GoBGP up to 3.34.x Flowspec Parser pkg/packet/bgp/bgp.go denial of service

Summaryinfo

A vulnerability, which was classified as problematic, was found in GoBGP up to 3.34.x. The affected element is an unknown function of the file pkg/packet/bgp/bgp.go of the component Flowspec Parser. Such manipulation leads to denial of service. This vulnerability is uniquely identified as CVE-2025-43972. The attack can be launched remotely. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in GoBGP up to 3.34.x and classified as problematic. Affected by this issue is some unknown functionality of the file pkg/packet/bgp/bgp.go of the component Flowspec Parser. The manipulation with an unknown input leads to a denial of service vulnerability. Using CWE to declare the problem leads to CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. Impacted is availability. CVE summarizes:

An issue was discovered in GoBGP before 3.35.0. An attacker can cause a crash in the pkg/packet/bgp/bgp.go flowspec parser by sending fewer than 20 bytes in a certain context.

The advisory is available at github.com. This vulnerability is handled as CVE-2025-43972 since 04/21/2025. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1499 by the MITRE ATT&CK project.

The vulnerability scanner Nessus provides a plugin with the ID 242574 (Ubuntu 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS : GoBGP vulnerabilities (USN-7661-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 3.35.0 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (242574) and EUVD (EUVD-2025-12348). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Name

• GoBGP

Version

• 3.0
• 3.1
• 3.2
• 3.3
• 3.4
• 3.5
• 3.6
• 3.7
• 3.8
• 3.9
• 3.10
• 3.11
• 3.12
• 3.13
• 3.14
• 3.15
• 3.16
• 3.17
• 3.18
• 3.19
• 3.20
• 3.21
• 3.22
• 3.23
• 3.24
• 3.25
• 3.26
• 3.27
• 3.28
• 3.29
• 3.30
• 3.31
• 3.32
• 3.33
• 3.34

CPE 2.3info

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CPE 2.2info

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Entryinfo

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

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