Vulnerability Name:

CVE-2021-28166 (CCN-199618)

Assigned:2021-04-07
Published:2021-04-07
Updated:2021-04-13
Summary:In Eclipse Mosquitto version 2.0.0 to 2.0.9, if an authenticated client that had connected with MQTT v5 sent a crafted CONNACK message to the broker, a NULL pointer dereference would occur.
CVSS v3 Severity:6.5 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
5.7 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/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): None
Integrity (I): None
Availibility (A): High
6.5 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
5.7 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/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): None
Integrity (I): None
Availibility (A): High
CVSS v2 Severity:4.0 Medium (CVSS v2 Vector: AV:N/AC:L/Au:S/C:N/I:N/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Partial
6.8 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:S/C:N/I:N/A:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Complete
Vulnerability Type:CWE-476
CWE-476
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2021-28166

Source: CCN
Type: Bugzilla - Bug 572608
(CVE-2021-28166) - Mosquitto: CVE request - NULL pointer dereference on crafted CONNACK

Source: CONFIRM
Type: Issue Tracking, Patch, Vendor Advisory
https://bugs.eclipse.org/bugs/show_bug.cgi?id=572608

Source: XF
Type: UNKNOWN
eclipse-cve202128166-dos(199618)

Source: CCN
Type: mosquitto GIT Repository
Eclipse Mosquitto

Vulnerable Configuration:Configuration 1:
  • cpe:/a:eclipse:mosquitto:*:*:*:*:*:*:*:* (Version >= 2.0.0 and <= 2.0.9)

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:org.opensuse.security:def:112700
    P
    		libmosquitto1-2.0.11-1.2 on GA media (Moderate)
    2022-01-17
    oval:org.opensuse.security:def:106176
    P
    		libmosquitto1-2.0.11-1.2 on GA media (Moderate)
    2021-10-01
    BACK
    eclipse mosquitto *