Bug 1330418 – CVE-2015-8866 php: libxml_disable_entity_loader setting is shared between threads

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Bug 1330418 - (CVE-2015-8866) CVE-2015-8866 php: libxml_disable_entity_loader setting is shared between threads

Summary:	CVE-2015-8866 php: libxml_disable_entity_loader setting is shared between thr...

Status:	CLOSED WONTFIX

Aliases:	CVE-2015-8866

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

Priority	low Severity low
Target Milestone:	---
Target Release:	---
Assigned To:	Red Hat Product Security
QA Contact:
Docs Contact:

URL:
Whiteboard:	impact=low,public=20160421,reported=2...
Keywords:	Security

Depends On:
Blocks:	1323121
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Reported:	2016-04-26 04:11 EDT by Martin Prpič
Modified:	2017-11-29 09:42 EST (History)
CC List:	15 users (show)

See Also:
Fixed In Version:	php 5.5.34, php 5.6.20, php 7.0.5
Doc Type:	Bug Fix
Doc Text:
Story Points:	---
Clone Of:
Environment:
Last Closed:	2017-06-23 07:04:04 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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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 Martin Prpič 2016-04-26 04:11:03 EDT

It was discovered that the PHP libxml_disable_entity_loader() setting was shared between threads. When running under PHP-FPM, this could result in XML external entity injection and entity expansion issues.

Upstream bug:

https://bugs.php.net/bug.php?id=64938

Upstream patch:

https://git.php.net/?p=php-src.git;a=commit;h=de31324c221c1791b26350ba106cc26bad23ace9

Comment 1 Martin Prpič 2016-04-26 04:12:34 EDT

Fixed in Fedora:

php-5.6.20-1.fc23
php-5.6.20-1.fc24
php-5.6.20-1.fc22

Comment 2 Remi Collet 2016-04-26 05:26:38 EDT

Notice: this bug is fixed since 5.5.22 / 5.6.6

Default value is entity_loader_disabled=0, which means external entity is enabled by default.

Because of this bug it can be wrongly set to disabled between various request.

So, I don't think this is a "security" issue.

Comment 3 errata-xmlrpc 2016-11-15 06:51:11 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

Comment 4 Remi Collet 2017-11-29 09:42:44 EST

Notice that this issue was not fixed for FPM.

See https://bugs.php.net/bug.php?id=64938

The fix will be in upcoming 7.0.27 / 7.1.13 / 7.2.1

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