CVE-2020-8621 Vulnerability Details

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CVE-2020-8621 Metadata Quick Info

CVE Published: 21/08/2020 | CVE Updated: 16/09/2024 | CVE Year: 2020
Source: isc | Vendor: ISC | Product: BIND9
Status : PUBLISHED

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CVE-2020-8621 Description

In BIND 9.14.0 -> 9.16.5, 9.17.0 -> 9.17.3, If a server is configured with both QNAME minimization and \'forward first\' then an attacker who can send queries to it may be able to trigger the condition that will cause the server to crash. Servers that \'forward only\' are not affected.

Metrics

CVSS Version: 3.1 | Base Score: 7.5 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

l➤ Exploitability Metrics:
    Attack Vector (AV)* NETWORK
    Attack Complexity (AC)* LOW
    Privileges Required (PR)* NONE
    User Interaction (UI)* NONE
    Scope (S)* UNCHANGED

l➤ Impact Metrics:
    Confidentiality Impact (C)* NONE
    Integrity Impact (I)* NONE
    Availability Impact (A)* HIGH

Weakness Enumeration (CWE)

CWE-ID:
CWE Name: While query forwarding and QNAME minimization are mutually incompatible, BIND did sometimes allow QNAME minimization when continuing with recursion after forward first did not result in an answer. In these cases the data used by QNAME minimization might be inconsistent, leading to an assertion failure, causing the server to exit. Affects BIND 9.14.0 -> 9.16.5, 9.17.0 -> 9.17.3
Source: ISC

Common Attack Pattern Enumeration and Classification (CAPEC)

CAPEC-ID:
CAPEC Description:


Source: NVD (National Vulnerability Database).