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[RHSA-2015:2455-01] Low: unbound security and bug fix update



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=====================================================================
                   Red Hat Security Advisory

Synopsis:          Low: unbound security and bug fix update
Advisory ID:       RHSA-2015:2455-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2015-2455.html
Issue date:        2015-11-19
CVE Names:         CVE-2014-8602 
=====================================================================

1. Summary:

Updated unbound packages that fix one security issue and several bugs are
now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having Low security
impact. A Common Vulnerability Scoring System (CVSS) base score, which
gives a detailed severity rating, is available from the CVE link 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) - aarch64, ppc64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux Server Optional (v. 7) - aarch64, ppc64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux Workstation (v. 7) - x86_64
Red Hat Enterprise Linux Workstation Optional (v. 7) - x86_64

3. Description:

The unbound packages provide a validating, recursive, and caching DNS or
DNSSEC resolver.

A denial of service flaw was found in unbound that an attacker could use to
trick the unbound resolver into following an endless loop of delegations,
consuming an excessive amount of resources. (CVE-2014-8602)

This update also fixes the following bugs:

* Prior to this update, there was a mistake in the time configuration in
the cron job invoking unbound-anchor to update the root zone key.
Consequently, unbound-anchor was invoked once a month instead of every day,
thus not complying with RFC 5011. The cron job has been replaced with a
systemd timer unit that is invoked on a daily basis. Now, the root zone key
validity is checked daily at a random time within a 24-hour window, and
compliance with RFC 5011 is ensured. (BZ#1180267)

* Previously, the unbound packages were installing their configuration file
for the systemd-tmpfiles utility into the /etc/tmpfiles.d/ directory. As a 
consequence, changes to unbound made by the administrator in 
/etc/tmpfiles.d/ could be overwritten on package reinstallation or update. 
To fix this bug, unbound has been amended to install the configuration file
into the /usr/lib/tmpfiles.d/ directory. As a result, the system 
administrator's configuration in /etc/tmpfiles.d/ is preserved, including 
any changes, on package reinstallation or update. (BZ#1180995)

* The unbound server default configuration included validation of DNS
records using the DNSSEC Look-aside Validation (DLV) registry. The Internet
Systems Consortium (ISC) plans to deprecate the DLV registry service as no
longer needed, and unbound could execute unnecessary steps. Therefore, the 
use of the DLV registry has been removed from the unbound server default 
configuration. Now, unbound does not try to perform DNS records validation 
using the DLV registry. (BZ#1223339)

All unbound users are advised to upgrade to these updated packages, which
contain backported patches to 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/):

1172065 - CVE-2014-8602 unbound: specially crafted request can lead to denial of service
1180267 - root key management does not comply with RFC5011
1180995 - unbound is installing files under /etc/tmpfiles.d/

6. Package List:

Red Hat Enterprise Linux Client (v. 7):

Source:
unbound-1.4.20-26.el7.src.rpm

x86_64:
unbound-1.4.20-26.el7.x86_64.rpm
unbound-debuginfo-1.4.20-26.el7.i686.rpm
unbound-debuginfo-1.4.20-26.el7.x86_64.rpm
unbound-libs-1.4.20-26.el7.i686.rpm
unbound-libs-1.4.20-26.el7.x86_64.rpm

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

x86_64:
unbound-debuginfo-1.4.20-26.el7.i686.rpm
unbound-debuginfo-1.4.20-26.el7.x86_64.rpm
unbound-devel-1.4.20-26.el7.i686.rpm
unbound-devel-1.4.20-26.el7.x86_64.rpm
unbound-python-1.4.20-26.el7.x86_64.rpm

Red Hat Enterprise Linux ComputeNode (v. 7):

Source:
unbound-1.4.20-26.el7.src.rpm

x86_64:
unbound-debuginfo-1.4.20-26.el7.i686.rpm
unbound-debuginfo-1.4.20-26.el7.x86_64.rpm
unbound-libs-1.4.20-26.el7.i686.rpm
unbound-libs-1.4.20-26.el7.x86_64.rpm

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

x86_64:
unbound-1.4.20-26.el7.x86_64.rpm
unbound-debuginfo-1.4.20-26.el7.i686.rpm
unbound-debuginfo-1.4.20-26.el7.x86_64.rpm
unbound-devel-1.4.20-26.el7.i686.rpm
unbound-devel-1.4.20-26.el7.x86_64.rpm
unbound-python-1.4.20-26.el7.x86_64.rpm

