Bug 1708641 (CVE-2019-6470)

Summary:	CVE-2019-6470 dhcp: double-deletion of the released addresses in the dhcpv6 code leading to crash and possible DoS
Product:	[Other] Security Response	Reporter:	Marian Rehak <mrehak>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	bmcclain, dblechte, dfediuck, eedri, jpopelka, mgoldboi, michal.skrivanek, pemensik, pzhukov, sbonazzo, sherold, thozza, yozone, yturgema
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	dhcp 4.4.1	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-08-06 19:21:04 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:	1641246, 1704672, 1704675, 1708642
Bug Blocks:	1708644

Description Marian Rehak 2019-05-10 12:51:17 UTC

Double-deletion of the released addresses in the dhcpv6 code leading to crash and possible DoS. This issue was introduced by a commit which fixes a bug in the ISC heap library.

Comment 1 Marian Rehak 2019-05-10 12:51:35 UTC

Created dhcp tracking bugs for this issue:

Affects: fedora-all [bug 1708642]

Comment 2 Doran Moppert 2019-05-15 06:13:42 UTC

This flaw is in the dhcp server code (binary package dhcp), client-side code is not affected.

Comment 3 Marian Rehak 2019-05-16 09:35:27 UTC

Upstream patch:

https://source.isc.org/cgi-bin/gitweb.cgi?p=dhcp.git;a=commit;h=abacf8ad0d8844685e5cd76645a34ef2b8da3253

Comment 5 Marian Rehak 2019-05-17 09:59:15 UTC

External References:

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=896122

Comment 7 Riccardo Schirone 2019-05-21 15:05:26 UTC

Another reference:
https://bugzilla.redhat.com/show_bug.cgi?id=1641246

Comment 10 errata-xmlrpc 2019-08-06 12:09:38 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2019:2060 https://access.redhat.com/errata/RHSA-2019:2060

Comment 11 Product Security DevOps Team 2019-08-06 19:21:04 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-2019-6470

Comment 12 errata-xmlrpc 2019-11-05 21:06:47 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2019:3525 https://access.redhat.com/errata/RHSA-2019:3525