Vulnerability CVE-2019-3849

Vulnerability Name:

CVE-2019-3849 (CCN-159479)

Assigned:

2019-03-19

Published:

2019-03-19

Updated:

2020-10-16

Summary:

A vulnerability was found in moodle before versions 3.6.3, 3.5.5 and 3.4.8. Users could assign themselves an escalated role within courses or content accessed via LTI, by modifying the request to the LTI publisher site.

CVSS v3 Severity:

8.8 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
7.7 High (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/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): Low Privileges Required (PR): Low User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): High Integrity (I): High Availibility (A): High

6.3 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L)
5.5 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/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): Low Availibility (A): Low

CVSS v2 Severity:

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

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Low Authentication (Au): Single_Instance
Impact Metrics:	Confidentiality (C): Partial Integrity (I): Partial Availibility (A): Partial

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

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Low Athentication (Au): Single_Instance
Impact Metrics:	Confidentiality (C): Partial Integrity (I): Partial Availibility (A): Partial

Vulnerability Type:

CWE-269
CWE-285

Vulnerability Consequences:

Gain Privileges

References:

Source: MITRE
Type: CNA
CVE-2019-3849

Source: CONFIRM
Type: Issue Tracking, Patch, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3849

Source: XF
Type: UNKNOWN
moodle-cve20193849-priv-esc(159479)

Source: CCN
Type: Moodle Security Advisory MSA-19-0006
Users could elevate their role when accessing the LTI tool on a provider site

Source: MISC
Type: Patch, Vendor Advisory
https://moodle.org/mod/forum/discuss.php?d=384012#p1547744

Vulnerable Configuration:

Configuration 1:

cpe:/a:moodle:moodle:*:*:*:*:*:*:*:* (Version < 3.4.8)

OR cpe:/a:moodle:moodle:*:*:*:*:*:*:*:* (Version >= 3.5.0 and < 3.5.5)

OR cpe:/a:moodle:moodle:*:*:*:*:*:*:*:* (Version >= 3.6.0 and < 3.6.3)

Configuration CCN 1:

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

OR cpe:/a:moodle:moodle:3.5.0:*:*:*:*:*:*:*

OR cpe:/a:moodle:moodle:3.4.7:*:*:*:*:*:*:*

OR cpe:/a:moodle:moodle:3.5.4:*:*:*:*:*:*:*

OR cpe:/a:moodle:moodle:3.6.2:*:*:*:*:*:*:*

Denotes that component is vulnerable

Oval Definitions

Definition ID	Class	Title	Last Modified
oval:com.ubuntu.bionic:def:20193849000	V	CVE-2019-3849 on Ubuntu 18.04 LTS (bionic) - medium.	2019-03-26
oval:com.ubuntu.cosmic:def:201938490000000	V	CVE-2019-3849 on Ubuntu 18.10 (cosmic) - medium.	2019-03-26
oval:com.ubuntu.cosmic:def:20193849000	V	CVE-2019-3849 on Ubuntu 18.10 (cosmic) - medium.	2019-03-26
oval:com.ubuntu.bionic:def:201938490000000	V	CVE-2019-3849 on Ubuntu 18.04 LTS (bionic) - medium.	2019-03-26
oval:com.ubuntu.trusty:def:20193849000	V	CVE-2019-3849 on Ubuntu 14.04 LTS (trusty) - medium.	2019-03-26
oval:com.ubuntu.xenial:def:201938490000000	V	CVE-2019-3849 on Ubuntu 16.04 LTS (xenial) - medium.	2019-03-26
oval:com.ubuntu.xenial:def:20193849000	V	CVE-2019-3849 on Ubuntu 16.04 LTS (xenial) - medium.	2019-03-26

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