Bug 1391000 – CVE-2016-9137 php: Use after free in unserialize()

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Bug 1391000 - (CVE-2016-9137) CVE-2016-9137 php: Use after free in unserialize()

Summary:	CVE-2016-9137 php: Use after free in unserialize()

Status:	CLOSED WONTFIX

Aliases:	CVE-2016-9137

Product:	Security Response
Classification:	Other
Component:	vulnerability (Show other bugs)
Sub Component:
Version:	unspecified
Hardware:	All Linux

Priority	medium Severity medium
Target Milestone:	---
Target Release:	---
Assigned To:	Red Hat Product Security
QA Contact:
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URL:
Whiteboard:	impact=moderate,public=20160923,repor...
Keywords:	Security

Depends On:	1391008
Blocks:
	Show dependency tree / graph

Reported:	2016-11-02 07:39 EDT by Adam Mariš
Modified:	2016-11-02 09:10 EDT (History)
CC List:	14 users (show)

See Also:
Fixed In Version:	php 5.6.27, php 7.0.12
Doc Type:	If docs needed, set a value
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Story Points:	---
Clone Of:
Environment:
Last Closed:	2016-11-02 07:42:28 EDT
Type:	---
Regression:	---
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oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
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Description Adam Mariš 2016-11-02 07:39:58 EDT

A use after free vulnerability was found in unserialize().

Upstream bug:

https://bugs.php.net/bug.php?id=73147

Upstream patch:

https://git.php.net/?p=php-src.git;a=commit;h=0e6fe3a4c96be2d3e88389a5776f878021b4c59f

CVE assignment:

http://seclists.org/oss-sec/2016/q4/296

Comment 1 Adam Mariš 2016-11-02 07:40:35 EDT

Created php tracking bugs for this issue:

Affects: fedora-all [bug 1391008]

Comment 2 Adam Mariš 2016-11-02 07:42:28 EDT

This issue happens when untrusted input is unserialized. Doing so is 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.

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