[Fedora-directory-users] Limiting Directory Manager (nsslapd-rootdn) by source host (e.g. 127.0.0.1)?

[Aleksander Adamowski]

Hi!

The Direcroty Manager account (the one whose DN is specified in dse.ldif 
as nsslapd-rootdn) is a dangerously privileged account.

Access control does not apply to this user and compromising its DN and 
password gives full control over the directory server.

Therefore, it would be desirable to limit this user's bind access based 
on some additional criteria, in addition to the knowledge of the password.

Limits based on the source host (e.g. localhost) and time of day (e.g. 
only work hours) would be very useful.

Is there a way to limit Directory Manager binds based on those criteria 
in Fedora Directory Server?

Note that in OpenLDAP this is possible using the following ACL:

access to dn.base="cn=Manager,o=Example"
  by peername.regex=127.0.0.1 auth
  by users none
  by anonymous none

This ACL however requires creating a concrete LDAP entry that 
corresponds to rootdn, setting a userPassword in taht entry, and leaving 
the rootpw in OpenLDAP configuration undefined.
This way the concrete userPassword is used when binding and is subject 
to that ACL which only allows access from connections that origin from 
127.0.0.1.

More details in this post on OpenLDAP mailing list:
http://www.openldap.org/lists/openldap-software/200711/msg00342.html

[Rich Megginson]

Aleksander Adamowski wrote:
> Hi!
>
> The Direcroty Manager account (the one whose DN is specified in 
> dse.ldif as nsslapd-rootdn) is a dangerously privileged account.
>
> Access control does not apply to this user and compromising its DN and 
> password gives full control over the directory server.
>
> Therefore, it would be desirable to limit this user's bind access 
> based on some additional criteria, in addition to the knowledge of the 
> password.
>
> Limits based on the source host (e.g. localhost) and time of day (e.g. 
> only work hours) would be very useful.
>
> Is there a way to limit Directory Manager binds based on those 
> criteria in Fedora Directory Server?

No.  But please file a bug so we can track this issue.
> Note that in OpenLDAP this is possible using the following ACL:
>
> access to dn.base="cn=Manager,o=Example"
>  by peername.regex=127.0.0.1 auth
>  by users none
>  by anonymous none
>
> This ACL however requires creating a concrete LDAP entry that 
> corresponds to rootdn, setting a userPassword in taht entry, and 
> leaving the rootpw in OpenLDAP configuration undefined.
> This way the concrete userPassword is used when binding and is subject 
> to that ACL which only allows access from connections that origin from 
> 127.0.0.1.
>
> More details in this post on OpenLDAP mailing list:
> http://www.openldap.org/lists/openldap-software/200711/msg00342.html

[Aleksander Adamowski]

Rich Megginson wrote:
> Aleksander Adamowski wrote:
> > Limits based on the source host (e.g. localhost) and time of day 
> > (e.g. only work hours) would be very useful.
> >
> > Is there a way to limit Directory Manager binds based on those 
> > criteria in Fedora Directory Server?
>
> No.  But please file a bug so we can track this issue.

OK, filed bug 458187:
https://bugzilla.redhat.com/show_bug.cgi?id=458187