Sigurnosni nedostaci programskih paketa ipa i slapi-nis

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Red Hat Security Advisory

Synopsis: Moderate: ipa and slapi-nis security and bug fix update
Advisory ID: RHSA-2015:0728-01
Product: Red Hat Enterprise Linux
Advisory URL: https://rhn.redhat.com/errata/RHSA-2015-0728.html
Issue date: 2015-03-26
CVE Names: CVE-2015-0283 CVE-2015-1827
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1. Summary:

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.

2. Relevant releases/architectures:

Red Hat Enterprise Linux Client (v. 7) – x86_64
Red Hat Enterprise Linux Client Optional (v. 7) – x86_64
Red Hat Enterprise Linux ComputeNode (v. 7) – x86_64
Red Hat Enterprise Linux ComputeNode Optional (v. 7) – x86_64
Red Hat Enterprise Linux Server (v. 7) – ppc64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux Server Optional (v. 7) – ppc64, s390x
Red Hat Enterprise Linux Workstation (v. 7) – x86_64

3. 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.

4. 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

5. Bugs fixed (https://bugzilla.redhat.com/):

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

6. Package List:

Red Hat Enterprise Linux Client (v. 7):

Source:
ipa-4.1.0-18.el7_1.3.src.rpm

x86_64:
ipa-client-4.1.0-18.el7_1.3.x86_64.rpm
ipa-debuginfo-4.1.0-18.el7_1.3.x86_64.rpm
ipa-python-4.1.0-18.el7_1.3.x86_64.rpm

Red Hat Enterprise Linux Client Optional (v. 7):

Source:
slapi-nis-0.54-3.el7_1.src.rpm

x86_64:
ipa-admintools-4.1.0-18.el7_1.3.x86_64.rpm
ipa-debuginfo-4.1.0-18.el7_1.3.x86_64.rpm
ipa-server-4.1.0-18.el7_1.3.x86_64.rpm
ipa-server-trust-ad-4.1.0-18.el7_1.3.x86_64.rpm
slapi-nis-0.54-3.el7_1.x86_64.rpm
slapi-nis-debuginfo-0.54-3.el7_1.x86_64.rpm

Red Hat Enterprise Linux ComputeNode (v. 7):

Source:
ipa-4.1.0-18.el7_1.3.src.rpm

x86_64:
ipa-client-4.1.0-18.el7_1.3.x86_64.rpm
ipa-debuginfo-4.1.0-18.el7_1.3.x86_64.rpm
ipa-python-4.1.0-18.el7_1.3.x86_64.rpm

Red Hat Enterprise Linux ComputeNode Optional (v. 7):

Source:
slapi-nis-0.54-3.el7_1.src.rpm

Red Hat Enterprise Linux Server (v. 7):

Source:
ipa-4.1.0-18.el7_1.3.src.rpm
slapi-nis-0.54-3.el7_1.src.rpm

ppc64:
ipa-client-4.1.0-18.el7_1.3.ppc64.rpm
ipa-debuginfo-4.1.0-18.el7_1.3.ppc64.rpm
ipa-python-4.1.0-18.el7_1.3.ppc64.rpm

s390x:
ipa-client-4.1.0-18.el7_1.3.s390x.rpm
ipa-debuginfo-4.1.0-18.el7_1.3.s390x.rpm
ipa-python-4.1.0-18.el7_1.3.s390x.rpm

x86_64:
ipa-admintools-4.1.0-18.el7_1.3.x86_64.rpm
ipa-client-4.1.0-18.el7_1.3.x86_64.rpm
ipa-debuginfo-4.1.0-18.el7_1.3.x86_64.rpm
ipa-python-4.1.0-18.el7_1.3.x86_64.rpm
ipa-server-4.1.0-18.el7_1.3.x86_64.rpm
ipa-server-trust-ad-4.1.0-18.el7_1.3.x86_64.rpm
slapi-nis-0.54-3.el7_1.x86_64.rpm
slapi-nis-debuginfo-0.54-3.el7_1.x86_64.rpm

Red Hat Enterprise Linux Server (v. 7):

Source:
ipa-4.1.0-18.ael7b_1.3.src.rpm
slapi-nis-0.54-3.ael7b_1.src.rpm

ppc64le:
ipa-admintools-4.1.0-18.ael7b_1.3.ppc64le.rpm
ipa-client-4.1.0-18.ael7b_1.3.ppc64le.rpm
ipa-debuginfo-4.1.0-18.ael7b_1.3.ppc64le.rpm
ipa-python-4.1.0-18.ael7b_1.3.ppc64le.rpm
slapi-nis-0.54-3.ael7b_1.ppc64le.rpm
slapi-nis-debuginfo-0.54-3.ael7b_1.ppc64le.rpm

Red Hat Enterprise Linux Server Optional (v. 7):

ppc64:
ipa-admintools-4.1.0-18.el7_1.3.ppc64.rpm
ipa-debuginfo-4.1.0-18.el7_1.3.ppc64.rpm

s390x:
ipa-admintools-4.1.0-18.el7_1.3.s390x.rpm
ipa-debuginfo-4.1.0-18.el7_1.3.s390x.rpm

Red Hat Enterprise Linux Workstation (v. 7):

Source:
ipa-4.1.0-18.el7_1.3.src.rpm
slapi-nis-0.54-3.el7_1.src.rpm

These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/

7. References:

https://access.redhat.com/security/cve/CVE-2015-0283
https://access.redhat.com/security/cve/CVE-2015-1827
https://access.redhat.com/security/updates/classification/#moderate

8. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

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