Vulnerability CVE-2019-3850

Vulnerability Name:

CVE-2019-3850 (CCN-159480)

Assigned:

2019-03-19

Published:

2019-03-19

Updated:

2019-10-09

Summary:

A vulnerability was found in moodle before versions 3.6.3, 3.5.5, 3.4.8 and 3.1.17. Links within assignment submission comments would open directly (in the same window). Although links themselves may be valid, opening within the same window and without the no-referrer header policy made them more susceptible to exploits.

CVSS v3 Severity:

6.1 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N)
5.3 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/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): Required
Scope:	Scope (S): Changed
Impact Metrics:	Confidentiality (C): Low Integrity (I): Low Availibility (A): None

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

CVSS v2 Severity:

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

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

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-601

Vulnerability Consequences:

Gain Access

References:

Source: MITRE
Type: CNA
CVE-2019-3850

Source: CONFIRM
Type: Issue Tracking, Patch, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3850

Source: XF
Type: UNKNOWN
moodle-cve20193850-weak-security(159480)

Source: CCN
Type: Moodle Security Advisory MSA-19-0007
Stored HTML in assignment submission comments allowed links to be opened directly

Source: MISC
Type: Patch, Vendor Advisory
https://moodle.org/mod/forum/discuss.php?d=384013#p1547745

Vulnerable Configuration:

Configuration 1:

cpe:/a:moodle:moodle:*:*:*:*:*:*:*:* (Version < 3.1.17)

OR cpe:/a:moodle:moodle:*:*:*:*:*:*:*:* (Version >= 3.4.0 and < 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:3.1.0:-:*:*:*:*:*:*

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

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

OR cpe:/a:moodle:moodle:3.1.16:*:*:*:*:*:*:*

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.disco:def:201938500000000	V	CVE-2019-3850 on Ubuntu 19.04 (disco) - medium.	2019-03-26
oval:com.ubuntu.bionic:def:20193850000	V	CVE-2019-3850 on Ubuntu 18.04 LTS (bionic) - medium.	2019-03-26
oval:com.ubuntu.cosmic:def:201938500000000	V	CVE-2019-3850 on Ubuntu 18.10 (cosmic) - medium.	2019-03-26
oval:com.ubuntu.cosmic:def:20193850000	V	CVE-2019-3850 on Ubuntu 18.10 (cosmic) - medium.	2019-03-26
oval:com.ubuntu.bionic:def:201938500000000	V	CVE-2019-3850 on Ubuntu 18.04 LTS (bionic) - medium.	2019-03-26
oval:com.ubuntu.trusty:def:20193850000	V	CVE-2019-3850 on Ubuntu 14.04 LTS (trusty) - medium.	2019-03-26
oval:com.ubuntu.xenial:def:201938500000000	V	CVE-2019-3850 on Ubuntu 16.04 LTS (xenial) - medium.	2019-03-26
oval:com.ubuntu.xenial:def:20193850000	V	CVE-2019-3850 on Ubuntu 16.04 LTS (xenial) - medium.	2019-03-26

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