PT-2021-15353 · F5 · F5 Big-Ip Apm

Published 2021-09-14 · Updated 2021-09-24 · CVE-2021-23028

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 F5 BIG-IP ASM versions 13.1.x through 13.1.4 F5 BIG-IP ASM versions 14.1.x through 14.1.4.2 F5 BIG-IP ASM versions 15.1.x through 15.1.3.1 F5 BIG-IP ASM versions 16.0.x through 16.0.1.2

Description When JSON content profiles are configured for URLs as part of an F5 Advanced Web Application Firewall (WAF)/BIG-IP ASM security policy and applied to a virtual server, undisclosed requests may cause the BIG-IP ASM bd process to terminate.

Recommendations For versions 13.1.x through 13.1.4, update to a version after 13.1.4 to resolve the issue. For versions 14.1.x through 14.1.4.2, update to a version after 14.1.4.2 to resolve the issue. For versions 15.1.x through 15.1.3.1, update to a version after 15.1.3.1 to resolve the issue. For versions 16.0.x through 16.0.1.2, update to a version after 16.0.1.2 to resolve the issue. As a temporary workaround, consider restricting the use of JSON content profiles for URLs in the F5 Advanced Web Application Firewall (WAF)/BIG-IP ASM security policy until a patch is available.

Fix

RCE

Weakness Enumeration

CWE-20

Related Identifiers

CVE-2021-23028

Affected Products

F5 Big-Ip Apm

References · 6

• https://nvd.nist.gov/vuln/detail/CVE-2021-23028 · Security Note
• https://support.f5.com/csp/article/K00602225 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-23028 · Vendor Advisory
• https://t.me/cibsecurity/28854 · Telegram Post
• https://t.me/cvenotify/20877 · Telegram Post
• https://t.me/cvenotify/20863 · Telegram Post