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Travel - Hack The Box

Travel is an awesome box from my ATeam teammates xct and jkr. The box has a code review part where we analyze the source code of a PHP web app to find a command injection vulnerability in a curl command. We then use the Gopher protocol to perform SSRF and write a serialized PHP payload into the memcache database. For the priv esc part, we manipulate attributes of a user in an LDAP database which is used by the NSS facility to extend the Linux authentication database.