Bug 1404731 (CVE-2016-9935) - CVE-2016-9935 php: Invalid read when wddx decodes empty boolean element
Summary: CVE-2016-9935 php: Invalid read when wddx decodes empty boolean element
Keywords:
Status: CLOSED WONTFIX
Alias: CVE-2016-9935
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1404737 1554854
Blocks: 1404738
TreeView+ depends on / blocked
 
Reported: 2016-12-14 14:07 UTC by Adam Mariš
Modified: 2020-05-14 15:28 UTC (History)
18 users (show)

Fixed In Version: php 5.6.29, php 7.0.14
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2017-02-21 08:56:13 UTC
Embargoed:


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System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2018:1296 0 None None None 2018-05-03 05:05:51 UTC

Description Adam Mariš 2016-12-14 14:07:45 UTC
An invalid read occurs when wddx decodes empty boolean element, leading to arbitrary memory read or crash.

Upstream bug:

https://bugs.php.net/bug.php?id=73631

Upstream patch:

https://github.com/php/php-src/commit/66fd44209d5ffcb9b3d1bc1b9fd8e35b485040c0

CVE assignment:

http://seclists.org/oss-sec/2016/q4/658

Comment 1 Adam Mariš 2016-12-14 14:18:47 UTC
Created php tracking bugs for this issue:

Affects: fedora-all [bug 1404737]

Comment 4 Cedric Buissart 2017-02-20 16:15:45 UTC
This issue happens when untrusted input is unserialized. Doing so is documented as being unsafe:
http://php.net/manual/en/function.wddx-deserialize.php#refsect1-function.wddx-deserialize-notes

Warning
Do not pass untrusted user input to wddx_deserialize(). 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.

Comment 6 errata-xmlrpc 2018-05-03 05:05:41 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


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