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Category:   Application (Generic)  >   BIND Vendors:   ISC (Internet Software Consortium)
(Red Hat Issues Fix) BIND Input Validation Flaw in Control Channel Lets Remote Users Cause the Target Service to Crash
SecurityTracker Alert ID:  1035494
SecurityTracker URL:  http://securitytracker.com/id/1035494
CVE Reference:   CVE-2016-1285   (Links to External Site)
Date:  Apr 6 2016
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 9.2.0 - 9.8.8, 9.9.0 - 9.9.8-P3, 9.9.3-S1 - 9.9.8-S5, 9.10.0 - 9.10.3-P3
Description:   A vulnerability was reported in BIND. A remote user can cause the target service to crash.

A remote user on a system specified in the 'named.conf' controls address list can send a specially crafted packet to the target rndc control channel to trigger a parsing error in 'sexpr.c' or 'alist.c' and cause denial of service conditions for clients.

Systems that accept remote commands on the control channel are affected.

Impact:   A remote user can cause denial of service conditions on the target service.
Solution:   Red Hat has issued a fix.

The Red Hat advisory is available at:

https://rhn.redhat.com/errata/RHSA-2016-0601.html

Vendor URL:  rhn.redhat.com/errata/RHSA-2016-0601.html (Links to External Site)
Cause:   Input validation error
Underlying OS:  Linux (Red Hat Enterprise)
Underlying OS Comments:  6.2

Message History:   This archive entry is a follow-up to the message listed below.
Mar 10 2016 BIND Input Validation Flaw in Control Channel Lets Remote Users Cause the Target Service to Crash



 Source Message Contents

Subject:  [RHSA-2016:0601-01] Important: bind security update

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

Synopsis:          Important: bind security update
Advisory ID:       RHSA-2016:0601-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2016-0601.html
Issue date:        2016-04-06
CVE Names:         CVE-2016-1285 CVE-2016-1286 
=====================================================================

1. Summary:

An update for bind is now available for Red Hat Enterprise Linux 6.2
Advanced 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 Server AUS (v. 6.2) - x86_64
Red Hat Enterprise Linux Server Optional AUS (v. 6.2) - 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 denial of service flaw was found in the way BIND parsed signature
records for DNAME records. By sending a specially crafted query, a remote
attacker could use this flaw to cause named to crash. (CVE-2016-1286)

* A denial of service flaw was found in the way BIND processed certain
control channel input. A remote attacker able to send a malformed packet to
the control channel could use this flaw to cause named to crash.
(CVE-2016-1285)

Red Hat would like to thank ISC for reporting these issues.

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/):

1315674 - CVE-2016-1285 bind: malformed packet sent to rndc can trigger assertion failure
1315680 - CVE-2016-1286 bind: malformed signature records for DNAME records can trigger assertion failure

6. Package List:

Red Hat Enterprise Linux Server AUS (v. 6.2):

Source:
bind-9.7.3-8.P3.el6_2.4.src.rpm

x86_64:
bind-9.7.3-8.P3.el6_2.4.x86_64.rpm
bind-chroot-9.7.3-8.P3.el6_2.4.x86_64.rpm
bind-debuginfo-9.7.3-8.P3.el6_2.4.i686.rpm
bind-debuginfo-9.7.3-8.P3.el6_2.4.x86_64.rpm
bind-libs-9.7.3-8.P3.el6_2.4.i686.rpm
bind-libs-9.7.3-8.P3.el6_2.4.x86_64.rpm
bind-utils-9.7.3-8.P3.el6_2.4.x86_64.rpm

Red Hat Enterprise Linux Server Optional AUS (v. 6.2):

Source:
bind-9.7.3-8.P3.el6_2.4.src.rpm

x86_64:
bind-debuginfo-9.7.3-8.P3.el6_2.4.i686.rpm
bind-debuginfo-9.7.3-8.P3.el6_2.4.x86_64.rpm
bind-devel-9.7.3-8.P3.el6_2.4.i686.rpm
bind-devel-9.7.3-8.P3.el6_2.4.x86_64.rpm
bind-sdb-9.7.3-8.P3.el6_2.4.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-2016-1285
https://access.redhat.com/security/cve/CVE-2016-1286
https://access.redhat.com/security/updates/classification/#important
https://kb.isc.org/article/AA-01352
https://kb.isc.org/article/AA-01353

8. Contact:

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

Copyright 2016 Red Hat, Inc.
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