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Password authentication not working properly on Exadata Compute/Database Nodes (Doc ID 2886834.1)

Last updated on JUNE 27, 2023

Applies to:

Linux OS - Version Oracle Linux 7.0 with Unbreakable Enterprise Kernel [3.8.13] to Oracle Linux 7.9 with Unbreakable Enterprise Kernel [5.4.17] [Release OL7 to OL7U9]
Generic Linux


Issue is that while logging to Exadata compute/database server via putty, it is allowing logins to the server with any keystroke regardless of right and wrong password
Errorr "access denied" asserted only when trying to enter without pressing any key.

Environments Details:

Oracle Linux Server release 7.9

Exadata Image Version

Kernel Version 4.14.35-2047.511.5.5.1.el7uek.x86_64

Uptrack kernel version: 4.14.35-2047.512.6.el7uek.x86_64


PAM Modules ( and which authenticate/validate user access have been disabled.

Issue was noticed post Exadate image upgrade. However, looking at backup file created by upgrade process, it appears that the problem was present even before.

Even in backup file specified modules invocation was commented-out.


$ ls -la password-auth.backupByExadata
-rwxrwxrwx 1 oracle dba 1282 Jul 22 05:25 password-auth.backupByExadata

$ cat password-auth.backupByExadata
# This file is auto-generated.
# User changes will be destroyed the next time authconfig is run.
auth required
auth required try_first_pass
#auth requisite uid >= 500 quiet <<---------- commented-out in backup file also
auth sufficient use_first_pass
#auth required <<---------- commented-out in backup file also




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