Vulnerability CVE-2021-40694

Vulnerability Name:

CVE-2021-40694 (CCN-218015)

Assigned:

2021-09-08

Published:

2022-01-21

Updated:

2022-10-03

Summary:

Insufficient escaping of the LaTeX preamble made it possible for site administrators to read files available to the HTTP server system account.

CVSS v3 Severity:

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

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

CVSS v2 Severity:

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

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

Vulnerability Type:

CWE-116

Vulnerability Consequences:

Obtain Information

References:

Source: MITRE
Type: CNA
CVE-2021-40694

Source: CCN
Type: Red Hat Bugzilla - Bug 2043421
(CVE-2021-40694) - CVE-2021-40694 moodle: arbitrary file read by site administrators via LaTeX preamble

Source: MISC
Type: Issue Tracking, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2043421

Source: XF
Type: UNKNOWN
moodle-cve202140694-info-disc(218015)

Source: CCN
Type: moodle Web site
MSA-21-0035: Arbitrary file read by site administrators via LaTeX preamble

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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