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RE: [EXTERNAL] (ITS#8762) Unlocking an account doesn't remove pwdFailureTime
According to https://tools.ietf.org/html/draft-behera-ldap-password-policy-=
10 , chapter 5.2.13. pwdMaxFailure
This field is described as:
"This attribute specifies the number of consecutive failed bind attempts af=
ter which the password may not be used to authenticate."
In first case, when user is just created, for example, he can fail to login=
3 times and accounts get locked, which means the "password may not be used=
to authenticate", as stated above.
However, after admin unlocks the account, the user is still registered with=
3 failed bind attempts (the pwdFailureTime is not deleted) but now the use=
r can use the password to authenticate. This scenario contradicts the defin=
ition of pwdFailureTime.
Moreover, the pwdLockout attribute description says, on chapter 5.2.11 that=
" This attribute indicates, when its value is "TRUE", that the password ma=
y not be used to authenticate after a specified number of consecutive faile=
d bind attempts. The maximum number of consecutive failed bind attempts is=
specified in pwdMaxFailure."
In our password policy, pwdLockout is set to TRUE but after admin unlocks t=
est1 account, because pwdFailureTime is not cleared, it is considered that =
there are already 3 consecutive failed bind attempts, am I right?
However, in this case, the user is allowed to use the password for new auth=
entication which contradicts the definition of pwdLockout field.
Kind regards,
Mihai (+40213032732)=20
-----Original Message-----
From: Jon C Kidder [mailto:jckidder@aep.com]=20
Sent: Friday, October 27, 2017 2:46 PM
To: MUNTEANU Mihai-Adrian; openldap-its@OpenLDAP.org
Subject: RE: [EXTERNAL] (ITS#8762) Unlocking an account doesn't remove pwdF=
ailureTime
This is not a bug.
pwdFailureTime is only cleared after the first successful bind. If you're =
manually unlocking the user's account it can be assumed that you've gone th=
rough the exercise of ensuring the user is using the proper password. Perh=
aps by setting a new temporary password? If you haven't gone through that =
exercise 1 attempt vs multiple attempts is not going to matter. The user i=
s going to lock their account again anyway.
We've just recently deployed a password self-service tool and have accounte=
d for this current behavior in our help desk procedures. Our cyber securit=
y team loves this behavior.
JON C KIDDER | MIDDLEWARE ADMINISTRATOR LEAD JCKIDDER@AEP.COM | D:614.716.4=
970
1 RIVERSIDE PLAZA, COLUMBUS, OH 43215
-----Original Message-----
From: openldap-bugs [mailto:openldap-bugs-bounces@openldap.org] On Behalf O=
f mihai.munteanu@thalesgroup.com
Sent: Friday, October 27, 2017 3:48 AM
To: openldap-its@OpenLDAP.org
Subject: [EXTERNAL] (ITS#8762) Unlocking an account doesn't remove pwdFailu=
reTime
This is an EXTERNAL email. STOP. THINK before you CLICK links or OPEN attac=
hments. If suspicious please forward to incidents@aep.com for review.
**********************************************************************
Full_Name: Mihai Munteanu
Version: 2.4.44
OS: CentOS7 x64
URL: https://urldefense.proofpoint.com/v2/url?u=3Dftp-3A__ftp.openldap.org_=
incoming_&d=3DDwIBAg&c=3DgMbiD-Q9WoaRgoXZKCrSug&r=3DWacA_KdnzU1pvF8wEQ4v1A&=
m=3D3fgtnQphBlucWYzXakB6baAXEq2msUxFLlsMdi1aZQY&s=3DfE28OfhKUqMQkynWWNTkl9-=
sUN8henbPip3IgOunodI&e=3D
Submission from: (NULL) (86.12.190.162)
Scenario:=20
0. we have configured that after 3 login failed attempts, the account to be
locked.
1. user test1 fails to login 3 times -> account is locked
2. admin unlocks test1's account and notify test1 user
3. user test1 tries 1 time to login using a wrong password and gets his acc=
ount
locked again.
Expectation here: account should not be locked after first attempt of a wro=
ng
password, but after third attempt, as it was the case on step 1.=20
It turns out that it is locked again after first attempt due to the fact th=
at on
step 2, only pwdAccountLockedTime field is removed from LDAP, but not also
pwdFailureTime fields.
It seems pwdFailureTime is internally cleared only:
- when test1 successfully authenticate (having his account unlocked)
- admin changes test1's password
See below my details:
$>ldapsearch -x -b "cn=3Dtest1,ou=3Dusers,dc=3Dthales,dc=3Dcom" +
...
pwdChangedTime: 20171027043554Z
pwdFailureTime: 20171027052019.225837Z
pwdFailureTime: 20171027052021.776604Z
pwdFailureTime: 20171027052024.436413Z
pwdAccountLockedTime: 20171027052024Z
entryCSN: 20171027055105.381686Z#000000#000#000000
...
$>cat unlock.ldif:
dn: cn=3Dtest1,ou=3Dusers,dc=3Dthales,dc=3Dcom
changetype: modify
delete: pwdAccountLockedTime
-
delete: pwdFailureTime
$>ldapmodify -x -W -D "cn=3Dadmin,ou=3Dusers,dc=3Dthales,dc=3Dcom" -f unloc=
k.ldif
Enter LDAP Password:=20
modifying entry "cn=3Dtest1,ou=3Dusers,dc=3Dthales,dc=3Dcom"
ldap_modify: Constraint violation (19)
additional info: pwdFailureTime: no user modification allowed
$>cat unlock.ldif
dn: cn=3Dtest1,ou=3Dusers,dc=3Dthales,dc=3Dcom
changetype: modify
delete: pwdAccountLockedTime
$>ldapmodify -x -W -D "cn=3Djamessmith,ou=3Dusers,dc=3Dthales,dc=3Dcom" -f =
unlock.ldif
Enter LDAP Password:=20
modifying entry "cn=3Dtest1,ou=3Dusers,dc=3Dthales,dc=3Dcom"
$>ldapsearch -x -b "cn=3Dtest1,ou=3Dusers,dc=3Dthales,dc=3Dcom" +
...
pwdChangedTime: 20171027043554Z
pwdFailureTime: 20171027052019.225837Z
pwdFailureTime: 20171027052021.776604Z
pwdFailureTime: 20171027052024.436413Z
entryCSN: 20171027055105.381686Z#000000#000#000000
...
Result: pwdAccountLockedTime is removed but pwdFailureTime is not automatic=
ally
removed also.
Expected: since I'm not allowed to remove pwdFailureTime I would expect to =
be
automatically removed via removal of pwdAccountLockedTime.