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Verified the bug on SSSD Version : sssd-1.13.3-52.el6
Steps followed during verification:
1. Add sudo rules in AD, allowing users to run commands. Also, assign the sudoUser attribute values in Upper case and lower case. For example:
dn: CN=rule2,OU=sudoers,DC=black,DC=com
objectClass: top
objectClass: sudoRole
cn: rule2
distinguishedName: CN=rule2,OU=sudoers,DC=black,DC=com
instanceType: 4
whenCreated: 20161114142141.0Z
whenChanged: 20161114142141.0Z
uSNCreated: 65679
uSNChanged: 65679
name: rule2
objectGUID:: K32CWpLY0k2xNvzxsKmxrQ==
objectCategory: CN=sudoRole,CN=Schema,CN=Configuration,DC=black,DC=com
dSCorePropagationData: 16010101000000.0Z
sudoCommand: /usr/bin/more
sudoUser: STUDENT3
sudoHost: ALL
.
.
sudoUser: student2, sudoUser: student2 etc.
2. Setup sssd client and execute sudo cmds as users in exact case names, lower case names and upper case names.
# sudo -l -U student2
User student2 may run the following commands on this host:
(root) /usr/bin/less
(root) /usr/bin/more
# sudo -l -U STUDENT7
User student7 may run the following commands on this host:
(root) ALL
# sudo -l -U student7
User student7 may run the following commands on this host:
(root) ALL
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
https://rhn.redhat.com/errata/RHBA-2017-0632.html