Red Hat Enterprise Linux Server (v. 7):

Source:
unbound-1.4.20-26.el7.src.rpm

aarch64:
unbound-1.4.20-26.el7.aarch64.rpm
unbound-debuginfo-1.4.20-26.el7.aarch64.rpm
unbound-libs-1.4.20-26.el7.aarch64.rpm

ppc64:
unbound-1.4.20-26.el7.ppc64.rpm
unbound-debuginfo-1.4.20-26.el7.ppc.rpm
unbound-debuginfo-1.4.20-26.el7.ppc64.rpm
unbound-libs-1.4.20-26.el7.ppc.rpm
unbound-libs-1.4.20-26.el7.ppc64.rpm

ppc64le:
unbound-1.4.20-26.el7.ppc64le.rpm
unbound-debuginfo-1.4.20-26.el7.ppc64le.rpm
unbound-libs-1.4.20-26.el7.ppc64le.rpm

s390x:
unbound-1.4.20-26.el7.s390x.rpm
unbound-debuginfo-1.4.20-26.el7.s390.rpm
unbound-debuginfo-1.4.20-26.el7.s390x.rpm
unbound-libs-1.4.20-26.el7.s390.rpm
unbound-libs-1.4.20-26.el7.s390x.rpm

x86_64:
unbound-1.4.20-26.el7.x86_64.rpm
unbound-debuginfo-1.4.20-26.el7.i686.rpm
unbound-debuginfo-1.4.20-26.el7.x86_64.rpm
unbound-libs-1.4.20-26.el7.i686.rpm
unbound-libs-1.4.20-26.el7.x86_64.rpm

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

aarch64:
unbound-debuginfo-1.4.20-26.el7.aarch64.rpm
unbound-devel-1.4.20-26.el7.aarch64.rpm
unbound-python-1.4.20-26.el7.aarch64.rpm

ppc64:
unbound-debuginfo-1.4.20-26.el7.ppc.rpm
unbound-debuginfo-1.4.20-26.el7.ppc64.rpm
unbound-devel-1.4.20-26.el7.ppc.rpm
unbound-devel-1.4.20-26.el7.ppc64.rpm
unbound-python-1.4.20-26.el7.ppc64.rpm

ppc64le:
unbound-debuginfo-1.4.20-26.el7.ppc64le.rpm
unbound-devel-1.4.20-26.el7.ppc64le.rpm
unbound-python-1.4.20-26.el7.ppc64le.rpm

s390x:
unbound-debuginfo-1.4.20-26.el7.s390.rpm
unbound-debuginfo-1.4.20-26.el7.s390x.rpm
unbound-devel-1.4.20-26.el7.s390.rpm
unbound-devel-1.4.20-26.el7.s390x.rpm
unbound-python-1.4.20-26.el7.s390x.rpm

x86_64:
unbound-debuginfo-1.4.20-26.el7.i686.rpm
unbound-debuginfo-1.4.20-26.el7.x86_64.rpm
unbound-devel-1.4.20-26.el7.i686.rpm
unbound-devel-1.4.20-26.el7.x86_64.rpm
unbound-python-1.4.20-26.el7.x86_64.rpm

Red Hat Enterprise Linux Workstation (v. 7):

Source:
unbound-1.4.20-26.el7.src.rpm

x86_64:
unbound-1.4.20-26.el7.x86_64.rpm
unbound-debuginfo-1.4.20-26.el7.i686.rpm
unbound-debuginfo-1.4.20-26.el7.x86_64.rpm
unbound-libs-1.4.20-26.el7.i686.rpm
unbound-libs-1.4.20-26.el7.x86_64.rpm

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

x86_64:
unbound-debuginfo-1.4.20-26.el7.i686.rpm
unbound-debuginfo-1.4.20-26.el7.x86_64.rpm
unbound-devel-1.4.20-26.el7.i686.rpm
unbound-devel-1.4.20-26.el7.x86_64.rpm
unbound-python-1.4.20-26.el7.x86_64.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-2014-8602
https://access.redhat.com/security/updates/classification/#low

8. Contact:

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

Copyright 2015 Red Hat, Inc.
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