Bug 1651871 (CVE-2018-19115)

Summary:	CVE-2018-19115 keepalived: Heap-based buffer overflow when parsing HTTP status codes allows for denial of service or possibly arbitrary code execution
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:	apevec, athmanem, bperkins, chrisw, cluster-maint, markmc, matthias, rohara, tdecacqu
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	keepalived 2.0.9	Doc Type:	If docs needed, set a value
Doc Text:	Heap-based buffer overflow vulnerability in extract_status_code() function in lib/html.c that parses HTTP status code returned from web server allows malicious web server or man-in-the-middle attacker pretending to be a web server to cause either a denial of service or potentially execute arbitrary code on keepalived load balancer.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-06-10 10:42:54 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:	1651873, 1652399, 1652693, 1652694, 1719353, 1719471
Bug Blocks:	1651865

Description Sam Fowler 2018-11-21 05:47:03 UTC

keepalived before version 2.0.9 has a heap-based buffer overflow when parsing HTTP status codes resulting in DoS or possibly unspecified other impact, because extract_status_code in lib/html.c has no validation of the status code and instead writes an unlimited amount of data to the heap.


Upstream Patch:

https://github.com/acassen/keepalived/pull/961/commits/f28015671a4b04785859d1b4b1327b367b6a10e9


Reference:

https://bugzilla.suse.com/show_bug.cgi?id=1015141

Comment 1 Sam Fowler 2018-11-21 05:47:32 UTC

Created keepalived tracking bugs for this issue:

Affects: fedora-all [bug 1651873]

Comment 7 Adam Mariš 2018-11-29 14:25:59 UTC

Statement:

This issue affects the versions of keepalived as shipped with Red Hat Enterprise Linux 6 and 7.

Red Hat Enterprise Linux 6 is now in Maintenance Support 2 Phase of the support and maintenance life cycle. This has been rated as having a security impact of Important, and is not currently planned to be addressed in future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/.

Comment 8 Tomas Hoger 2019-01-03 19:26:15 UTC

Upstream bug report:

https://github.com/acassen/keepalived/issues/960

Comment 9 errata-xmlrpc 2019-01-03 21:37:46 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2019:0022 https://access.redhat.com/errata/RHSA-2019:0022

Comment 12 errata-xmlrpc 2019-07-16 13:45:47 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7.5 Extended Update Support

Via RHSA-2019:1792 https://access.redhat.com/errata/RHSA-2019:1792

Comment 13 errata-xmlrpc 2019-07-30 09:08:42 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7.4 Extended Update Support

Via RHSA-2019:1945 https://access.redhat.com/errata/RHSA-2019:1945