VDB-307954 · CVE-2025-41433 · K000140937

F5 BIG-IP SIP ALG Profile null pointer dereference

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.3	$0-$5k	0.00

Summaryinfo

A vulnerability labeled as critical has been found in F5 BIG-IP. This impacts an unknown function of the component SIP ALG Profile. Executing a manipulation can lead to null pointer dereference. The identification of this vulnerability is CVE-2025-41433. The attack may be launched remotely. There is no exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as critical was found in F5 BIG-IP (the affected version unknown). This vulnerability affects an unknown part of the component SIP ALG Profile. The manipulation with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. As an impact it is known to affect availability. CVE summarizes:

When a Session Initiation Protocol (SIP) message routing framework (MRF) application layer gateway (ALG) profile is configured on a Message Routing virtual server, undisclosed requests can cause the Traffic Management Microkernel (TMM) to terminate. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

The advisory is available at my.f5.com. This vulnerability was named CVE-2025-41433 since 04/23/2025. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. The technical details are unknown and an exploit is not available.

The vulnerability scanner Nessus provides a plugin with the ID 235477 (F5 Networks BIG-IP : BIG-IP SIP ALG profile vulnerability (K000140937)), which helps to determine the existence of the flaw in a target environment.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (235477). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

Firewall Software

Vendor

Name

BIG-IP

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: 7.5
VulDB Meta Temp Score: 7.3

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 7.5
CNA Vector: 🔍

CVSSv2info

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

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / 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: 235477
Nessus Name: F5 Networks BIG-IP : BIG-IP SIP ALG profile vulnerability (K000140937)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

04/23/2025 🔍
05/07/2025 +14 days 🔍
05/07/2025 +0 days 🔍
10/22/2025 +168 days 🔍

Sourcesinfo

Vendor: f5.com

Advisory: K000140937
Status: Confirmed

CVE: CVE-2025-41433 (🔍)
GCVE (CVE): GCVE-0-2025-41433
GCVE (VulDB): GCVE-100-307954

Entryinfo

Created: 05/07/2025 20:32
Updated: 10/22/2025 02:50
Changes: 05/07/2025 20:32 (53), 05/08/2025 18:36 (2), 10/22/2025 02:50 (24)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.