Increased Resource Utilization in F5's Virtual Server and DNSSEC Operations
CVE-2025-21087

8.9HIGH

Key Information:

Vendor

F5
Status
Big-ip
Big-ip Next
Vendor
CVE Published:
5 February 2025

What is CVE-2025-21087?

A vulnerability exists in F5's BIG-IP product when Client or Server SSL profiles are configured on a Virtual Server, or during DNSSEC signing operations. Undisclosed traffic may lead to an unexpected increase in memory and CPU utilization, impacting performance and potentially resulting in service disruption.

Affected Version(s)

BIG-IP 17.1.0 < 17.1.2

BIG-IP 16.1.0

BIG-IP 15.1.0

References

https://my.f5.com/manage/s/article/K000134888
vendor-advisory

CVSS V4

Score:
8.9
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

F5
.
CVE-2025-21087 : Increased Resource Utilization in F5's Virtual Server and DNSSEC Operations