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cnvdChina National Vulnerability DatabaseCNVD-2021-65651
HistoryAug 26, 2021 - 12:00 a.m.

F5 BIG-IP DNS denial-of-service vulnerability

2021-08-2600:00:00
China National Vulnerability Database
www.cnvd.org.cn
7

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

4.3 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:M/Au:N/C:N/I:N/A:P

F5 BIG-IP is an application delivery platform from F5 that integrates network traffic orchestration, load balancing, intelligent DNS, remote access policy management, etc. A denial of service vulnerability exists in F5 BIG-IP DNS, which stems from the fact that when the BIG-IP DNS system is configured with non-default wide IP and pool settings, an undisclosed DNS response may cause TMM to terminate. When the TMM process is restarted, traffic is interrupted. An attacker could use this vulnerability to cause a denial of service (DoS) on the BIG-IP system.

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

4.3 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:M/Au:N/C:N/I:N/A:P

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