#VU103690 Resource exhaustion in BIG-IP - CVE-2025-21087

Vulnerability identifier: #VU103690

Vulnerability risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2025-21087

CWE-ID: CWE-400

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
BIG-IP
Hardware solutions / Firmware

Vendor: F5 Networks

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to application does not properly control consumption of internal resources when Client SSL or Server SSL profiles are configured on a virtual server. A remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

BIG-IP: 15.0.0 - 15.0.1.4, 15.1.0 - 15.1.10.6.0.11, 16.0.0 - 16.0.1.2, 16.1.0 - 16.1.5, 17.0.0 - 17.0.0.2, 17.1.0 - 17.1.1.4

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External links
https://my.f5.com/manage/s/article/K000134888

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.