filter setting to restrict which of the users is able
to be a master user.
Risk:
If same passwd file or PAM is used for both normal and master users,
it is possible for attacker to become master user.
Workaround:
Always authenticate master users from different source than regular
users, e.g. using a separate passwd file. Alternatively, you can use
global ACLs to ensure that only legimate master users have priviledged
access.
Fix:
This has been fixed in main branch. See
https://github.com/dovecot/core/compare/7bad6a24%5E..a1022072.patch
Two small corrections to this CVE notice... The service impacted is of
course 'auth' not 'submission', and the version impacted is from 2.2 to
2.3.19.1.
Aki
I wouldnt exactly call them " small " corrections
its like saying the left window on your 2020 car can be pushed down
easily to saying oh wait its every window and you dont need a key to
start the engine and btw its all cars from 2010 to 2022
And if its that serious where is the release, thats how dealing with
CVE's works Aki, not a CVE statement saying go to gitbub.
That said, I'd assume everyone uses a separate db for support teams
anyway, or I'd hope so/
--
Regards,
Noel Butler
This Email, including attachments, may contain legally privileged
information, therefore at all times remains confidential and subject to
copyright protected under international law. You may not disseminate
this message without the authors express written authority to do so.
If you are not the intended recipient, please notify the sender then
delete all copies of this message including attachments immediately.
Confidentiality, copyright, and legal privilege are not waived or lost
by reason of the mistaken delivery of this message.