Vulnerability CVE-2019-3809

Vulnerability Name:

CVE-2019-3809 (CCN-159568)

Assigned:

2019-01-21

Published:

2019-01-21

Updated:

2019-10-09

Summary:

A flaw was found in Moodle versions 3.1 to 3.1.15 and earlier unsupported versions. The mybackpack functionality allowed setting the URL of badges, when it should be restricted to the Mozilla Open Badges backpack URL. This resulted in the possibility of blind SSRF via requests made by the page.

CVSS v3 Severity:

10.0 Critical (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H)
8.7 High (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/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): None User Interaction (UI): None
Scope:	Scope (S): Changed
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:L/I:N/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:L/I:N/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): Low Integrity (I): None Availibility (A): None

CVSS v2 Severity:

7.5 High (CVSS v2 Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Low 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:P/I:N/A:N)

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

Vulnerability Type:

CWE-918

Vulnerability Consequences:

Gain Access

References:

Source: MITRE
Type: CNA
CVE-2019-3809

Source: CONFIRM
Type: Patch, Vendor Advisory
http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-64222

Source: CONFIRM
Type: Issue Tracking, Patch, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3809

Source: XF
Type: UNKNOWN
moodle-cve20193809-ssrf(159568)

Source: CCN
Type: Moodle Security Advisory MSA-19-0002
Blind SSRF Risk in /badges/mybackpack.php

Source: CONFIRM
Type: Patch, Vendor Advisory
https://moodle.org/mod/forum/discuss.php?d=381229#p1536766

Vulnerable Configuration:

Configuration 1:

cpe:/a:moodle:moodle:*:*:*:*:*:*:*:* (Version >= 3.1.0 and <= 3.1.15)

Configuration CCN 1:

cpe:/a:moodle:moodle:3.1.2:*:*:*:*:*:*:*

OR cpe:/a:moodle:moodle:3.1.3:*:*:*:*:*:*:*

OR cpe:/a:moodle:moodle:3.1.1:*:*:*:*:*:*:*

OR cpe:/a:moodle:moodle:3.1.4:*:*:*:*:*:*:*

OR cpe:/a:moodle:moodle:3.1.5:*:*:*:*:*:*:*

OR cpe:/a:moodle:moodle:3.1.6:*:*:*:*:*:*:*

OR cpe:/a:moodle:moodle:3.1.7:*:*:*:*:*:*:*

OR cpe:/a:moodle:moodle:3.1.8:*:*:*:*:*:*:*

OR cpe:/a:moodle:moodle:3.1.9:*:*:*:*:*:*:*

OR cpe:/a:moodle:moodle:3.1.10:*:*:*:*:*:*:*

OR cpe:/a:moodle:moodle:3.1.11:*:*:*:*:*:*:*

OR cpe:/a:moodle:moodle:3.1.12:*:*:*:*:*:*:*

OR cpe:/a:moodle:moodle:3.1.13:*:*:*:*:*:*:*

OR cpe:/a:moodle:moodle:3.1.14:*:*:*:*:*:*:*

OR cpe:/a:moodle:moodle:3.1.15:*:*:*:*:*:*:*

Denotes that component is vulnerable

Oval Definitions

Definition ID	Class	Title	Last Modified
oval:com.ubuntu.disco:def:201938090000000	V	CVE-2019-3809 on Ubuntu 19.04 (disco) - medium.	2019-03-25
oval:com.ubuntu.bionic:def:20193809000	V	CVE-2019-3809 on Ubuntu 18.04 LTS (bionic) - medium.	2019-03-25
oval:com.ubuntu.cosmic:def:201938090000000	V	CVE-2019-3809 on Ubuntu 18.10 (cosmic) - medium.	2019-03-25
oval:com.ubuntu.cosmic:def:20193809000	V	CVE-2019-3809 on Ubuntu 18.10 (cosmic) - medium.	2019-03-25
oval:com.ubuntu.bionic:def:201938090000000	V	CVE-2019-3809 on Ubuntu 18.04 LTS (bionic) - medium.	2019-03-25
oval:com.ubuntu.trusty:def:20193809000	V	CVE-2019-3809 on Ubuntu 14.04 LTS (trusty) - medium.	2019-03-25
oval:com.ubuntu.xenial:def:201938090000000	V	CVE-2019-3809 on Ubuntu 16.04 LTS (xenial) - medium.	2019-03-25
oval:com.ubuntu.xenial:def:20193809000	V	CVE-2019-3809 on Ubuntu 16.04 LTS (xenial) - medium.	2019-03-25

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