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Category:   Application (Generic)  >   BIND Vendors:   ISC (Internet Software Consortium)
BIND DNS64 State Error Lets Remote Users Cause the Target Service to Crash
SecurityTracker Alert ID:  1038259
SecurityTracker URL:  http://securitytracker.com/id/1038259
CVE Reference:   CVE-2017-3136   (Links to External Site)
Date:  Apr 13 2017
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 9.8.0 - 9.8.8-P1, 9.9.0 - 9.9.9-P6, 9.9.10b1 - 9.9.10rc1, 9.10.0 - 9.10.4-P6, 9.10.5b1 - 9.10.5rc1, 9.11.0 - 9.11.0-P3, 9.11.1b1 - 9.11.1rc1, 9.9.3-S1 - 9.9.9-S8
Description:   A vulnerability was reported in BIND. A remote user can cause the target service to crash.

A remote user can supply a specially crafted query to trigger a flaw in the DNS64 feature and cause the target service to crash.

Systems configured to use DNS64 and configured with the "break-dnssec yes;" option are affected.

Oleg Gorokhov of Yandex reported this vulnerability.

Impact:   A remote user can cause the target service to crash.
Solution:   The vendor has issued a fix (9.9.9-P8, 9.10.4-P8, 9.11.0-P5).

The vendor advisory is available at:

https://kb.isc.org/article/AA-01465

Vendor URL:  kb.isc.org/article/AA-01465 (Links to External Site)
Cause:   State error
Underlying OS:  Linux (Any), UNIX (Any)

Message History:   This archive entry has one or more follow-up message(s) listed below.
Apr 19 2017 (Red Hat Issues Fix) BIND DNS64 State Error Lets Remote Users Cause the Target Service to Crash
Red Hat has issued a fix for Red Hat Enterprise Linux 7.
Apr 19 2017 (CentOS Issues Fix) BIND DNS64 State Error Lets Remote Users Cause the Target Service to Crash
CentOS has issued a fix for CentOS 7.
Apr 20 2017 (Red Hat Issues Fix) BIND DNS64 State Error Lets Remote Users Cause the Target Service to Crash
Red Hat has issued a fix for Red Hat Enterprise Linux 6.
Apr 20 2017 (Oracle Issues Fix for Oracle Linux) BIND DNS64 State Error Lets Remote Users Cause the Target Service to Crash
Oracle has issued a fix for Oracle Linux 6.
Apr 21 2017 (Ubuntu Issues Fix) BIND DNS64 State Error Lets Remote Users Cause the Target Service to Crash
Ubuntu has issued a fix for Ubuntu Linux 12.04 LTS, 14.04 LTS, 16.04 LTS, 16.10, and 17.04.



 Source Message Contents

Date:  Wed, 12 Apr 2017 16:03:49 -0800
Subject:  CVE-2017-3136: An error handling synthesized records could cause an assertion failure when using DNS64 with "break-dnssec yes;"

CVE:                 CVE-2017-3136
Document Version:    2.0
Posting date:        12 April 2017
Program Impacted:    BIND
Versions affected:   9.8.0 -> 9.8.8-P1, 9.9.0 -> 9.9.9-P6,
9.9.10b1->9.9.10rc1,
                     9.10.0 -> 9.10.4-P6, 9.10.5b1->9.10.5rc1,
                     9.11.0 -> 9.11.0-P3, 9.11.1b1->9.11.1rc1,
                     9.9.3-S1 -> 9.9.9-S8
Severity:            Medium, but only a risk to systems with
                     specific configurations
Exploitable:         Remotely

Description:

   A query with a specific set of characteristics could cause a
   server using DNS64 to encounter an assertion failure and terminate.

   An attacker could deliberately construct a query, enabling
   denial-of-service against a server if it was configured to use
   the DNS64 feature and other preconditions were met.

Impact:

   Servers are at risk if they are configured to use DNS64 and if
   the option "break-dnssec yes;" is in use.

CVSS Score:          5.9
CVSS Vector:         CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

For more information on the Common Vulnerability Scoring System and
to obtain your specific environmental score please visit:
https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Workarounds:

   Servers which have configurations which require DNS64 and
   "break-dnssec yes;" should upgrade.  Servers which are not using
   these features in conjunction are not at risk from this defect.

Active exploits:

   No known active exploits.

Solution:

   Upgrade to the patched release most closely related to your
   current version of BIND. These can all be downloaded from
   http://www.isc.org/downloads.

   -  BIND 9 version 9.9.9-P8
   -  BIND 9 version 9.10.4-P8
   -  BIND 9 version 9.11.0-P5

   BIND Supported Preview Edition is a special feature preview
   branch of BIND provided to eligible ISC support customers.

   -  BIND 9 version 9.9.9-S10

   New development releases of BIND are also available which contain
   the fix for this vulnerability:

   -  BIND 9 version 9.9.10rc3
   -  BIND 9 version 9.10.5rc3
   -  BIND 9 version 9.11.1rc3

Acknowledgements:

   ISC would like to thank Oleg Gorokhov of Yandex for making us
   aware of this vulnerability.

Document Revision History:

   1.0 Advance Notification 08 March 2017
   1.1 Revised Publication Date; Added pre-releases to Versions Affected
       20 March 2017
   2.0 Public Announcement 12 April 2017

Related Documents:

   See our BIND9 Security Vulnerability Matrix at
   https://kb.isc.org/article/AA-00913 for a complete listing of
   Security Vulnerabilities and versions affected.

If you'd like more information on ISC Subscription Support and Advance
Security Notifications, please visit http://www.isc.org/support/.

Do you still have questions?  Questions regarding this advisory
should go to security-officer@isc.org.  To report a new issue,
please encrypt your message using security-officer@isc.org's PGP
key which can be found here:

   https://www.isc.org/downloads/software-support-policy/openpgp-key/.

If you are unable to use encrypted email, you may also report new
issues at: https://www.isc.org/community/report-bug/.

Note:

   ISC patches only currently supported versions. When possible we
   indicate EOL versions affected.  (For current information on
   which versions are actively supported, please see
   http://www.isc.org/downloads/).

ISC Security Vulnerability Disclosure Policy:
   Details of our current security advisory policy and practice can
   be found here: https://kb.isc.org/article/AA-00861

This Knowledge Base article https://kb.isc.org/article/AA-01465 is
the complete and official security advisory document.

Legal Disclaimer:

   Internet Systems Consortium (ISC) is providing this notice on
   an "AS IS" basis. No warranty or guarantee of any kind is expressed
   in this notice and none should be implied. ISC expressly excludes
   and disclaims any warranties regarding this notice or materials
   referred to in this notice, including, without limitation, any
   implied warranty of merchantability, fitness for a particular
   purpose, absence of hidden defects, or of non-infringement. Your
   use or reliance on this notice or materials referred to in this
   notice is at your own risk. ISC may change this notice at any
   time.  A stand-alone copy or paraphrase of the text of this
   document that omits the document URL is an uncontrolled copy.
   Uncontrolled copies may lack important information, be out of
   date, or contain factual errors.

(c) 2001-2017 Internet Systems Consortium
_______________________________________________
bind-announce mailing list
bind-announce@lists.isc.org
https://lists.isc.org/mailman/listinfo/bind-announce
 
 


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