{"id":71650,"date":"2020-02-27T08:51:33","date_gmt":"2020-02-27T05:51:33","guid":{"rendered":"https:\/\/prohoster.info\/blog\/mozilla-nachinaet-vnedrenie-tehnologii-izolyaczii-bibliotek-rlbox"},"modified":"2020-03-03T16:10:40","modified_gmt":"2020-03-03T13:10:40","slug":"mozilla-nachinaet-vnedrenie-tehnologii-izolyaczii-bibliotek-rlbox","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sq\/blog\/novosti-interneta\/mozilla-nachinaet-vnedrenie-tehnologii-izolyaczii-bibliotek-rlbox","title":{"rendered":"Mozilla fillon implementimin e teknologjis\u00eb s\u00eb izolimit RLBox","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

K\u00ebrkuesit nga Universiteti i Stanfordit, Universiteti i Kalifornis\u00eb n\u00eb San Diego dhe Universiteti i Teksasit n\u00eb Austin kan\u00eb zhvilluar<\/a><\/noindex> mjet RLBox<\/a><\/noindex>, i cili mund t\u00eb p\u00ebrdoret si nj\u00eb nivel shtes\u00eb izolimi p\u00ebr t\u00eb bllokuar vulnerabilitetet n\u00eb bibliotekat e funksioneve. RLBox synon t\u00eb zgjidh\u00eb problemin e siguris\u00eb s\u00eb bibliotekave t\u00eb jashtme q\u00eb nuk kontrollohen nga zhvilluesit, por vulnerabilitetet e t\u00eb cilave mund t\u00eb komprometojn\u00eb projektin kryesor. <\/p>\n

Kompania Mozilla planifikon<\/a><\/noindex> t\u00eb angazhohet RLBox n\u00eb nd\u00ebrtimet Linux t\u00eb Firefox 74 dhe nd\u00ebrtimet macOS t\u00eb Firefox 75 p\u00ebr t\u00eb izoluara ekzekutimin e bibliotek\u00ebs Graphite<\/a><\/noindex>, e cila \u00ebsht\u00eb p\u00ebrgjegj\u00ebse p\u00ebr paraqitjen e fonteve. Nd\u00ebrsa RLBox nuk \u00ebsht\u00eb specifik p\u00ebr Firefox dhe mund t\u00eb p\u00ebrdoret p\u00ebr t\u00eb izoluar \u00e7do bibliotek\u00eb n\u00eb projekte t\u00eb ndryshme. Punimet<\/a><\/noindex> RLBox shp\u00ebrndahen<\/a><\/noindex> n\u00eb licenc\u00ebn MIT. Aktualisht RLBox mb\u00ebshtet pun\u00ebn n\u00eb platforma Linux dhe macOS, mb\u00ebshtetje p\u00ebr Windows pritet m\u00eb von\u00eb.<\/p>\n

Mekanizmi<\/a><\/noindex> Puna e RLBox konsiston n\u00eb kompilimin e kodit C\/C++ nga nj\u00eb bibliotek\u00eb e izoluar n\u00eb kodin e nd\u00ebrmjet\u00ebm me nivel t\u00eb ul\u00ebt WebAssembly, i cili m\u00eb pas formohet si nj\u00eb modul WebAssembly, me autorizimet e tij t\u00eb caktuara vet\u00ebm p\u00ebr k\u00ebt\u00eb modul (p\u00ebr shembull, nj\u00eb bibliotek\u00eb p\u00ebr p\u00ebrpunimin e vargjeve nuk do t\u00eb mund t\u00eb hap\u00eb nj\u00eb socket rrjeti ose nj\u00eb sked\u00eb). Transformimi i kodit C\/C++ n\u00eb WebAssembly realizohet p\u00ebrmes wasi-sdk<\/a><\/noindex>. <\/p>\n

P\u00ebr ekzekutimin e drejtp\u00ebrdrejt\u00eb, moduli WebAssembly kompilohet n\u00eb kod makine me ndihm\u00ebn e kompilatorit Lucet<\/a><\/noindex> dhe kryhet n\u00eb nj\u00eb «nano-proces» t\u00eb ve\u00e7ant\u00eb, i izoluar nga pjesa tjet\u00ebr e memories s\u00eb aplikacionit. Kompajleri Lucet bazohet n\u00eb t\u00eb nj\u00ebjtin kod si motori JIT Cranelift<\/a><\/noindex>, i cili p\u00ebrdoret n\u00eb Firefox p\u00ebr ekzekutimin e WebAssembly. <\/p>\n

