Bug 1658876 (CVE-2018-20103)

Summary:	CVE-2018-20103 haproxy: Infinite recursion via crafted packet allows stack exhaustion and denial of service
Product:	[Other] Security Response	Reporter:	Sam Fowler <sfowler>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	abhgupta, ahardin, bleanhar, bperkins, carl, ccoleman, dbaker, dedgar, eparis, hhorak, jeremy, jgoulding, jokerman, jorton, mchappel, pasik, rohara, sfowler, sthangav, trankin
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	haproxy 1.8.15	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-07-12 13:06:25 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:	1658881, 1659018, 1659019, 1660100, 1660101, 1660102, 1660103
Bug Blocks:	1658879

Description Sam Fowler 2018-12-13 05:04:27 UTC

An issue was discovered in dns.c in HAProxy through 1.8.14. In the case of a compressed pointer, a crafted packet can trigger infinite recursion by making the pointer point to itself, or create a long chain of valid pointers resulting in stack exhaustion.


Upstream Patch:

http://git.haproxy.org/?p=haproxy.git;a=commit;h=58df5aea

Comment 1 Sam Fowler 2018-12-13 05:14:54 UTC

Created haproxy tracking bugs for this issue:

Affects: fedora-all [bug 1658881]

Comment 2 Sam Fowler 2018-12-13 05:34:24 UTC

External Reference:

https://www.mail-archive.com/haproxy@formilux.org/msg32055.html

Comment 3 Stefan Cornelius 2018-12-13 11:00:44 UTC

Statement:

This issue did not affect the versions of haproxy as shipped with Red Hat Enterprise Linux 6 and 7.

Comment 6 errata-xmlrpc 2019-06-11 12:01:31 UTC

This issue has been addressed in the following products:

  Red Hat Software Collections for Red Hat Enterprise Linux 7
  Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUS
  Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUS
  Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUS

Via RHSA-2019:1436 https://access.redhat.com/errata/RHSA-2019:1436

Comment 7 Product Security DevOps Team 2019-07-12 13:06:25 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-2018-20103