Description
The Debut embedded http server contains a remotely exploitable denial of service where a single malformed HTTP POST request can cause the server to hang until eventually replying (~300 seconds) with an HTTP 500 error. While the server is hung, print jobs over the network are blocked and the web interface is inaccessible. An attacker can continuously send this malformed request to keep the device inaccessible to legitimate traffic.
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
Metasploit 1 module
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Brother Debut http Denial Of Service
auxiliary/dos/http/brother_debut_dos
Exploit-DB 1
- Debut Embedded HTTPd 1.20 - Denial of Service EDB-43119 · dos · Nov 2, 2017
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
References
- https://www.trustwave.com/Resources/Security-Advisories/Advisories/TWSL2017-017/?fid=10211
- https://www.trustwave.com/Resources/SpiderLabs-Blog/Denial-of-Service-Vulnerability-in-Brother-Printers/?page=1&year=0&month=0&LangType=1033
- http://packetstormsecurity.com/files/144908/Debut-Embedded-httpd-1.20-Denial-Of-Service.html
- 43119 exploit