CVE-2021-23047

Severity Score

5.3

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

On version 16.x before 16.1.0, 15.1.x before 15.1.3.1, 14.1.x before 14.1.4.3, and all versions of 13.1.x, 12.1.x and 11.6.x, when BIG-IP APM performs Online Certificate Status Protocol (OCSP) verification of a certificate that contains Authority Information Access (AIA), undisclosed requests may cause an increase in memory use. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

En versiones 16.x anteriores a 16.1.0, versiones 15.1.x anteriores a 15.1.3.1, versiones 14.1.x anteriores a 14.1.4.3, y todas las versiones de 13.1.x, 12.1.x y 11.6.x, cuando BIG-IP APM lleva a cabo una comprobación del Online Certificate Status Protocol (OCSP) de un certificado que contiene Authority Information Access (AIA), las peticiones no divulgadas pueden causar un aumento del uso de memoria. Nota: Las versiones de software que han alcanzado End of Technical Support (EoTS) no son evaluadas

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

Low

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-01-06 CVE Reserved
2021-09-14 CVE Published
2024-08-03 CVE Updated
2025-04-21 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-400: Uncontrolled Resource Consumption

CAPEC

References (1)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://support.f5.com/csp/article/K79428827	2021-09-27

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
F5 Search vendor "F5"		Big-ip Access Policy Manager Search vendor "F5" for product "Big-ip Access Policy Manager"				>= 11.6.1 <= 11.6.5 Search vendor "F5" for product "Big-ip Access Policy Manager" and version " >= 11.6.1 <= 11.6.5"		-		Affected
F5 Search vendor "F5"		Big-ip Access Policy Manager Search vendor "F5" for product "Big-ip Access Policy Manager"				>= 12.1.0 <= 12.1.6 Search vendor "F5" for product "Big-ip Access Policy Manager" and version " >= 12.1.0 <= 12.1.6"		-		Affected
F5 Search vendor "F5"		Big-ip Access Policy Manager Search vendor "F5" for product "Big-ip Access Policy Manager"				>= 13.1.0 < 13.1.4 Search vendor "F5" for product "Big-ip Access Policy Manager" and version " >= 13.1.0 < 13.1.4"		-		Affected
F5 Search vendor "F5"		Big-ip Access Policy Manager Search vendor "F5" for product "Big-ip Access Policy Manager"				>= 14.1.0 < 14.1.4.3 Search vendor "F5" for product "Big-ip Access Policy Manager" and version " >= 14.1.0 < 14.1.4.3"		-		Affected
F5 Search vendor "F5"		Big-ip Access Policy Manager Search vendor "F5" for product "Big-ip Access Policy Manager"				>= 15.1.0 < 15.1.3.1 Search vendor "F5" for product "Big-ip Access Policy Manager" and version " >= 15.1.0 < 15.1.3.1"		-		Affected
F5 Search vendor "F5"		Big-ip Access Policy Manager Search vendor "F5" for product "Big-ip Access Policy Manager"				>= 16.0.0 <= 16.0.1 Search vendor "F5" for product "Big-ip Access Policy Manager" and version " >= 16.0.0 <= 16.0.1"		-		Affected