Moodle 2.x/3.x Question Engine access control

CVSS Meta Temp Score
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CTI Interest Score
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5.7$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in Moodle 2.x/3.x. The impacted element is an unknown function of the component Question Engine. Executing a manipulation can lead to access control. This vulnerability is registered as CVE-2016-8642. It is possible to launch the attack remotely. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Moodle 2.x/3.x (Learning Management Software). It has been declared as critical. This vulnerability affects an unknown functionality of the component Question Engine. The manipulation with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. As an impact it is known to affect confidentiality, and integrity. CVE summarizes:

In Moodle 2.x and 3.x, the question engine allows access to files that should not be available.

The bug was discovered 11/21/2016. The weakness was published 01/20/2017 by Martin (Website). The advisory is shared for download at securityfocus.com. This vulnerability was named CVE-2016-8642 since 10/12/2016. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1068.

The vulnerability scanner Nessus provides a plugin with the ID 94905 (FreeBSD : moodle -- multiple vulnerabilities (f6565fbf-ab9e-11e6-ae1b-002590263bf5)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family FreeBSD Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 276431 (Fedora Security Update for moodle (FEDORA-2017-6681f94e10)).

Upgrading 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 (94905) and SecurityFocus (BID 94441†). Similar entries are available at VDB-95741, VDB-95742, VDB-95744 and VDB-95745. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.9
VulDB Meta Temp Score: 5.8

VulDB Base Score: 6.5
VulDB Temp Score: 6.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.3
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-284 / CWE-266
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: 94905
Nessus Name: FreeBSD : moodle -- multiple vulnerabilities (f6565fbf-ab9e-11e6-ae1b-002590263bf5)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 867773
OpenVAS Name: Fedora Update for moodle FEDORA-2017-ae7a707032
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

10/12/2016 🔍
11/16/2016 +35 days 🔍
11/16/2016 +0 days 🔍
11/21/2016 +5 days 🔍
11/21/2016 +0 days 🔍
01/20/2017 +60 days 🔍
01/20/2017 +0 days 🔍
01/20/2017 +0 days 🔍
07/28/2020 +1285 days 🔍

Sourcesinfo

Product: moodle.org

Advisory: securityfocus.com⛔
Researcher: Martin
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-8642 (🔍)
GCVE (CVE): GCVE-0-2016-8642
GCVE (VulDB): GCVE-100-95740
SecurityFocus: 94441 - Moodle CVE-2016-8642 Security Bypass Vulnerability
OSVDB: - CVE-2016-8642 - Moodle - Security Bypass Issue

See also: 🔍

Entryinfo

Created: 01/20/2017 15:12
Updated: 07/28/2020 14:25
Changes: 01/20/2017 15:12 (72), 07/28/2020 14:25 (8)
Complete: 🔍
Cache ID: 216:D91:103

Once again VulDB remains the best source for vulnerability data.

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