PT-2020-16783 · F5 · Big-Ip Ltm+1

Published 2020-12-24 · Updated 2020-12-28 · CVE-2020-27721

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions BIG-IP DNS versions 11.6.1 through 11.6.5.2 BIG-IP DNS versions 12.1.0 through 12.1.5.2 BIG-IP DNS versions 13.1.0 through 13.1.3.5 BIG-IP DNS versions 14.1.0 through 14.1.3 BIG-IP DNS versions 15.1.0 through 15.1.1 BIG-IP DNS versions 16.0.0 through 16.0.0.1

Description In a BIG-IP DNS / BIG-IP LTM GSLB deployment, under certain circumstances, the BIG-IP DNS system may stop using a BIG-IP LTM virtual server for DNS response.

Recommendations For versions 11.6.1 through 11.6.5.2, update to a fixed version to resolve the issue. For versions 12.1.0 through 12.1.5.2, update to a fixed version to resolve the issue. For versions 13.1.0 through 13.1.3.5, update to a fixed version to resolve the issue. For versions 14.1.0 through 14.1.3, update to a fixed version to resolve the issue. For versions 15.1.0 through 15.1.1, update to a fixed version to resolve the issue. For versions 16.0.0 through 16.0.0.1, update to a fixed version to resolve the issue. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Related Identifiers

CVE-2020-27721

Affected Products

Big-Ip Dns

Big-Ip Ltm

References · 4

• https://support.f5.com/csp/article/K52035247 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-27721 · Security Note
• https://osv.dev/vulnerability/CVE-2020-27721 · Vendor Advisory
• https://t.me/cibsecurity/21279 · Telegram Post