CVE-2021-23047

MEDIUM

5.3

CVSS Score

Published: September 14, 2021 at 01:26 PM UTC

Updated: June 17, 2026 at 03:38 AM UTC

1 product affected across 1 vendorBig IP Access Policy Manager

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Severity

MEDIUM5.3

Exploit prediction

EPSS 0.6%

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Big IP Access Policy Manager · F5

95%

11.6.1 ≤ v ≤ 11.6.512.1.0 ≤ v ≤ 12.1.613.1.0 ≤ v < 13.1.414.1.0 ≤ v < 14.1.4.315.1.0 ≤ v < 15.1.3.116 ≤ v < 16.1.016.0.0 ≤ v ≤ 16.0.1

Affected range stops below 13.1.4, so it looks safe — our inference, not a vendor statement

Affected range stops below 14.1.4.3, so it looks safe — our inference, not a vendor statement

Affected range stops below 15.1.3.1, so it looks safe — our inference, not a vendor statement

Affected range stops below 16.1.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://support.f5.com/csp/article/K79428827

References (1)

x_refsource_MISCVendor Advisory

Source: [email protected]

https://support.f5.com/csp/article/K79428827

CVSS

5.3MEDIUM[email protected]

Attack Vector: NETWORK
Complexity: LOW
Privileges: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: NONE
Integrity: NONE
Availability: LOW

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-400

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