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Category:   Application (Generic)  >   BIND Vendors:   ISC (Internet Software Consortium)
(Red Hat Issues Fix) BIND TSIG Authentication Bugs Let Remote Users Bypass Authentication to Transfer or Modify Zone Conetnt
SecurityTracker Alert ID:  1038828
SecurityTracker URL:  http://securitytracker.com/id/1038828
CVE Reference:   CVE-2017-3142, CVE-2017-3143   (Links to External Site)
Date:  Jul 6 2017
Impact:   Disclosure of user information, Modification of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 9.4.0 - 9.8.8, 9.9.0 - 9.9.10-P1, 9.10.0 - 9.10.5-P1, 9.11.0 - 9.11.1-P1, 9.9.3-S1 - 9.9.10-S2, 9.10.5-S1 - 9.10.5-S2
Description:   Two vulnerabilities were reported in BIND. A remote user can bypass TSIG authentication to transfer a zone or modify zone contents.

A remote user that can send and receive messages to an authoritative DNS server and with knowledge of a valid TSIG key name can send a specially crafted request packet to bypass TSIG authentication on AXFR requests and transfer the target zone [CVE-2017-3142].

A remote user that can send and receive messages to an authoritative DNS server and with knowledge of a valid TSIG key name can send specially crafted data to bypass TSIG authentication and cause the target server to accept an arbitrary dynamic update to the zone content [CVE-2017-3143].

Systems that rely solely on TSIG keys for access control are affected.

Clement Berthaux from Synacktiv reported these vulnerabilities.

Impact:   A remote user can bypass authentication to transfer a zone or modify zone contents.
Solution:   Red Hat has issued a fix.

The Red Hat advisory is available at:

https://access.redhat.com/errata/RHSA-2017:1679

Vendor URL:  access.redhat.com/errata/RHSA-2017:1679 (Links to External Site)
Cause:   Authentication error
Underlying OS:  Linux (Red Hat Enterprise)
Underlying OS Comments:  6

Message History:   This archive entry is a follow-up to the message listed below.
Jun 29 2017 BIND TSIG Authentication Bugs Let Remote Users Bypass Authentication to Transfer or Modify Zone Conetnt



 Source Message Contents

Subject:  [RHSA-2017:1679-01] Important: bind security and bug fix update

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

Synopsis:          Important: bind security and bug fix update
Advisory ID:       RHSA-2017:1679-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2017:1679
Issue date:        2017-07-05
CVE Names:         CVE-2017-3142 CVE-2017-3143 
=====================================================================

1. Summary:

An update for bind is now available for Red Hat Enterprise Linux 6.

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 Desktop (v. 6) - i386, x86_64
Red Hat Enterprise Linux Desktop Optional (v. 6) - i386, x86_64
Red Hat Enterprise Linux HPC Node (v. 6) - x86_64
Red Hat Enterprise Linux HPC Node Optional (v. 6) - x86_64
Red Hat Enterprise Linux Server (v. 6) - i386, ppc64, s390x, x86_64
Red Hat Enterprise Linux Server Optional (v. 6) - i386, ppc64, s390x, x86_64
Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64
Red Hat Enterprise Linux Workstation Optional (v. 6) - i386, x86_64

3. Description:

The Berkeley Internet Name Domain (BIND) is an implementation of the Domain
Name System (DNS) protocols. BIND includes a DNS server (named); a resolver
library (routines for applications to use when interfacing with DNS); and
tools for verifying that the DNS server is operating correctly.

Security Fix(es):

* A flaw was found in the way BIND handled TSIG authentication for dynamic
updates. A remote attacker able to communicate with an authoritative BIND
server could use this flaw to manipulate the contents of a zone, by forging
a valid TSIG or SIG(0) signature for a dynamic update request.
(CVE-2017-3143)

* A flaw was found in the way BIND handled TSIG authentication of AXFR
requests. A remote attacker, able to communicate with an authoritative BIND
server, could use this flaw to view the entire contents of a zone by
sending a specially constructed request packet. (CVE-2017-3142)

Red Hat would like to thank Internet Systems Consortium for reporting these
issues. Upstream acknowledges Clement Berthaux (Synacktiv) as the original
reporter of these issues.

Bug Fix(es):

* ICANN is planning to perform a Root Zone DNSSEC Key Signing Key (KSK)
rollover during October 2017. Maintaining an up-to-date KSK, by adding the
new root zone KSK, is essential for ensuring that validating DNS resolvers
continue to function following the rollover. (BZ#1458234)

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

After installing the update, the BIND daemon (named) will be restarted
automatically.

