Bug 1359710 – CVE-2016-6290 php: Use after free in unserialize() with Unexpected Session Deserialization

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Bug 1359710 - (CVE-2016-6290) CVE-2016-6290 php: Use after free in unserialize() with Unexpected Session Deserialization

Summary:	CVE-2016-6290 php: Use after free in unserialize() with Unexpected Session De...

Status:	CLOSED ERRATA

Aliases:	CVE-2016-6290

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:
Docs Contact:

URL:
Whiteboard:	impact=moderate,public=20160708,repor...
Keywords:	Security

Depends On:	1359837
Blocks:	1359830
	Show dependency tree / graph

Reported:	2016-07-25 06:38 EDT by Adam Mariš
Modified:	2016-11-15 10:11 EST (History)
CC List:	13 users (show)

See Also:
Fixed In Version:	php 5.5.38, php 5.6.24, php 7.0.9
Doc Type:	If docs needed, set a value
Doc Text:
Story Points:	---
Clone Of:
Environment:
Last Closed:	2016-08-04 02:33:31 EDT
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

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Add an attachment (proposed patch, testcase, etc.)

External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2016:2750	normal	SHIPPED_LIVE	Moderate: rh-php56 security, bug fix, and enhancement update	2016-11-15 11:40:02 EST

Groups: None (edit)

Description Adam Mariš 2016-07-25 06:38:33 EDT

A use-after-free vulnerability was found in unserialize() with Unexpected Session Deserialization.

Upstream bug:

https://bugs.php.net/bug.php?id=72562

Upstream patch:

http://git.php.net/?p=php-src.git;a=commit;h=3798eb6fd5dddb211b01d41495072fd9858d4e32

CVE assignment:

http://seclists.org/oss-sec/2016/q3/137

Comment 1 Adam Mariš 2016-07-25 10:12:44 EDT

Created php tracking bugs for this issue:

Affects: fedora-all [bug 1359837]

Comment 2 Huzaifa S. Sidhpurwala 2016-08-04 02:33:31 EDT

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 3 errata-xmlrpc 2016-11-15 06:43:18 EST

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 7.2 EUS
  Red Hat Software Collections for Red Hat Enterprise Linux 7.3 EUS

Via RHSA-2016:2750 https://rhn.redhat.com/errata/RHSA-2016-2750.html

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