CVE-2009-20009 json
Belkin Bulldog Plus Web Service Buffer Overflow
published 2025-08-30 14 mo ago modified 2026-10-01 38 d ago also EUVD-2009-5122
- cvss
- 9.3
- version 4.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.8%
- EPSS 1.8% chance of exploitation in 30 days, percentile 78%
- public exploits
- 1
- Metasploit
Summary
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.
Timeline
- First public exploit (Metasploit exploit/windows/http/belkin_bulldog)
- Published
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- yes
- Technical impact
- total
- Assessed
- 14 mo ago
Exploit prediction
1.82% chance of exploitation in the next 30 days, higher than 78% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- Metasploit exploit/windows/http/belkin_bulldog Belkin Bulldog Plus Web Service Buffer Overflow metasploit exploit, average rank, 2009-03-08
- raw.githubusercontent.com https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/http/belkin_bulldog.rb referenced PoC, tagged "exploit" by a source, unverified
- exploit-db.com https://www.exploit-db.com/exploits/8173 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 9.3 | 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 |
| CNA | 4.0 | 9.3 | 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Affected products
- Belkin International, Inc. Bulldog Plus UPS Monitoring Software
Classification
- Weakness
-
- CWE-121 Stack-based Buffer Overflow
References
-
raw.githubusercontent.com
/rapid7/metasploit-framework/master/modules/exploits/windows/http/belkin_bulldog.rb
exploit
-
exploit-db.com
/exploits/8173
exploit
-
fortiguard.com
/encyclopedia/ips/17325/belkin-bulldog-plus-web-services-buffer-overflow
third-party-advisory
-
s3.belkin.com
/support/dl/bulldogwindows.pdf
product
-
vulncheck.com
/advisories/belkin-bulldog-plus-web-service-buffer-overflow
third-party-advisory
Sources
- CVE List CVE-2009-20009
- NVD CVE-2009-20009
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.