PHP up to 5.5.21/5.6.5 PHP-FPM ext/libxml/libxml.c xml external entity reference

CVSS Meta Temp Score
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CTI Interest Score
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8.3$0-$5k0.00

Summaryinfo

A vulnerability identified as critical has been detected in PHP up to 5.5.21/5.6.5. Impacted is an unknown function in the library ext/libxml/libxml.c of the component PHP-FPM. This manipulation causes xml external entity reference. This vulnerability is registered as CVE-2015-8866. No exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability has been found in PHP up to 5.5.21/5.6.5 (Programming Language Software) and classified as critical. Affected by this vulnerability is some unknown functionality in the library ext/libxml/libxml.c of the component PHP-FPM. The manipulation with an unknown input leads to a xml external entity reference vulnerability. The CWE definition for the vulnerability is CWE-611. The product processes an XML document that can contain XML entities with URIs that resolve to documents outside of the intended sphere of control, causing the product to embed incorrect documents into its output. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

ext/libxml/libxml.c in PHP before 5.5.22 and 5.6.x before 5.6.6, when PHP-FPM is used, does not isolate each thread from libxml_disable_entity_loader changes in other threads, which allows remote attackers to conduct XML External Entity (XXE) and XML Entity Expansion (XEE) attacks via a crafted XML document, a related issue to CVE-2015-5161.

The weakness was published 05/22/2016 (Website). The advisory is shared at bugs.php.net. This vulnerability is known as CVE-2015-8866 since 04/23/2016. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 81512 (PHP 5.6.x < 5.6.6 Multiple Vulnerabilities (GHOST)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CGI abuses and running in the context r. The commercial vulnerability scanner Qualys is able to test this issue with plugin 168805 (SUSE Enterprise Linux Security update for php53 (SUSE-SU-2016:1310-1)).

Upgrading to version 5.5.22 or 5.6.6 eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (81512) and SecurityFocus (BID 87470†). Similar entries are available at VDB-87430 and VDB-87566. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.4
VulDB Meta Temp Score: 8.3

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.6
NVD Vector: 🔍

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Xml external entity reference
CWE: CWE-611 / CWE-610
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 81512
Nessus Name: PHP 5.6.x < 5.6.6 Multiple Vulnerabilities (GHOST)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 53473
OpenVAS Name: SuSE Update for php5 openSUSE-SU-2016:1274-1 (php5)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: PHP 5.5.22/5.6.6
Patch: de31324c221c1791b26350ba106cc26bad23ace9

Timelineinfo

02/19/2015 🔍
02/25/2015 +6 days 🔍
04/23/2016 +423 days 🔍
04/23/2016 +0 days 🔍
05/21/2016 +28 days 🔍
05/22/2016 +1 days 🔍
05/23/2016 +1 days 🔍
08/21/2022 +2281 days 🔍

Sourcesinfo

Product: php.org

Advisory: USN-2952-1
Status: Not defined
Confirmation: 🔍

CVE: CVE-2015-8866 (🔍)
GCVE (CVE): GCVE-0-2015-8866
GCVE (VulDB): GCVE-100-87565
SecurityFocus: 87470 - PHP 'libxml_disable_entity_loader()' CVE-2015-8866 XML External Entity Injection Vulnerability

See also: 🔍

Entryinfo

Created: 05/23/2016 10:30
Updated: 08/21/2022 13:53
Changes: 05/23/2016 10:30 (72), 12/09/2018 11:22 (6), 08/21/2022 13:46 (6), 08/21/2022 13:53 (1)
Complete: 🔍
Cache ID: 216::103

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