PT-2021-15336 · F5 · Big-Ip

Published 2021-05-10 · Updated 2021-05-21 · CVE-2021-23009

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 versions 15.1.x through 15.1.2 BIG-IP versions 16.0.x through 16.0.0

Description The issue is caused by malformed HTTP/2 requests, which may lead to an infinite loop resulting in a Denial of Service for Data Plane traffic. This is a data plane issue only, with no control plane exposure. When the TMM process is aborted, it takes the configured HA action.

Recommendations For BIG-IP versions 15.1.x through 15.1.2, update to version 15.1.3 or later. For BIG-IP versions 16.0.x through 16.0.0, update to version 16.0.1.1 or later.

Fix

Infinite Loop

Weakness Enumeration

CWE-835

Related Identifiers

CVE-2021-23009

Affected Products

Big-Ip

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2021-23009 · Security Note
• https://support.f5.com/csp/article/K90603426 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-23009 · Vendor Advisory