CVE-2009-20009

critical

Description

Belkin Bulldog Plus version 4.0.2 build 1219 contains a stack-based buffer overflow vulnerability in its web service authentication handler. When a specially crafted HTTP request is sent with an oversized Authorization header, the application fails to properly validate the input length before copying it into a fixed-size buffer, resulting in memory corruption and potential remote code execution. Exploitation requires network access and does not require prior authentication.

References

Exploits
More

https://www.exploit-db.com/exploits/8173

https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/http/belkin_bulldog.rb

https://www.vulncheck.com/advisories/belkin-bulldog-plus-web-service-buffer-overflow

https://www.fortiguard.com/encyclopedia/ips/17325/belkin-bulldog-plus-web-services-buffer-overflow

https://s3.belkin.com/support/dl/bulldogwindows.pdf

Details

Source: Mitre, NVD

Published: 2025-08-30

Updated: 2026-04-15

Risk Information

CVSS v2

Base Score: 7.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

Severity: High

CVSS v3

Base Score: 9.8

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Severity: Critical

CVSS v4

Base Score: 9.3

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Severity: Critical

EPSS

EPSS: 0.01532