Moduli i nd\u00ebrtuar punon n\u00eb nj\u00eb zon\u00eb t\u00eb ve\u00e7ant\u00eb t\u00eb memories dhe nuk ka akses n\u00eb hap\u00ebsir\u00ebn e adresave t\u00eb tjera. N\u00eb rastin e shfryt\u00ebzimit t\u00eb nj\u00eb dobie n\u00eb bibliotek\u00eb, sulmuesi do t\u00eb jet\u00eb i kufizuar dhe nuk do t\u00eb mund t\u00eb qasjej n\u00eb zonat e memories s\u00eb procesit kryesor ose t\u00eb kaloj\u00eb kontrollin jasht\u00eb mjedisit t\u00eb izoluar. <\/p>\n

\"Mozilla<\/a><\/noindex><\/center><\/p>\n

P\u00ebr zhvilluesit \u00ebsht\u00eb ofruar nj\u00eb nivel i lart\u00eb API<\/a><\/noindex>, i cili lejon thirrjen e funksioneve t\u00eb bibliotek\u00ebs n\u00eb modalitetin izoluese. WebAssembly-handlers k\u00ebrkojn\u00eb pothuajse asnj\u00eb burim shtes\u00eb dhe nd\u00ebrveprimi me to nuk \u00ebsht\u00eb shum\u00eb m\u00eb i ngadalsh\u00ebm se thirrja e funksioneve t\u00eb zakonshme (funksionet e bibliotek\u00ebs ekzekutohen si kod natyror, dhe shp\u00ebrndarjet ndodhin vet\u00ebm gjat\u00eb kopjimit dhe verifikimit t\u00eb t\u00eb dh\u00ebnave n\u00eb procesin e nd\u00ebrveprimit me mjedisin e izoluar). Funksionet e bibliotek\u00ebs izoluese nuk mund t\u00eb thirren drejtp\u00ebrdrejt dhe p\u00ebr t\u00eb arritur ato \u00ebsht\u00eb e nevojshme t\u00eb p\u00ebrdoren
\n shtresa invoke_sandbox_function(). <\/p>\n

Nga ana tjet\u00ebr, n\u00ebse nga biblioteka duhen thirrur funksione t\u00eb jashtme, k\u00ebto funksione duhet t\u00eb definohen qart\u00eb me metod\u00ebn register_callback (n\u00eb m\u00ebnyr\u00eb t\u00eb paracaktuar, RLBox ofron qasje n\u00eb funksionet e bibliotek\u00ebs standarde<\/a><\/noindex>). P\u00ebr t\u00eb siguruar nj\u00eb funksionim t\u00eb sigurt me kujtes\u00ebn (memory safety), izolimi i ekzekutimit t\u00eb kodit nuk \u00ebsht\u00eb mjaftuesh\u00ebm dhe k\u00ebrkohet gjithashtu t\u00eb sigurohet verifikimi i rrjedhave t\u00eb t\u00eb dh\u00ebnave t\u00eb kthyera.<\/p>\n

Vlerat e formuar n\u00eb mjedisin e izoluar sh\u00ebnohen si t\u00eb pabesueshme, kufizohen duke p\u00ebrdorur etiketat e ndotura<\/a><\/noindex> dhe p\u00ebr «pastrimin» k\u00ebrkojn\u00eb verifikimin<\/a><\/noindex> dhe kopjimit n\u00eb kujtes\u00ebn e aplikacionit.
\nPa pastrim, p\u00ebrpjekja p\u00ebr t\u00eb p\u00ebrdorur t\u00eb dh\u00ebnat e ndotura n\u00eb nj\u00eb kontekst q\u00eb k\u00ebrkon t\u00eb dh\u00ebna normale (dhe anasjelltas) \u00e7on n\u00eb gjenerimin e gabimeve n\u00eb faz\u00ebn e kompajlimit. Argumentet e vogla t\u00eb funksioneve, vlerat e kthimit dhe strukturat transferohen p\u00ebrmes kopjimit midis memories s\u00eb procesit dhe memories s\u00eb ambientit t\u00eb izoluar. P\u00ebr grupe t\u00eb m\u00ebdha t\u00eb dh\u00ebnash, memoria ndahet n\u00eb ambientin e izoluar, nd\u00ebrsa procesit kryesor i kthehet nj\u00eb tregues i drejtp\u00ebrdrejt\u00eb «sandbox-reference». <\/p>\n

<\/a><\/noindex><\/p>\n

Burimi: opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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