CVE-2020-8616

Severity CVSS v4.0:

Pending analysis

Type:

CWE-400 Uncontrolled Resource Consumption ('Resource Exhaustion')

Publication date:

19/05/2020

Last modified:

07/11/2023

Description

A malicious actor who intentionally exploits this lack of effective limitation on the number of fetches performed when processing referrals can, through the use of specially crafted referrals, cause a recursing server to issue a very large number of fetches in an attempt to process the referral. This has at least two potential effects: The performance of the recursing server can potentially be degraded by the additional work required to perform these fetches, and The attacker can exploit this behavior to use the recursing server as a reflector in a reflection attack with a high amplification factor.

Impact

Vector 3.x

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

Base Score: 8.60 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

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

Base Score 3.x

8.60

Severity 3.x

HIGH

Vector 2.0

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

Base Score: 5.00 MEDIUM
Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P

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

Base Score 2.0

5.00

Severity 2.0

MEDIUM

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:a:isc:bind::::::::	9.0.0 (including)	9.11.18 (including)
cpe:2.3:a:isc:bind::::::::	9.12.0 (including)	9.12.4 (including)
cpe:2.3:a:isc:bind::::::::	9.13.0 (including)	9.13.7 (including)
cpe:2.3:a:isc:bind::::::::	9.14.0 (including)	9.14.11 (including)
cpe:2.3:a:isc:bind::::::::	9.15.0 (including)	9.15.6 (including)
cpe:2.3:a:isc:bind::::::::	9.16.0 (including)	9.16.2 (including)
cpe:2.3:a:isc:bind::::::::	9.17.0 (including)	9.17.1 (including)
cpe:2.3:a:isc:bind:9.12.4:p1::::::
cpe:2.3:a:isc:bind:9.12.4:p2::::::
cpe:2.3:a:isc:bind:9.9.3:s1:::supported_preview:::*
cpe:2.3:a:isc:bind:9.10.5:s1:::supported_preview:::*
cpe:2.3:a:isc:bind:9.10.7:s1:::supported_preview:::*
cpe:2.3:a:isc:bind:9.11.3:s1:::supported_preview:::*
cpe:2.3:a:isc:bind:9.11.5:s3:::supported_preview:::*
cpe:2.3:a:isc:bind:9.11.5:s5:::supported_preview:::*

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

CVE-2020-8616

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools