Joomla CMS up to 3.6.3 Registration input validation

CVSS Meta Temp Score
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CTI Interest Score
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7.7$0-$5k0.00

A vulnerability was found in Joomla CMS up to 3.6.3 (Content Management System) and classified as critical. This issue affects an unknown code block of the component Registration. The manipulation with an unknown input leads to a input validation vulnerability. Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

The register method in the UsersModelRegistration class in controllers/user.php in the Users component in Joomla! before 3.6.4 allows remote attackers to gain privileges by leveraging incorrect use of unfiltered data when registering on a site.

The bug was discovered 10/25/2016. The weakness was shared 10/25/2016 by Davide Tampellini as confirmed advisory (Website). It is possible to read the advisory at developer.joomla.org. The identification of this vulnerability is CVE-2016-8869 since 10/21/2016. The exploitation is known to be easy. The attack may be initiated remotely. The requirement for exploitation is a simple authentication. Technical details are unknown but a public exploit is available.

A public exploit has been developed by Xiphos Research Ltd. and been published 2 days after the advisory. The exploit is available at github.com. It is declared as highly functional. The vulnerability was handled as a non-public zero-day exploit for at least 4 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 94355 (Joomla! 3.4.4 < 3.6.4 Multiple Vulnerabilities), 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 11710 (Joomla! Core Privilege Escalation and Account Creation Vulnerabilities).

Upgrading to version 3.6.4 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (94355) and Exploit-DB (40637). The entries 93118 and 95859 are related to this item.

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CPE 2.3info

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CVSSv4info

VulDB CVSS-B Score: 🔍
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CVSSv3info

VulDB Meta Base Score: 8.0
VulDB Meta Temp Score: 7.7

VulDB Base Score: 6.3
VulDB Temp Score: 5.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
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Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Highly functional
Author: Xiphos Research Ltd.
Download: 🔍

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Nessus ID: 94355
Nessus Name: Joomla! 3.4.4 < 3.6.4 Multiple Vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 703029
OpenVAS Name: Joomla Core < 3.6.4 Multiple Vulnerabilities
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

MetaSploit ID: joomla_registration_privesc.rb
MetaSploit Name: Joomla Account Creation and Privilege Escalation
MetaSploit File: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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Upgrade: CMS 3.6.4
Patch: github.com

Timelineinfo

10/21/2016 🔍
10/21/2016 +0 days 🔍
10/25/2016 +4 days 🔍
10/25/2016 +0 days 🔍
10/25/2016 +0 days 🔍
10/25/2016 +0 days 🔍
10/26/2016 +1 days 🔍
10/27/2016 +1 days 🔍
10/27/2016 +0 days 🔍
10/28/2016 +1 days 🔍
10/28/2016 +0 days 🔍
11/04/2016 +7 days 🔍
09/28/2022 +2154 days 🔍

Sourcesinfo

Vendor: joomla.org

Advisory: bae1d43938c878480cfd73671e4945211538fdcf
Researcher: Davide Tampellini
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-8869 (🔍)
SecurityTracker: 1037108
SecurityFocus: 93883 - Joomla! Core CVE-2016-8869 Remote Privilege Escalation Vulnerability

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 10/28/2016 11:15
Updated: 09/28/2022 14:41
Changes: 10/28/2016 11:15 (96), 07/25/2019 09:23 (5), 09/28/2022 14:41 (4)
Complete: 🔍

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