PHP up to 5.6.3 process_nested_data use after free

CVSS Meta Temp Score
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CTI Interest Score
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8.5$0-$5k0.00

Summaryinfo

A vulnerability classified as critical was found in PHP. This impacts the function process_nested_data. Executing a manipulation can lead to use after free. This vulnerability is tracked as CVE-2014-8142. The attack can be launched remotely. Moreover, an exploit is present. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as critical was found in PHP (Programming Language Software). This vulnerability affects the function process_nested_data. The manipulation with an unknown input leads to a use after free vulnerability. The CWE definition for the vulnerability is CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. As an impact it is known to affect confidentiality, integrity, and availability.

The weakness was disclosed 12/29/2014 by Stefan Esser as Bug 68594 as confirmed bug report (Bug Tracker). The advisory is shared for download at bugs.php.net. This vulnerability was named CVE-2014-8142 since 10/10/2014. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details and also a public exploit are known.

A public exploit has been developed by SEC Consult and been published 2 years after the advisory. It is possible to download the exploit at exploit-db.com. It is declared as proof-of-concept. As 0-day the estimated underground price was around $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 84345 (CentOS 7 : php (CESA-2015:1135)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CentOS Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 185106 (HP-UX Apache Web Server Suite Remote Denial of Service Vulnerability (HPSBUX03337)).

Upgrading to version 5.5.20 or 5.6.4 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.php.net. The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published 7 months after the disclosure of the vulnerability. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 19329.

The vulnerability is also documented in the databases at X-Force (99805), Exploit-DB (40414), Tenable (84345), SecurityFocus (BID 71791†) and Vulnerability Center (SBV-56866†). Additional details are provided at bugzilla.redhat.com. The entries VDB-67181, VDB-67182, VDB-67185 and VDB-67631 are pretty similar. Once again VulDB remains the best source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
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CVSSv3info

VulDB Meta Base Score: 9.8
VulDB Meta Temp Score: 8.5

VulDB Base Score: 9.8
VulDB Temp Score: 8.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Author: SEC Consult
Download: 🔍

EPSS Score: 🔍
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Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 84345
Nessus Name: CentOS 7 : php (CESA-2015:1135)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

OpenVAS ID: 14611
OpenVAS Name: Amazon Linux Local Check: alas-2015-475
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
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Exploit-DB: 🔍

Threat Intelligenceinfo

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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
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Exploit Delay Time: 🔍

Upgrade: PHP 5.5.20/5.6.4
Patch: 630f9c33c23639de85c3fd306b209b538b73b4c9
TippingPoint: 🔍

McAfee IPS: 🔍
McAfee IPS Version: 🔍

Fortigate IPS: 🔍

Timelineinfo

10/10/2014 🔍
12/17/2014 +68 days 🔍
12/20/2014 +2 days 🔍
12/29/2014 +9 days 🔍
01/13/2015 +15 days 🔍
06/23/2015 +160 days 🔍
06/24/2015 +1 days 🔍
07/20/2015 +26 days 🔍
03/01/2016 +226 days 🔍
09/22/2016 +204 days 🔍
09/22/2016 +0 days 🔍
03/02/2022 +1987 days 🔍

Sourcesinfo

Product: php.org

Advisory: Bug 68594
Researcher: Stefan Esser
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2014-8142 (🔍)
GCVE (CVE): GCVE-0-2014-8142
GCVE (VulDB): GCVE-100-68572

OVAL: 🔍

X-Force: 99805 - PHP process_nested_data code execution, High Risk
SecurityFocus: 71791 - PHP 'process_nested_data()' Function Use After Free Remote Code Execution Vulnerability
Vulnerability Center: 56866 - PHP Remote Code Execution via a Crafted Unserialize Call - CVE-2014-8142, High

scip Labs: https://www.scip.ch/en/?labs.20161013
Misc.: 🔍
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Entryinfo

Created: 01/13/2015 14:32
Updated: 03/02/2022 08:10
Changes: 01/13/2015 14:32 (71), 08/24/2018 09:25 (27), 03/02/2022 08:10 (3)
Complete: 🔍
Cache ID: 216:292:103

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