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

1466189 - CVE-2017-3142 bind: An error in TSIG authentication can permit unauthorized zone transfers
1466193 - CVE-2017-3143 bind: An error in TSIG authentication can permit unauthorized dynamic updates

6. Package List:

Red Hat Enterprise Linux Desktop (v. 6):

Source:
bind-9.8.2-0.62.rc1.el6_9.4.src.rpm

i386:
bind-debuginfo-9.8.2-0.62.rc1.el6_9.4.i686.rpm
bind-libs-9.8.2-0.62.rc1.el6_9.4.i686.rpm
bind-utils-9.8.2-0.62.rc1.el6_9.4.i686.rpm

x86_64:
bind-debuginfo-9.8.2-0.62.rc1.el6_9.4.i686.rpm
bind-debuginfo-9.8.2-0.62.rc1.el6_9.4.x86_64.rpm
bind-libs-9.8.2-0.62.rc1.el6_9.4.i686.rpm
bind-libs-9.8.2-0.62.rc1.el6_9.4.x86_64.rpm
bind-utils-9.8.2-0.62.rc1.el6_9.4.x86_64.rpm

Red Hat Enterprise Linux Desktop Optional (v. 6):

i386:
bind-9.8.2-0.62.rc1.el6_9.4.i686.rpm
bind-chroot-9.8.2-0.62.rc1.el6_9.4.i686.rpm
bind-debuginfo-9.8.2-0.62.rc1.el6_9.4.i686.rpm
bind-devel-9.8.2-0.62.rc1.el6_9.4.i686.rpm
bind-sdb-9.8.2-0.62.rc1.el6_9.4.i686.rpm

x86_64:
bind-9.8.2-0.62.rc1.el6_9.4.x86_64.rpm
bind-chroot-9.8.2-0.62.rc1.el6_9.4.x86_64.rpm
bind-debuginfo-9.8.2-0.62.rc1.el6_9.4.i686.rpm
bind-debuginfo-9.8.2-0.62.rc1.el6_9.4.x86_64.rpm
bind-devel-9.8.2-0.62.rc1.el6_9.4.i686.rpm
bind-devel-9.8.2-0.62.rc1.el6_9.4.x86_64.rpm
bind-sdb-9.8.2-0.62.rc1.el6_9.4.x86_64.rpm

Red Hat Enterprise Linux HPC Node (v. 6):

Source:
bind-9.8.2-0.62.rc1.el6_9.4.src.rpm

x86_64:
bind-debuginfo-9.8.2-0.62.rc1.el6_9.4.i686.rpm
bind-debuginfo-9.8.2-0.62.rc1.el6_9.4.x86_64.rpm
bind-libs-9.8.2-0.62.rc1.el6_9.4.i686.rpm
bind-libs-9.8.2-0.62.rc1.el6_9.4.x86_64.rpm
bind-utils-9.8.2-0.62.rc1.el6_9.4.x86_64.rpm

Red Hat Enterprise Linux HPC Node Optional (v. 6):

x86_64:
bind-9.8.2-0.62.rc1.el6_9.4.x86_64.rpm
bind-chroot-9.8.2-0.62.rc1.el6_9.4.x86_64.rpm
bind-debuginfo-9.8.2-0.62.rc1.el6_9.4.i686.rpm
bind-debuginfo-9.8.2-0.62.rc1.el6_9.4.x86_64.rpm
bind-devel-9.8.2-0.62.rc1.el6_9.4.i686.rpm
bind-devel-9.8.2-0.62.rc1.el6_9.4.x86_64.rpm
bind-sdb-9.8.2-0.62.rc1.el6_9.4.x86_64.rpm

Red Hat Enterprise Linux Server (v. 6):

Source:
bind-9.8.2-0.62.rc1.el6_9.4.src.rpm

i386:
bind-9.8.2-0.62.rc1.el6_9.4.i686.rpm
bind-chroot-9.8.2-0.62.rc1.el6_9.4.i686.rpm
bind-debuginfo-9.8.2-0.62.rc1.el6_9.4.i686.rpm
bind-libs-9.8.2-0.62.rc1.el6_9.4.i686.rpm
bind-utils-9.8.2-0.62.rc1.el6_9.4.i686.rpm

ppc64:
bind-9.8.2-0.62.rc1.el6_9.4.ppc64.rpm
bind-chroot-9.8.2-0.62.rc1.el6_9.4.ppc64.rpm
bind-debuginfo-9.8.2-0.62.rc1.el6_9.4.ppc.rpm
bind-debuginfo-9.8.2-0.62.rc1.el6_9.4.ppc64.rpm
bind-libs-9.8.2-0.62.rc1.el6_9.4.ppc.rpm
bind-libs-9.8.2-0.62.rc1.el6_9.4.ppc64.rpm
bind-utils-9.8.2-0.62.rc1.el6_9.4.ppc64.rpm

s390x:
bind-9.8.2-0.62.rc1.el6_9.4.s390x.rpm
bind-chroot-9.8.2-0.62.rc1.el6_9.4.s390x.rpm
bind-debuginfo-9.8.2-0.62.rc1.el6_9.4.s390.rpm
bind-debuginfo-9.8.2-0.62.rc1.el6_9.4.s390x.rpm
bind-libs-9.8.2-0.62.rc1.el6_9.4.s390.rpm
bind-libs-9.8.2-0.62.rc1.el6_9.4.s390x.rpm
bind-utils-9.8.2-0.62.rc1.el6_9.4.s390x.rpm

