Bug 1377352 (CVE-2016-7418)

Summary:	CVE-2016-7418 php: Null pointer dereference in php_wddx_push_element
Product:	[Other] Security Response	Reporter:	Adam Mariš <amaris>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	abhgupta, apmukher, dmcphers, fedora, hhorak, jialiu, jokerman, jorton, kseifried, lmeyer, mmccomas, rcollet, tiwillia, webstack-team
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	php 5.6.26, php 7.0.11	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2016-10-12 09:25:49 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:	1377366, 1554899
Bug Blocks:	1377365

Description Adam Mariš 2016-09-19 13:21:48 UTC

A null pointer vulnerability was found in function wddx_deserialize.

Upstream bug:

https://bugs.php.net/bug.php?id=73065

Upstream patch:

https://github.com/php/php-src/commit/c4cca4c20e75359c9a13a1f9a36cb7b4e9601d29?w=1

CVE assignment:

http://seclists.org/oss-sec/2016/q3/518

Comment 1 Adam Mariš 2016-09-19 13:38:06 UTC

Created php tracking bugs for this issue:

Affects: fedora-all [bug 1377366]

Comment 2 Huzaifa S. Sidhpurwala 2016-10-12 09:25:49 UTC

This issue happens when untrusted input is unserialized.  Doing so it documented as being unsafe:

  http://php.net/manual/en/function.unserialize.php

  Do not pass untrusted user input to unserialize(). Unserialization can
  result in code being loaded and executed due to object instantiation and
  autoloading, and a malicious user may be able to exploit this. Use a safe,
  standard data interchange format such as JSON (via json_decode() and
  json_encode()) if you need to pass serialized data to the user.

Comment 4 errata-xmlrpc 2018-05-03 05:05:23 UTC

This issue has been addressed in the following products:

  Red Hat Software Collections for Red Hat Enterprise Linux 6
  Red Hat Software Collections for Red Hat Enterprise Linux 6.7 EUS
  Red Hat Software Collections for Red Hat Enterprise Linux 7
  Red Hat Software Collections for Red Hat Enterprise Linux 7.3 EUS
  Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUS
  Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUS

Via RHSA-2018:1296 https://access.redhat.com/errata/RHSA-2018:1296