Bug 1377314 (CVE-2016-7413)

Summary: CVE-2016-7413 php: Use after free in wddx_deserialize
Product: [Other] Security Response Reporter: Adam Mariš <amaris>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED WONTFIX QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: 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 09:11:42 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 12:30:33 UTC 
It was discovered that when WDDX tries to deserialize "recordset" element, use after free happens if close tag for the field is not found. This happens only when field names are set.

Upstream bug:

https://bugs.php.net/bug.php?id=72860

Upstream patch:

https://github.com/php/php-src/commit/b88393f08a558eec14964a55d3c680fe67407712?w=1

CVE assignment:

http://seclists.org/oss-sec/2016/q3/518
Comment 1 Adam Mariš 2016-09-19 13:37:26 UTC 
Created php tracking bugs for this issue:

Affects: fedora-all [bug 1377366]
Comment 2 Huzaifa S. Sidhpurwala 2016-10-12 09:11:42 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 05:04:50 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