[SSSD-users] pam_sss returns PAM_SYSTEM_ERR when entering wrong Kerberos password
Joschi Brauchle
joschi.brauchle at tum.de
Fri Sep 7 15:44:59 UTC 2012
Hello,
I noticed a problem when using pam_sss (1.8.3) under OpenSUSE 12.2 + KDE
and filed a bugreport there:
https://bugzilla.novell.com/show_bug.cgi?id=779246
When a Kerberos user enters a wrong password, a KDM "Critical error"
message pops up (see link above for a screenshot).
In /var/log/messages, there is
------
Sep 7 11:34:03 test-os122 [sssd[krb5_child[1102]]]: Decrypt integrity check
failed
Sep 7 11:34:03 test-os122 [sssd[krb5_child[1102]]]: Decrypt integrity check
failed
Sep 7 11:34:03 test-os122 kdm: :0[1085]: pam_sss(xdm:auth): system info:
[Decrypt integrity check failed]
Sep 7 11:34:03 test-os122 kdm: :0[1085]: pam_sss(xdm:auth): authentication
failure; logname= uid=0 euid=0 tty=:0 ruser= rhost= user=testuser
Sep 7 11:34:03 test-os122 kdm: :0[1085]: pam_sss(xdm:auth): received
for user
testuser: 4 (System error)
------
As far as I know, "decrypt integrity fails" is the default Kerberos
error message for a wrong password. Hence, this is not a "System error",
but rather an authentication error.
When looking at the code of "krb5_child.c", it seems like the default
return code when checking the Kerberos TGT is "PAM_SYSTEM_ERR", which
also gets returned in the event of a simply wrong password.
I guess, pam_sss should instead return "PAM_AUTH_ERR", is that correct?
Has this been fixed in versions > 1.8.3?
Best regards,
Joschi Brauchle
-------------- next part --------------
A non-text attachment was scrubbed...
Name: smime.p7s
Type: application/pkcs7-signature
Size: 4607 bytes
Desc: S/MIME Cryptographic Signature
URL: <https://lists.fedorahosted.org/pipermail/sssd-users/attachments/20120907/3e068e24/attachment.p7s>
More information about the sssd-users
mailing list