Vulnerability CVE-2021-40693

Vulnerability Name:

CVE-2021-40693 (CCN-218016)

Assigned:

2021-09-08

Published:

2022-01-21

Updated:

2022-10-03

Summary:

An authentication bypass risk was identified in the external database authentication functionality, due to a type juggling vulnerability.

CVSS v3 Severity:

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

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

4.3 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N)
3.8 Low (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/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): Low User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): None Integrity (I): Low Availibility (A): None

CVSS v2 Severity:

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

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Low Athentication (Au): Single_Instance
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-2021-40693

Source: CCN
Type: Red Hat Bugzilla - Bug 2043417
(CVE-2021-40693) - CVE-2021-40693 moodle: authentication bypass risk when using external database

Source: MISC
Type: Issue Tracking, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2043417

Source: XF
Type: UNKNOWN
moodle-cve202140693-sec-bypass(218016)

Source: CCN
Type: moodle Web site
MSA-21-0034: Authentication bypass risk when using external database authentication

Vulnerable Configuration:

Configuration 1:

cpe:/a:moodle:moodle:*:*:*:*:*:*:*:* (Version >= 3.11.0 and < 3.11.3)

OR cpe:/a:moodle:moodle:*:*:*:*:*:*:*:* (Version >= 3.10.0 and < 3.10.7)

OR cpe:/a:moodle:moodle:*:*:*:*:*:*:*:* (Version < 3.9.10)

Configuration CCN 1:

cpe:/a:moodle:moodle:3.10:*:*:*:*:*:*:*

Denotes that component is vulnerable

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