Bug 1762957 (CVE-2019-6476)

Summary: CVE-2019-6476 bind: An error in QNAME minimization code can cause BIND to exit with an assertion failure
Product: [Other] Security Response Reporter: kat <kbost>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED NOTABUG QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: anon.amish, huzaifas, mkaplan, mruprich, msehnout, pemensik, pzhukov, thozza, vonsch, yozone, zdohnal
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: bind 9.15.5, bind 9.14.7 Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2019-10-22 18:51:24 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: 1762958    
Bug Blocks: 1762961    

Description kat 2019-10-17 21:49:01 UTC 
A defect in code added to support QNAME minimization can cause named to exit with an assertion failure if a forwarder returns a referral rather than resolving the query.

https://kb.isc.org/docs/cve-2019-6476
Comment 1 kat 2019-10-17 21:49:14 UTC 
Created bind tracking bugs for this issue:

Affects: fedora-all [bug 1762958]
Comment 2 Tomas Hoger 2019-10-18 12:36:35 UTC 
External References:

https://kb.isc.org/docs/cve-2019-6476
Comment 3 Tomas Hoger 2019-10-20 21:12:49 UTC 
Upstream commit (9.15 branch):

https://gitlab.isc.org/isc-projects/bind9/commit/6923a80357d634ee7b701c1ad4fad9b3db95f8c8
Comment 4 Huzaifa S. Sidhpurwala 2019-10-22 05:03:35 UTC 
Statement:

This flaw did not affect the versions of bind shipped with Red Hat Enterprise Linux 6, 7 and 8.
Comment 5 Product Security DevOps Team 2019-10-22 18:51:24 UTC 
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2019-6476