What is CVE-2021-23008?

CVE-2021-23008 is a critical-severity vulnerability in F5 Big-ip_access_policy_manager, classified under Improper Authentication. CVSS score: 9.8/10. Published 2021-05-10.

How severe is CVE-2021-23008?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2021-23008 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Auth bypass in F5 Big-ip_access_policy_manager

CVE-2021-23008

On version 15.1.x before 15.1.3, 14.1.x before 14.1.4, 13.1.x before 13.1.4, 12.1.x before 12.1.6, and all versions of 16.0.x and 11.6.x., BIG-IP APM AD (Active Directory) authentication can be bypassed via a spoofed AS-REP (Kerberos Authe…

Vulnerability class: Broken Authentication

EPSS: 0.013 (67.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

F5 Big-ip_access_policy_manager
N/a Big-ip Apm — versions 15.1.x before 15.1.3, 14.1.x before 14.1.4, 13.1.x before 13.1.4, 12.1.x before 12.1.6, and all versions of 16.0.x and 11.6.x.

Weakness classification (CWE)

CWE-287 — Improper Authentication

Public proof-of-concept exploits

r0eXpeR/supplier

References

f5sirt@f5.com (x_refsource_MISC, Vendor Advisory)

Frequently asked questions

What is CVE-2021-23008?: CVE-2021-23008 is a critical-severity vulnerability in F5 Big-ip_access_policy_manager, classified under Improper Authentication. CVSS score: 9.8/10. Published 2021-05-10.
How severe is CVE-2021-23008?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2021-23008 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.