Red Hat Identity Management is a centralized authentication, identity management, and authorization solution for both traditional and cloud-based enterprise environments. It integrates components of the Red Hat Directory Server, MIT Kerberos, Red Hat Certificate System, NTP, and DNS. It provides web browser and command-line interfaces. Its administration tools allow an administrator to quickly install, set up, and administer a group of domain controllers to meet the authentication and identity management requirements of large-scale Linux and UNIX deployments. The ipa component provides centrally managed Identity, Policy, and Audit. The slapi-nis component provides NIS Server and Schema Compatibility plug-ins for Directory Server. It was discovered that the IPA extdom Directory Server plug-in did not correctly perform memory reallocation when handling user account information. A request for a list of groups for a user that belongs to a large number of groups would cause a Directory Server to crash. It was discovered that the slapi-nis Directory Server plug-in did not correctly perform memory reallocation when handling user account information. A request for information about a group with many members, or a request for a user that belongs to a large number of groups, would cause a Directory Server to enter an infinite loop and consume an excessive amount of CPU time. These issues were discovered by Sumit Bose of Red Hat. This update fixes the following bugs: * Previously, users of IdM were not properly granted the default permission to read the "facsimiletelephonenumber" user attribute. This update adds "facsimiletelephonenumber" to the Access Control Instruction for user data, which makes the attribute readable to authenticated users as expected. * Prior to this update, when a DNS zone was saved in an LDAP database without a dot character at the end, internal DNS commands and operations, such as dnsrecord-* or dnszone-*, failed. With this update, DNS commands always supply the DNS zone with a dot character at the end, which prevents the described problem. * After a full-server IdM restore operation, the restored server in some cases contained invalid data. In addition, if the restored server was used to reinitialize a replica, the replica then contained invalid data as well. To fix this problem, the IdM API is now created correctly during the restore operation, and *.ldif files are not skipped during the removal of RUV data. As a result, the restored server and its replica no longer contain invalid data. * Previously, a deadlock in some cases occurred during an IdM upgrade, which could cause the IdM server to become unresponsive. With this update, the Schema Compatibility plug-in has been adjusted not to parse the subtree that contains the configuration of the DNA plug-in, which prevents this deadlock from triggering. * When using the extdom plug-in of IdM to handle large groups, user lookups and group lookups previously failed due to insufficient buffer size. With this update, the getgrgid_r call gradually increases the buffer length if needed, and the described failure of extdom thus no longer occurs. Users of ipa and slapi-nis are advised to upgrade to these updated packages, which correct these issues.