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AUSCERT External Security Bulletin Redistribution
ESB-2020.3460
unbound security update
7 October 2020
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: unbound
Publisher: Red Hat
Operating System: Red Hat Enterprise Linux Server 7
Red Hat Enterprise Linux WS/Desktop 7
Impact/Access: Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2020-12663 CVE-2020-12662
Reference: ESB-2020.2336
ESB-2020.2163
Original Bulletin:
https://access.redhat.com/errata/RHSA-2020:4181
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Red Hat Security Advisory
Synopsis: Important: unbound security update
Advisory ID: RHSA-2020:4181-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2020:4181
Issue date: 2020-10-06
CVE Names: CVE-2020-12662 CVE-2020-12663
=====================================================================
1. Summary:
An update for unbound is now available for Red Hat Enterprise Linux 7.7
Extended Update Support.
Red Hat Product Security has rated this update as having a security impact
of Important. A Common Vulnerability Scoring System (CVSS) base score,
which gives a detailed severity rating, is available for each vulnerability
from the CVE link(s) in the References section.
2. Relevant releases/architectures:
Red Hat Enterprise Linux ComputeNode EUS (v. 7.7) - x86_64
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.7) - x86_64
Red Hat Enterprise Linux Server EUS (v. 7.7) - ppc64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux Server Optional EUS (v. 7.7) - ppc64, ppc64le, s390x, x86_64
3. Description:
The unbound packages provide a validating, recursive, and caching DNS or
DNSSEC resolver.
Security Fix(es):
* unbound: amplification of an incoming query into a large number of
queries directed to a target (CVE-2020-12662)
* unbound: infinite loop via malformed DNS answers received from upstream
servers (CVE-2020-12663)
For more details about the security issue(s), including the impact, a CVSS
score, acknowledgments, and other related information, refer to the CVE
page(s) listed in the References section.
4. Solution:
For details on how to apply this update, which includes the changes
described in this advisory, refer to:
https://access.redhat.com/articles/11258
5. Bugs fixed (https://bugzilla.redhat.com/):
1837597 - CVE-2020-12662 unbound: amplification of an incoming query into a large number of queries directed to a target
1837604 - CVE-2020-12663 unbound: infinite loop via malformed DNS answers received from upstream servers
6. Package List:
Red Hat Enterprise Linux ComputeNode EUS (v. 7.7):
Source:
unbound-1.6.6-2.el7_7.src.rpm
x86_64:
unbound-debuginfo-1.6.6-2.el7_7.i686.rpm
unbound-debuginfo-1.6.6-2.el7_7.x86_64.rpm
unbound-libs-1.6.6-2.el7_7.i686.rpm
unbound-libs-1.6.6-2.el7_7.x86_64.rpm
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.7):
x86_64:
unbound-1.6.6-2.el7_7.x86_64.rpm
unbound-debuginfo-1.6.6-2.el7_7.i686.rpm
unbound-debuginfo-1.6.6-2.el7_7.x86_64.rpm
unbound-devel-1.6.6-2.el7_7.i686.rpm
unbound-devel-1.6.6-2.el7_7.x86_64.rpm
unbound-python-1.6.6-2.el7_7.x86_64.rpm
Red Hat Enterprise Linux Server EUS (v. 7.7):
Source:
unbound-1.6.6-2.el7_7.src.rpm
ppc64:
unbound-1.6.6-2.el7_7.ppc64.rpm
unbound-debuginfo-1.6.6-2.el7_7.ppc.rpm
unbound-debuginfo-1.6.6-2.el7_7.ppc64.rpm
unbound-libs-1.6.6-2.el7_7.ppc.rpm
unbound-libs-1.6.6-2.el7_7.ppc64.rpm
ppc64le:
unbound-1.6.6-2.el7_7.ppc64le.rpm
unbound-debuginfo-1.6.6-2.el7_7.ppc64le.rpm
unbound-libs-1.6.6-2.el7_7.ppc64le.rpm
s390x:
unbound-1.6.6-2.el7_7.s390x.rpm
unbound-debuginfo-1.6.6-2.el7_7.s390.rpm
unbound-debuginfo-1.6.6-2.el7_7.s390x.rpm
unbound-libs-1.6.6-2.el7_7.s390.rpm
unbound-libs-1.6.6-2.el7_7.s390x.rpm
x86_64:
unbound-1.6.6-2.el7_7.x86_64.rpm
unbound-debuginfo-1.6.6-2.el7_7.i686.rpm
unbound-debuginfo-1.6.6-2.el7_7.x86_64.rpm
unbound-libs-1.6.6-2.el7_7.i686.rpm
unbound-libs-1.6.6-2.el7_7.x86_64.rpm
Red Hat Enterprise Linux Server Optional EUS (v. 7.7):
ppc64:
unbound-debuginfo-1.6.6-2.el7_7.ppc.rpm
unbound-debuginfo-1.6.6-2.el7_7.ppc64.rpm
unbound-devel-1.6.6-2.el7_7.ppc.rpm
unbound-devel-1.6.6-2.el7_7.ppc64.rpm
unbound-python-1.6.6-2.el7_7.ppc64.rpm
ppc64le:
unbound-debuginfo-1.6.6-2.el7_7.ppc64le.rpm
unbound-devel-1.6.6-2.el7_7.ppc64le.rpm
unbound-python-1.6.6-2.el7_7.ppc64le.rpm
s390x:
unbound-debuginfo-1.6.6-2.el7_7.s390.rpm
unbound-debuginfo-1.6.6-2.el7_7.s390x.rpm
unbound-devel-1.6.6-2.el7_7.s390.rpm
unbound-devel-1.6.6-2.el7_7.s390x.rpm
unbound-python-1.6.6-2.el7_7.s390x.rpm
x86_64:
unbound-debuginfo-1.6.6-2.el7_7.i686.rpm
unbound-debuginfo-1.6.6-2.el7_7.x86_64.rpm
unbound-devel-1.6.6-2.el7_7.i686.rpm
unbound-devel-1.6.6-2.el7_7.x86_64.rpm
unbound-python-1.6.6-2.el7_7.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-2020-12662
https://access.redhat.com/security/cve/CVE-2020-12663
https://access.redhat.com/security/updates/classification/#important
8. Contact:
The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2020 Red Hat, Inc.
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