Vulnerability CVE-2018-1082

Vulnerability Name:

CVE-2018-1082 (CCN-141543)

Assigned:

2017-12-04

Published:

2018-03-26

Updated:

2019-10-09

Summary:

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.

CVSS v3 Severity:

8.1 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H)
7.1 High (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C)

Exploitability Metrics:	Attack Vector (AV): Network Attack Complexity (AC): High Privileges Required (PR): None User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): High Integrity (I): High Availibility (A): High

5.3 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N)
4.6 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C)

Exploitability Metrics:	Attack Vector (AV): Network Attack Complexity (AC): Low Privileges Required (PR): None User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): None Integrity (I): Low Availibility (A): None

CVSS v2 Severity:

6.8 Medium (CVSS v2 Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Medium Authentication (Au): None
Impact Metrics:	Confidentiality (C): Partial Integrity (I): Partial Availibility (A): Partial

5.0 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:P/A:N)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Low Athentication (Au): None
Impact Metrics:	Confidentiality (C): None Integrity (I): Partial Availibility (A): None

Vulnerability Type:

CWE-287

Vulnerability Consequences:

Bypass Security

References:

Source: MITRE
Type: CNA
CVE-2018-1082

Source: CONFIRM
Type: Patch
http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-60101

Source: BID
Type: Third Party Advisory, VDB Entry
103725

Source: CCN
Type: BID-103725
Moodle CVE-2018-1082 Authentication Bypass Vulnerability

Source: XF
Type: UNKNOWN
moodle-cve20181082-sec-bypass(141543)

Source: CCN
Type: Moodle Security Advisory MSA-18-0006
Suspended users with OAuth 2 authentication method can still log in to the site

Source: CONFIRM
Type: Vendor Advisory
https://moodle.org/mod/forum/discuss.php?d=367939

Vulnerable Configuration:

Configuration 1:

cpe:/a:moodle:moodle:*:*:*:*:*:*:*:* (Version >= 3.3.0 and <= 3.3.4)

OR cpe:/a:moodle:moodle:*:*:*:*:*:*:*:* (Version >= 3.4.0 and <= 3.4.1)

Configuration CCN 1:

cpe:/a:moodle:moodle:3.3.0:*:*:*:*:*:*:*

OR cpe:/a:moodle:moodle:3.4.0:-:*:*:*:*:*:*

OR cpe:/a:moodle:moodle:3.3.4:*:*:*:*:*:*:*

OR cpe:/a:moodle:moodle:3.4.1:*:*:*:*:*:*:*

Denotes that component is vulnerable

Oval Definitions

Definition ID	Class	Title	Last Modified
oval:com.ubuntu.xenial:def:201810820000000	V	CVE-2018-1082 on Ubuntu 16.04 LTS (xenial) - untriaged.	2018-04-04
oval:com.ubuntu.artful:def:20181082000	V	CVE-2018-1082 on Ubuntu 17.10 (artful) - untriaged.	2018-04-04
oval:com.ubuntu.xenial:def:20181082000	V	CVE-2018-1082 on Ubuntu 16.04 LTS (xenial) - untriaged.	2018-04-04
oval:com.ubuntu.disco:def:201810820000000	V	CVE-2018-1082 on Ubuntu 19.04 (disco) - untriaged.	2018-04-04
oval:com.ubuntu.bionic:def:20181082000	V	CVE-2018-1082 on Ubuntu 18.04 LTS (bionic) - untriaged.	2018-04-04
oval:com.ubuntu.cosmic:def:201810820000000	V	CVE-2018-1082 on Ubuntu 18.10 (cosmic) - untriaged.	2018-04-04
oval:com.ubuntu.cosmic:def:20181082000	V	CVE-2018-1082 on Ubuntu 18.10 (cosmic) - untriaged.	2018-04-04
oval:com.ubuntu.bionic:def:201810820000000	V	CVE-2018-1082 on Ubuntu 18.04 LTS (bionic) - untriaged.	2018-04-04
oval:com.ubuntu.trusty:def:20181082000	V	CVE-2018-1082 on Ubuntu 14.04 LTS (trusty) - untriaged.	2018-04-04

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