Bug 1341462 (CVE-2016-4450)

Summary:	CVE-2016-4450 nginx: NULL pointer dereference while writing client request body
Product:	[Other] Security Response	Reporter:	Andrej Nemec <anemec>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	affix, athmanem, bperkins, dkholia, hhorak, jeremy, jkaluza, jorton, pavel.lisy, peter.borsa, webstack-team, wtogami
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	nginx 1.11.1, nginx 1.10.1	Doc Type:	Bug Fix
Doc Text:	A NULL pointer dereference flaw was found in the nginx code responsible for saving client request body to a temporary file. A remote attacker could send a specially crafted request that would cause nginx worker process to crash.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2016-07-14 11:21:58 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:	1341463, 1341464, 1342443
Bug Blocks:	1341465

Description Andrej Nemec 2016-06-01 06:34:34 UTC

A vulnerability was found in nginx code responsible for saving
client request body to a temporary file.  A specially crafted request
might result in worker process crash due to a NULL pointer dereference
while writing client request body to a temporary file.

External references:

http://mailman.nginx.org/pipermail/nginx-announce/2016/000179.html

Upstream patches:

[nginx 1.9.13 - 1.11.0]
http://nginx.org/download/patch.2016.write.txt

[nginx 1.3.9 - 1.9.12]
http://nginx.org/download/patch.2016.write2.txt

Comment 1 Andrej Nemec 2016-06-01 06:35:29 UTC

Created nginx tracking bugs for this issue:

Affects: fedora-all [bug 1341463]
Affects: epel-all [bug 1341464]

Comment 2 Dhiru Kholia 2016-06-03 08:34:48 UTC

Upstream bug, https://trac.nginx.org/nginx/ticket/981

Comment 5 errata-xmlrpc 2016-07-14 05:50:38 UTC

This issue has been addressed in the following products:

  Red Hat Software Collections for Red Hat Enterprise Linux 7.2 EUS
  Red Hat Software Collections for Red Hat Enterprise Linux 7.1 EUS
  Red Hat Software Collections for Red Hat Enterprise Linux 7
  Red Hat Software Collections for Red Hat Enterprise Linux 6
  Red Hat Software Collections for Red Hat Enterprise Linux 6.6 EUS
  Red Hat Software Collections for Red Hat Enterprise Linux 6.7 EUS

Via RHSA-2016:1425 https://access.redhat.com/errata/RHSA-2016:1425

Comment 6 Fedora Update System 2016-09-06 20:15:58 UTC

nginx-1.10.1-1.el5 has been pushed to the Fedora EPEL 5 stable repository. If problems still persist, please make note of it in this bug report.

Comment 7 Fedora Update System 2016-09-06 21:17:24 UTC

nginx-1.10.1-1.el6 has been pushed to the Fedora EPEL 6 stable repository. If problems still persist, please make note of it in this bug report.

Comment 8 Fedora Update System 2016-09-06 21:18:24 UTC

nginx-1.10.1-1.el6 has been pushed to the Fedora EPEL 6 stable repository. If problems still persist, please make note of it in this bug report.