Bug 1411367 (CVE-2016-9147)

Summary: CVE-2016-9147 bind: assertion failure while handling a query response containing inconsistent DNSSEC information
Product: [Other] Security Response Reporter: Dhiru Kholia <dkholia>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact: Petr Sklenar <psklenar>
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: pemensik, security-response-team, sjayapra, slawomir, slong, yozone
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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Fixed In Version: Doc Type: If docs needed, set a value
Doc Text:
A denial of service flaw was found in the way BIND handled a query response containing inconsistent DNSSEC information. A remote attacker could use this flaw to make named exit unexpectedly with an assertion failure via a specially crafted DNS response.
 Story Points: ---
Clone Of: Environment:
Last Closed: 2017-07-25 20:45:21 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 1411417, 1411418, 1411680, 1411681, 1411682, 1411684, 1412457, 1412458, 1457187, 1467239, 1467240, 1467241, 1467242, 1467243    
Bug Blocks: 1411339    

Description Dhiru Kholia 2017-01-09 14:54:42 UTC 
An error handling a query response containing inconsistent DNSSEC information could cause an assertion failure.

Depending on the type of query and the EDNS options in the query they receive, DNSSEC-enabled authoritative servers are expected to include RRSIG and other RRsets in their responses to recursive servers. DNSSEC validating servers will also make specific queries for DS and other RRsets. Whether DNSSEC-validating or not, an error in processing malformed query responses that contain DNSSEC-related RRsets that are inconsistent with other RRsets in the same query response can trigger an assertion failure. Although the combination of properties which triggers the assertion should not occur in normal traffic, it is potentially possible for the assertion to be triggered deliberately by an attacker sending a specially-constructed answer.

This vulnerability occurs during the processing of an answer packet received in response to a query. As a result, recursive servers are at the greatest risk; authoritative servers are at risk only to the extent that they perform a limited set of queries.

This description is borrowed from the upstream advisory.
Comment 1 Dhiru Kholia 2017-01-09 14:54:56 UTC 
Acknowledgments:

Name: ISC
Comment 8 Dhiru Kholia 2017-01-12 05:13:01 UTC 
Created bind tracking bugs for this issue:

Affects: fedora-all [bug 1412457]
Comment 9 Dhiru Kholia 2017-01-12 05:13:09 UTC 
Created bind99 tracking bugs for this issue:

Affects: fedora-all [bug 1412458]
Comment 10 Dhiru Kholia 2017-01-12 05:14:30 UTC 
External References:

https://kb.isc.org/article/AA-01440
Comment 11 errata-xmlrpc 2017-01-16 05:51:33 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2017:0062 https://rhn.redhat.com/errata/RHSA-2017-0062.html
Comment 12 errata-xmlrpc 2017-01-16 06:01:35 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 5
  Red Hat Enterprise Linux 6

Via RHSA-2017:0063 https://rhn.redhat.com/errata/RHSA-2017-0063.html
Comment 13 errata-xmlrpc 2017-01-16 06:31:45 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 5

Via RHSA-2017:0064 https://rhn.redhat.com/errata/RHSA-2017-0064.html
Comment 16 errata-xmlrpc 2017-06-28 09:01:51 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7.2 Extended Update Support

Via RHSA-2017:1583 https://access.redhat.com/errata/RHSA-2017:1583