CVE-2009-20009

CRITICAL

Belkin Bulldog Plus 4.0.2 build 1219 - Buffer Overflow

Title source: llm

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.

Exploits (2)

exploitdb WORKING POC VERIFIED

by Elazar · textremotewindows

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

View Code ZIP pw:eip

metasploit WORKING POC NORMAL

by MC · rubypocwin

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

View Code ZIP pw:eip

References (5)

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

[Various Sources] https://s3.belkin.com/support/dl/bulldogwindows.pdf

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

[Exploit, Third Party Advisory] https://www.exploit-db.com/exploits/8173

[Third Party Advisory] https://www.vulncheck.com/advisories/belkin-bulldog-plus-web-service-buffer-overflow

Scores

CVSS v4 9.3

EPSS 0.6260

EPSS Percentile 98.4%

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

CISA SSVC

Vulnrichment

Exploitation poc

Automatable yes

Technical Impact total

Details

CWE

CWE-121

Status published

Products (1)

Belkin International, Inc./Bulldog Plus UPS Monitoring Software < 4.0.2 build 1219

Published Aug 30, 2025

Tracked Since Feb 18, 2026