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

[news 28]

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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

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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 vali[censored], 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 . More contact

details at https://access.redhat.com/security/team/contact/

 

Copyright 2015 Red Hat, Inc.

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