VDB-319941 · CVE-2025-54500 · K000152001

F5 BIG-IP HTTP/2 allocation of resources

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6.0	$0-$5k	0.00

Summaryinfo

A vulnerability classified as problematic has been found in F5 BIG-IP, BIG-IP Next, BIG-IP Next SPK, BIG-IP Next CNF and BIG-IP Next for Kubernetes. The affected element is an unknown function of the component HTTP2 Handler. Performing a manipulation results in allocation of resources. This vulnerability is identified as CVE-2025-54500. The attack can be initiated remotely. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in F5 BIG-IP, BIG-IP Next, BIG-IP Next SPK, BIG-IP Next CNF and BIG-IP Next for Kubernetes. This affects some unknown processing of the component HTTP2 Handler. The manipulation with an unknown input leads to a allocation of resources vulnerability. CWE is classifying the issue as CWE-770. The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor. This is going to have an impact on availability. The summary by CVE is:

An HTTP/2 implementation flaw allows a denial-of-service (DoS) that uses malformed HTTP/2 control frames in order to break the max concurrent streams limit (HTTP/2 MadeYouReset Attack). Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

The advisory is shared at my.f5.com. This vulnerability is uniquely identified as CVE-2025-54500 since 07/29/2025. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1499 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 249249 (F5 Networks BIG-IP : HTTP/2 vulnerability (K000152001)), which helps to determine the existence of the flaw in a target environment.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (249249) and CERT Bund (WID-SEC-2025-1823). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Affected

F5 BIG-IP

Productinfo

Type

Firewall Software

Vendor

Name

License

commercial

Website

Vendor: https://f5.com/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.2

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 5.3
NVD Vector: 🔒

CNA Base Score: 5.3
CNA Vector: 🔒

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Allocation of resources
CWE: CWE-770 / CWE-400 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 249249
Nessus Name: F5 Networks BIG-IP : HTTP/2 vulnerability (K000152001)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Timelineinfo

07/29/2025 CVE reserved
08/13/2025 +15 days Advisory disclosed
08/13/2025 +0 days VulDB entry created
02/04/2026 +175 days VulDB entry last update

Sourcesinfo

Vendor: f5.com

Advisory: K000152001
Status: Confirmed

CVE: CVE-2025-54500 (🔒)
GCVE (CVE): GCVE-0-2025-54500
GCVE (VulDB): GCVE-100-319941
CERT Bund: WID-SEC-2025-1823 - F5 BIG-IP: Mehrere Schwachstellen

Entryinfo

Created: 08/13/2025 17:52
Updated: 02/04/2026 18:53
Changes: 08/13/2025 17:52 (74), 08/15/2025 15:17 (2), 08/17/2025 19:38 (7), 10/22/2025 04:09 (12), 02/04/2026 18:53 (2)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.