CVE-2021-3716

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

02/03/2022

Last modified:

07/07/2023

Description

A flaw was found in nbdkit due to to improperly caching plaintext state across the STARTTLS encryption boundary. A MitM attacker could use this flaw to inject a plaintext NBD_OPT_STRUCTURED_REPLY before proxying everything else a client sends to the server, potentially leading the client to terminate the NBD session. The highest threat from this vulnerability is to system availability.

Impact

Vector 3.x

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L CVSS v3.1 Severity and Metrics:

Base Score: 3.10 LOW
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L

Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): Low

Base Score 3.x

3.10

Severity 3.x

LOW

Vector 2.0

AV:N/AC:M/Au:S/C:N/I:N/A:P CVSS v2.0 Severity and Metrics:

Base Score: 3.50 LOW
Vector: AV:N/AC:M/Au:S/C:N/I:N/A:P

Attack Vector (AV): Network
Attack Complexity (AC): Medium
Authentication (Au): Single
Confidentiality (C): None
Integrity (I): None
Availability (A): Physical

Base Score 2.0

3.50

Severity 2.0

LOW

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:a:nbdkit_project:nbdkit::::::::	1.11.8 (including)	1.24.6 (excluding)
cpe:2.3:a:nbdkit_project:nbdkit::::::::	1.25.1 (including)	1.26.5 (excluding)
cpe:2.3:a:nbdkit_project:nbdkit::::::::	1.27.1 (including)	1.27.6 (excluding)
cpe:2.3:o:redhat:enterprise_linux:8.0::::-:::
cpe:2.3:o:redhat:enterprise_linux:8.0::::advanced_virtualization:::

To consult the complete list of CPE names with products and versions, see this page

CVE-2021-3716

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools