Remote denial of service in F5 BIG-IP HTTP/2 profile

1) Resource exhaustion

EUVDB-ID: #VU108775

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2025-36504

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

Description

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

The vulnerability exists due to system does not properly control consumption of internal resources when BIG-IP HTTP/2 httprouter profile is configured on a virtual server. A remote attacker can send specially crafted HTTP2 requests to the system and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

BIG-IP: 16.1.0 - 20.2.1

BIG-IP Next SPK: 1.7.0 - 1.9.2

BIG-IP Next CNF: 1.1.0 - 1.4.1

CPE2.3

• cpe:2.3:h:f5_networks:big-ip:16.1.0:*:*:*:*:*:*:*
• cpe:2.3:h:f5_networks:big-ip:16.1.1:*:*:*:*:*:*:*
• cpe:2.3:h:f5_networks:big-ip:16.1.2:*:*:*:*:*:*:*
• cpe:2.3:h:f5_networks:big-ip:16.1.2.1:*:*:*:*:*:*:*
• cpe:2.3:h:f5_networks:big-ip:16.1.2.2:*:*:*:*:*:*:*
• cpe:2.3:h:f5_networks:big-ip:16.1.3:*:*:*:*:*:*:*
• cpe:2.3:h:f5_networks:big-ip:16.1.3.1:*:*:*:*:*:*:*
• cpe:2.3:h:f5_networks:big-ip:16.1.3.2:*:*:*:*:*:*:*
• cpe:2.3:h:f5_networks:big-ip:16.1.3.3:*:*:*:*:*:*:*
• cpe:2.3:h:f5_networks:big-ip:16.1.3.4:*:*:*:*:*:*:*
• cpe:2.3:o:f5_networks:big-ip_next_spk:1.7.0:*:*:*:*:*:*:*
• cpe:2.3:o:f5_networks:big-ip_next_cnf:1.1.0:*:*:*:*:*:*:*

External links

https://my.f5.com/manage/s/article/K000140919

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.