Memory Consumption Issue in F5 BIG-IP APM Due to OCSP Verification
CVE-2021-23047

5.3MEDIUM

Key Information:

Vendor

F5
Status
Big-ip Apm
Vendor
CVE Published:
14 September 2021

What is CVE-2021-23047?

In certain versions of F5 BIG-IP APM—specifically, versions 16.x prior to 16.1.0, 15.1.x before 15.1.3.1, and various other legacy releases—an issue arises during the Online Certificate Status Protocol (OCSP) verification process. If a certificate includes Authority Information Access (AIA), certain undisclosed requests can lead to a significant increase in memory usage. It is crucial to note that software versions which have reached End of Technical Support (EoTS) are not included in the evaluation.

Affected Version(s)

BIG-IP APM 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

References

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

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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