Moodle 2.x/3.x Event Monitor information disclosure

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
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CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.1$0-$5k0.00

Summaryinfo

A vulnerability has been found in Moodle 2.x/3.x and classified as problematic. This affects an unknown part of the component Event Monitor. The manipulation leads to information disclosure. This vulnerability is referenced as CVE-2016-5014. Remote exploitation of the attack is possible. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Moodle 2.x/3.x (Learning Management Software). This issue affects an unknown part of the component Event Monitor. The manipulation with an unknown input leads to a information disclosure vulnerability. Using CWE to declare the problem leads to CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. Impacted is confidentiality. The summary by CVE is:

In Moodle 2.x and 3.x, an unenrolled user still receives event monitor notifications even though they can no longer access the course.

The bug was discovered 07/19/2016. The weakness was published 01/20/2017 (Website). It is possible to read the advisory at securityfocus.com. The identification of this vulnerability is CVE-2016-5014 since 05/24/2016. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1592 according to MITRE ATT&CK.

The vulnerability was handled as a non-public zero-day exploit for at least 18 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 92770 (FreeBSD : moodle -- multiple vulnerabilities (3ddcb42b-5b78-11e6-b334-002590263bf5)), 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.

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 (92770) and SecurityFocus (BID 92042†). Similar entries are available at VDB-95733 and VDB-95734. Be aware that VulDB is the high quality 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: 5.3
VulDB Meta Temp Score: 5.2

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.4
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: Information disclosure
CWE: CWE-200 / 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: 92770
Nessus Name: FreeBSD : moodle -- multiple vulnerabilities (3ddcb42b-5b78-11e6-b334-002590263bf5)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

05/24/2016 🔍
07/19/2016 +56 days 🔍
07/19/2016 +0 days 🔍
08/06/2016 +18 days 🔍
08/08/2016 +2 days 🔍
01/20/2017 +165 days 🔍
01/20/2017 +0 days 🔍
01/20/2017 +0 days 🔍
07/28/2020 +1285 days 🔍

Sourcesinfo

Product: moodle.org

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

CVE: CVE-2016-5014 (🔍)
GCVE (CVE): GCVE-0-2016-5014
GCVE (VulDB): GCVE-100-95735
SecurityFocus: 92042 - Moodle CVE-2016-5014 Security Bypass Vulnerability
OSVDB: - CVE-2016-5014 - Moodle - Information Disclosure Issue

See also: 🔍

Entryinfo

Created: 01/20/2017 15:12
Updated: 07/28/2020 12:48
Changes: 01/20/2017 15:12 (65), 07/28/2020 12:48 (8)
Complete: 🔍
Cache ID: 216:CA3:103

Be aware that VulDB is the high quality source for vulnerability data.

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