/usr/share/pam-configs/sss is in libpam-sss 1.13.4-1ubuntu1.10.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22  | Name: SSS authentication
Default: yes
Priority: 128
Auth-Type: Primary
Auth:
	[success=end default=ignore]	pam_sss.so use_first_pass
Auth-Initial:
	[success=end default=ignore]	pam_sss.so forward_pass
Account-Type: Additional
Account:
	sufficient			pam_localuser.so
	[default=bad success=ok user_unknown=ignore]	pam_sss.so
Session-Type: Additional
Session-Interactive-Only: yes
Session:
	optional			pam_sss.so
Password-Type: Primary
Password:
	sufficient			pam_sss.so use_authtok
Password-Initial:
	sufficient			pam_sss.so
 |