RHSA-2015:0728 - Security Advisory

Topic

Updated ipa and slapi-nis packages that fix two security issues and several
bugs are now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having Moderate security
impact. Common Vulnerability Scoring System (CVSS) base scores, which give
detailed severity ratings, are available for each vulnerability from the
CVE links in the References section.

Description

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.
(CVE-2015-1827)

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. (CVE-2015-0283)

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 (ACI) for user
data, which makes the attribute readable to authenticated users as
expected. (BZ#1198430)

• 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. (BZ#1198431)

• 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. (BZ#1199060)

• 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. (BZ#1199128)

• 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. (BZ#1203204)

Users of ipa and slapi-nis are advised to upgrade to these updated
packages, which correct these issues.

Solution

Before applying this update, make sure all previously released errata
relevant to your system have been applied.

For details on how to apply this update, refer to:

https://access.redhat.com/articles/11258

Affected Products

• Red Hat Enterprise Linux Server 7 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 7.7 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 7.6 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 7.5 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 7.4 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 7.3 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 7.2 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 7.1 x86_64
• Red Hat Enterprise Linux Server - AUS 7.7 x86_64
• Red Hat Enterprise Linux Server - AUS 7.4 x86_64
• Red Hat Enterprise Linux Server - AUS 7.3 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 7 x86_64
• Red Hat Enterprise Linux Workstation 7 x86_64
• Red Hat Enterprise Linux Desktop 7 x86_64
• Red Hat Enterprise Linux for IBM z Systems 7 s390x
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 7.7 s390x
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 7.6 s390x
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 7.5 s390x
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 7.4 s390x
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 7.3 s390x
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 7.2 s390x
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 7.1 s390x
• Red Hat Enterprise Linux for Power, big endian 7 ppc64
• Red Hat Enterprise Linux for Power, big endian - Extended Update Support 7.7 ppc64
• Red Hat Enterprise Linux for Power, big endian - Extended Update Support 7.6 ppc64
• Red Hat Enterprise Linux for Power, big endian - Extended Update Support 7.5 ppc64
• Red Hat Enterprise Linux for Power, big endian - Extended Update Support 7.4 ppc64
• Red Hat Enterprise Linux for Power, big endian - Extended Update Support 7.3 ppc64
• Red Hat Enterprise Linux for Power, big endian - Extended Update Support 7.2 ppc64
• Red Hat Enterprise Linux for Power, big endian - Extended Update Support 7.1 ppc64
• Red Hat Enterprise Linux for Scientific Computing 7 x86_64
• Red Hat Enterprise Linux Server from RHUI 7 x86_64
• Red Hat Enterprise Linux Server - AUS 7.6 x86_64
• Red Hat Enterprise Linux for Power, little endian 7 ppc64le
• Red Hat Enterprise Linux for Power, little endian - Extended Update Support 7.7 ppc64le
• Red Hat Enterprise Linux for Power, little endian - Extended Update Support 7.6 ppc64le
• Red Hat Enterprise Linux for Power, little endian - Extended Update Support 7.5 ppc64le
• Red Hat Enterprise Linux for Power, little endian - Extended Update Support 7.4 ppc64le
• Red Hat Enterprise Linux for Power, little endian - Extended Update Support 7.3 ppc64le
• Red Hat Enterprise Linux for Power, little endian - Extended Update Support 7.2 ppc64le
• Red Hat Enterprise Linux for Power, little endian - Extended Update Support 7.1 ppc64le
• Red Hat Enterprise Linux Server - TUS 7.7 x86_64
• Red Hat Enterprise Linux Server - TUS 7.6 x86_64
• Red Hat Enterprise Linux Server - TUS 7.3 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems) 7 s390x
• Red Hat Enterprise Linux EUS Compute Node 7.7 x86_64
• Red Hat Enterprise Linux EUS Compute Node 7.6 x86_64
• Red Hat Enterprise Linux EUS Compute Node 7.5 x86_64
• Red Hat Enterprise Linux EUS Compute Node 7.4 x86_64
• Red Hat Enterprise Linux EUS Compute Node 7.3 x86_64
• Red Hat Enterprise Linux EUS Compute Node 7.2 x86_64
• Red Hat Enterprise Linux EUS Compute Node 7.1 x86_64
• Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 7.7 ppc64le
• Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 7.6 ppc64le
• Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 7.4 ppc64le
• Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 7.3 ppc64le
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 7.7 x86_64
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 7.6 x86_64
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 7.4 x86_64
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 7.3 x86_64
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 7.2 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support for IBM Power, big endian 7 ppc64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support for IBM Power, little endian 7 ppc64le

Fixes

• BZ - 1195729 - CVE-2015-0283 slapi-nis: infinite loop in getgrnam_r() and getgrgid_r()
• BZ - 1198430 - Fax number not displayed for user-show when kinit'ed as normal user.
• BZ - 1198431 - "an internal error has occurred" during ipa host-del --updatedns
• BZ - 1199060 - Replication agreement with replica not disabled when ipa-restore done without IPA installed
• BZ - 1199128 - Limit deadlocks between DS plugin DNA and slapi-nis
• BZ - 1205200 - CVE-2015-1827 ipa: memory corruption when using get_user_grouplist()

CVEs

• CVE-2015-1827
• CVE-2015-0283

References

• https://access.redhat.com/security/updates/classification/#moderate