Vulnerability Name:

CVE-2015-5331 (CCN-110888)

Assigned:2015-11-16
Published:2015-11-16
Updated:2020-12-01
Summary:Moodle 2.9.x before 2.9.3 does not properly check the contact list before authorizing message transmission, which allows remote authenticated users to bypass intended access restrictions and conduct spam attacks via the messaging API.
CVSS v3 Severity:4.3 Medium (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 (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
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 (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
Authentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): None
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-254
Vulnerability Consequences:Bypass Security
References:Source: MITRE
Type: CNA
CVE-2015-5331

Source: CONFIRM
Type: UNKNOWN
http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-50426

Source: XF
Type: UNKNOWN
moodle-cve20155331-sec-bypass(110888)

Source: CCN
Type: Moodle Security Advisory MSA-15-0037
Possible to send a message to a user who blocked messages from non contacts

Source: CONFIRM
Type: Vendor Advisory
https://moodle.org/mod/forum/discuss.php?d=323228

Source: CCN
Type: WhiteSource Vulnerability Database
CVE-2015-5331

Vulnerable Configuration:Configuration 1:
  • cpe:/a:moodle:moodle:2.9.2:*:*:*:*:*:*:*
  • OR cpe:/a:moodle:moodle:2.9.1:*:*:*:*:*:*:*
  • OR cpe:/a:moodle:moodle:2.9.0:*:*:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/a:moodle:moodle:2.9.2:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:com.ubuntu.precise:def:20155331000
    V
    		CVE-2015-5331 on Ubuntu 12.04 LTS (precise) - medium.
    2016-02-22
    oval:com.ubuntu.trusty:def:20155331000
    V
    		CVE-2015-5331 on Ubuntu 14.04 LTS (trusty) - medium.
    2016-02-22
    BACK
    moodle moodle 2.9.2
    moodle moodle 2.9.1
    moodle moodle 2.9.0
    moodle moodle 2.9.2