x86_64:
bind-9.8.2-0.62.rc1.el6_9.4.x86_64.rpm
bind-chroot-9.8.2-0.62.rc1.el6_9.4.x86_64.rpm
bind-debuginfo-9.8.2-0.62.rc1.el6_9.4.i686.rpm
bind-debuginfo-9.8.2-0.62.rc1.el6_9.4.x86_64.rpm
bind-libs-9.8.2-0.62.rc1.el6_9.4.i686.rpm
bind-libs-9.8.2-0.62.rc1.el6_9.4.x86_64.rpm
bind-utils-9.8.2-0.62.rc1.el6_9.4.x86_64.rpm

Red Hat Enterprise Linux Server Optional (v. 6):

i386:
bind-debuginfo-9.8.2-0.62.rc1.el6_9.4.i686.rpm
bind-devel-9.8.2-0.62.rc1.el6_9.4.i686.rpm
bind-sdb-9.8.2-0.62.rc1.el6_9.4.i686.rpm

ppc64:
bind-debuginfo-9.8.2-0.62.rc1.el6_9.4.ppc.rpm
bind-debuginfo-9.8.2-0.62.rc1.el6_9.4.ppc64.rpm
bind-devel-9.8.2-0.62.rc1.el6_9.4.ppc.rpm
bind-devel-9.8.2-0.62.rc1.el6_9.4.ppc64.rpm
bind-sdb-9.8.2-0.62.rc1.el6_9.4.ppc64.rpm

s390x:
bind-debuginfo-9.8.2-0.62.rc1.el6_9.4.s390.rpm
bind-debuginfo-9.8.2-0.62.rc1.el6_9.4.s390x.rpm
bind-devel-9.8.2-0.62.rc1.el6_9.4.s390.rpm
bind-devel-9.8.2-0.62.rc1.el6_9.4.s390x.rpm
bind-sdb-9.8.2-0.62.rc1.el6_9.4.s390x.rpm

x86_64:
bind-debuginfo-9.8.2-0.62.rc1.el6_9.4.i686.rpm
bind-debuginfo-9.8.2-0.62.rc1.el6_9.4.x86_64.rpm
bind-devel-9.8.2-0.62.rc1.el6_9.4.i686.rpm
bind-devel-9.8.2-0.62.rc1.el6_9.4.x86_64.rpm
bind-sdb-9.8.2-0.62.rc1.el6_9.4.x86_64.rpm

Red Hat Enterprise Linux Workstation (v. 6):

Source:
bind-9.8.2-0.62.rc1.el6_9.4.src.rpm

i386:
bind-9.8.2-0.62.rc1.el6_9.4.i686.rpm
bind-chroot-9.8.2-0.62.rc1.el6_9.4.i686.rpm
bind-debuginfo-9.8.2-0.62.rc1.el6_9.4.i686.rpm
bind-libs-9.8.2-0.62.rc1.el6_9.4.i686.rpm
bind-utils-9.8.2-0.62.rc1.el6_9.4.i686.rpm

x86_64:
bind-9.8.2-0.62.rc1.el6_9.4.x86_64.rpm
bind-chroot-9.8.2-0.62.rc1.el6_9.4.x86_64.rpm
bind-debuginfo-9.8.2-0.62.rc1.el6_9.4.i686.rpm
bind-debuginfo-9.8.2-0.62.rc1.el6_9.4.x86_64.rpm
bind-libs-9.8.2-0.62.rc1.el6_9.4.i686.rpm
bind-libs-9.8.2-0.62.rc1.el6_9.4.x86_64.rpm
bind-utils-9.8.2-0.62.rc1.el6_9.4.x86_64.rpm

Red Hat Enterprise Linux Workstation Optional (v. 6):

i386:
bind-debuginfo-9.8.2-0.62.rc1.el6_9.4.i686.rpm
bind-devel-9.8.2-0.62.rc1.el6_9.4.i686.rpm
bind-sdb-9.8.2-0.62.rc1.el6_9.4.i686.rpm

x86_64:
bind-debuginfo-9.8.2-0.62.rc1.el6_9.4.i686.rpm
bind-debuginfo-9.8.2-0.62.rc1.el6_9.4.x86_64.rpm
bind-devel-9.8.2-0.62.rc1.el6_9.4.i686.rpm
bind-devel-9.8.2-0.62.rc1.el6_9.4.x86_64.rpm
bind-sdb-9.8.2-0.62.rc1.el6_9.4.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-2017-3142
https://access.redhat.com/security/cve/CVE-2017-3143
https://access.redhat.com/security/updates/classification/#important
https://kb.isc.org/article/AA-01503
https://kb.isc.org/article/AA-01504

8. Contact:

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

Copyright 2017 Red Hat, Inc.
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