Bug 1905565 (CVE-2020-35518) - CVE-2020-35518 389-ds-base: information disclosure during the binding of a DN
Summary: CVE-2020-35518 389-ds-base: information disclosure during the binding of a DN
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2020-35518
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1904991 1908653 1908705 1910941 1918135 1923217 1930272 1931182 1946632
Blocks: 1905546 1939997
TreeView+ depends on / blocked
 
Reported: 2020-12-08 14:57 UTC by Cedric Buissart
Modified: 2022-04-17 21:04 UTC (History)
12 users (show)

Fixed In Version: 389-ds-base 2.0.3, 389-ds-base 1.4.4.13, 389-ds-base 1.4.3.19
Clone Of:
Environment:
Last Closed: 2021-04-06 17:35:19 UTC
Embargoed:


Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2021:0599 0 None None None 2021-02-16 18:30:29 UTC
Red Hat Product Errata RHSA-2021:2323 0 None None None 2021-06-08 22:35:50 UTC

Description Cedric Buissart 2020-12-08 14:57:18 UTC
When binding against a DN during authentication, the reply from 389-ds-base will be different whether the DN exists or not. This can be used by an unauthenticated attacker to check the existence of an entry in the LDAP database.

Comment 4 Cedric Buissart 2020-12-17 09:31:34 UTC
Created 389-ds-base tracking bugs for this issue:

Affects: fedora-all [bug 1908653]

Comment 12 Salvatore Bonaccorso 2021-01-21 21:59:42 UTC
Hi Cedric,

is there by chance an upstrema reference for this? Was this already fixed?

Regards,
Salvatore

Comment 13 mreynolds 2021-01-21 22:15:29 UTC
(In reply to Salvatore Bonaccorso from comment #12)
> Hi Cedric,
> 
> is there by chance an upstrema reference for this? Was this already fixed?
> 
> Regards,
> Salvatore

This was fixed upstream via: 

https://github.com/389ds/389-ds-base/issues/4480

Comment 14 Salvatore Bonaccorso 2021-01-22 05:23:25 UTC
Hi

(In reply to mreynolds from comment #13)
> (In reply to Salvatore Bonaccorso from comment #12)
> > Hi Cedric,
> > 
> > is there by chance an upstrema reference for this? Was this already fixed?
> > 
> > Regards,
> > Salvatore
> 
> This was fixed upstream via: 
> 
> https://github.com/389ds/389-ds-base/issues/4480

Thank you.

Regards,
Salvatore

Comment 15 Cedric Buissart 2021-01-22 08:14:54 UTC
I am not sure this fix is sufficient.
Last time I checked, I could still deduce the existence of an object without authenticating.

Comment 16 thierry bordaz 2021-01-22 08:25:36 UTC
(In reply to Cedric Buissart from comment #15)
> I am not sure this fix is sufficient.
> Last time I checked, I could still deduce the existence of an object without
> authenticating.

Hi Cedric, I think it is. I answered one of the concern https://bugzilla.redhat.com/show_bug.cgi?id=1904991#c12. Is it the concern your were thinking of when saying the fix is not sufficient ?

Comment 17 errata-xmlrpc 2021-02-16 18:30:27 UTC
This issue has been addressed in the following products:

  Red Hat Directory Server 11.1 for RHEL 8

Via RHSA-2021:0599 https://access.redhat.com/errata/RHSA-2021:0599

Comment 19 errata-xmlrpc 2021-04-06 14:06:24 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2021:1086 https://access.redhat.com/errata/RHSA-2021:1086

Comment 20 Product Security DevOps Team 2021-04-06 17:35:19 UTC
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2020-35518

Comment 22 errata-xmlrpc 2021-04-19 09:54:28 UTC
This issue has been addressed in the following products:

  Red Hat Directory Server 11.2 for RHEL 8

Via RHSA-2021:1243 https://access.redhat.com/errata/RHSA-2021:1243

Comment 23 errata-xmlrpc 2021-04-19 15:49:49 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.2 Extended Update Support

Via RHSA-2021:1258 https://access.redhat.com/errata/RHSA-2021:1258

Comment 24 errata-xmlrpc 2021-06-08 22:35:49 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2021:2323 https://access.redhat.com/errata/RHSA-2021:2323


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