https://bz.apache.org/bugzilla/show_bug.cgi?id=65168
Bug ID: 65168
Summary: Authentication with authnz_ldap fails if attribute
displayName is different than samAccountName or CN
Product: Apache httpd-2
Version: 2.4.46
Hardware: PC
Status: NEW
Severity: normal
Priority: P2
Component: mod_authnz_ldap
Assignee: bugs@httpd.apache.org
Reporter: a...@dbyt.es
Target Milestone: ---
Created attachment 37755
--> https://bz.apache.org/bugzilla/attachment.cgi?id=37755&action=edit
error.log with authnz_ldap
Hi,
I've configured authentication using authnz_ldap module and noticed that some
users in my AD can login while others can't.
After some investigating I've managed to reproduce the issue as follows
* Install AD on Windows Server (confirmed with 2008R2, 2016 & 2019)
* Configure Apache to use LDAP, for the test I used the following in .htaccess:
AuthName admin
AuthType basic
AuthBasicProvider ldap
AuthLDAPURL "ldap://127.0.0.1/DC=corp,DC=ad?sAMAccountName?sub?(objectClass=*)"
LDAPReferrals off
AuthLDAPInitialBindAsUser on
Require valid-user
# note you can use "cn" attribute as well in the URL, same result
* Create a new user with displayName different then his samAccountName & CN,
e.g.
CN=samAccountName=dummy
displayName=dummy1
* try to login, it will fail with Invalid Credential error
* change dummy's displayName to dummy - do not change the password
* try to login, now it will allow you to login
note that using AuthLDAPBindDN & AuthLDAPBindPassword seems to work regardless
of displayName's value, but this configuration is not secure
Attached the log details related to the issue.
I used ApacheLounge's latest Windows build v2.4.46
BTW, I tested the same user/password with PHP's LDAP functionality (see
https://php.net/ldap) during my Apache tests and PHP was able to login using
the credentials while Apache HTTP failed with the error.
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