{"id":182030,"date":"2026-06-12T02:48:17","date_gmt":"2026-06-12T00:48:17","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimost-v-phpbb-pozvolyayushhaya-poluchit-dostup-k-lyubomu-akkauntu-bez-autentifikaczii"},"modified":"2026-06-12T02:48:17","modified_gmt":"2026-06-12T00:48:17","slug":"uyazvimost-v-phpbb-pozvolyayushhaya-poluchit-dostup-k-lyubomu-akkauntu-bez-autentifikaczii","status":"publish","type":"post","link":"https:\/\/prohoster.info\/da\/blog\/news\/uyazvimost-v-phpbb-pozvolyayushhaya-poluchit-dostup-k-lyubomu-akkauntu-bez-autentifikaczii","title":{"rendered":"S\u00e5rbarhed i phpBB, der tillader adgang til enhver konto uden autentificering","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

I det frie forum motor phpBB er der blevet opdaget en s\u00e5rbarhed, der tillader en enkelt HTTP-anmodning at tilslutte sig sessionen for enhver forumbruger. S\u00e5rbarheden opst\u00e5r i phpBB's standardkonfiguration. Problemet er l\u00f8st i version phpBB 3.3.17.<\/p>\n

Ved angreb p\u00e5 almindelige brugere kan der skaffes adgang til privat korrespondance og mulighed for at sende beskeder p\u00e5 brugerens vegne. Ved angreb p\u00e5 moderatorer og administratorer kan man slette andres beskeder, se IP-adresser<\/a> og e-mail, l\u00e6se privat korrespondance, men man kan ikke f\u00e5 adgang til administratorgr\u00e6nsefladen og f\u00e5 adgang til v\u00e6rten. <\/p>\n

Der er ikke angivet detaljer om s\u00e5rbarheden, men ved hj\u00e6lp af AI er metoden til udnyttelse blevet genskabt baseret p\u00e5 en korrektion, som involverer kald til behandleren «login_link» med indstillingen af godkendelsesmetoden «auth_provider=apache» og indl\u00e6sning af brugernavnet gennem Basic Auth. Herefter vil PHP s\u00e6tte milj\u00f8variabelen «PHP_AUTH_USER=brugernavn», og phpBB vil udtr\u00e6kke brugernavnet uden at tjekke adgangskoden. For eksempel for at f\u00e5 session-id'et for brugeren admin og gemme det i filen cookies.txt kan f\u00f8lgende kode udf\u00f8res:<\/p>\n

curl -i -s \
\n -c cookies.txt \
\n -b cookies.txt \
\n -u ‘admin:anything’ \
\n -d ‘login=Login&login_username=admin&login_password=anything’ \
\n ‘https:\/\/target.example\/forum\/ucp.php?mode=login_link&auth_provider=apache&login_link_any=1’
\n
Kilde: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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