Moodle 3.3.4/3.4.1 OAuth2 improper authentication

CVSS Meta Temp Score
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CTI Interest Score
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7.3$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in Moodle 3.3.4/3.4.1. Affected is an unknown function of the component OAuth2. This manipulation causes improper authentication. This vulnerability is tracked as CVE-2018-1082. The attack is possible to be carried out remotely. No exploit exists. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability has been found in Moodle 3.3.4/3.4.1 (Learning Management Software) and classified as critical. Affected by this vulnerability is some unknown processing of the component OAuth2. The manipulation with an unknown input leads to a improper authentication vulnerability. The CWE definition for the vulnerability is CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

A flaw was found in Moodle 3.4 to 3.4.1, and 3.3 to 3.3.4. If a user account using OAuth2 authentication method was once confirmed but later suspended, the user could still login to the site.

The bug was discovered 03/26/2018. The weakness was disclosed 04/04/2018 as confirmed git commit (GIT Repository). It is possible to read the advisory at git.moodle.org. This vulnerability is known as CVE-2018-1082 since 12/04/2017. The attack can be launched remotely. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 5 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 108781 (FreeBSD : moodle -- multiple vulnerabilities (cdb4d962-34f9-11e8-92db-080027907385)), 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.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.moodle.org. 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 (108781) and SecurityFocus (BID 103725†). The entry VDB-115806 is pretty similar. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.7
VulDB Meta Temp Score: 7.5

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

NVD Base Score: 8.1
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: Improper authentication
CWE: CWE-287
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: 108781
Nessus Name: FreeBSD : moodle -- multiple vulnerabilities (cdb4d962-34f9-11e8-92db-080027907385)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 830664
OpenVAS Name: Moodle 3.x Authentication Bypass Vulnerability - Mar18 (Windows)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: git.moodle.org

Timelineinfo

12/04/2017 🔍
03/26/2018 +112 days 🔍
03/26/2018 +0 days 🔍
03/31/2018 +5 days 🔍
04/02/2018 +2 days 🔍
04/04/2018 +2 days 🔍
04/04/2018 +0 days 🔍
04/05/2018 +1 days 🔍
01/22/2020 +657 days 🔍

Sourcesinfo

Product: moodle.org

Advisory: git.moodle.org
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-1082 (🔍)
GCVE (CVE): GCVE-0-2018-1082
GCVE (VulDB): GCVE-100-115807
SecurityFocus: 103725 - Moodle CVE-2018-1082 Authentication Bypass Vulnerability

See also: 🔍

Entryinfo

Created: 04/05/2018 10:30
Updated: 01/22/2020 09:54
Changes: 04/05/2018 10:30 (74), 01/22/2020 09:54 (5)
Complete: 🔍
Cache ID: 216::103

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

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