{"id":35556,"date":"2019-10-31T22:04:59","date_gmt":"2019-10-31T19:04:59","guid":{"rendered":"https:\/\/prohoster.info\/blog\/v-openssh-dobavlena-zashhita-ot-atak-po-storonnim-kanalam\/"},"modified":"2019-10-31T22:04:59","modified_gmt":"2019-10-31T19:04:59","slug":"v-openssh-dobavlena-zashhita-ot-atak-po-storonnim-kanalam","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/news\/v-openssh-dobavlena-zashhita-ot-atak-po-storonnim-kanalam","title":{"rendered":"OpenSSH on lisatud kaitse k\u00fclgkanali r\u00fcnnakute vastu","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Damien Miller (djm @) lisatud<\/a><\/noindex> OpenSSH on t\u00e4iendanud funktsionaalsust, mis peaks aitama kaitsta erinevate k\u00fclgkanalitest toimuvate r\u00fcnnakute eest, nagu Spectre, Meltdown<\/a><\/noindex>, RowHammer<\/a><\/noindex> ja RAMBleed<\/a><\/noindex>. Lisatud kaitse on m\u00f5eldud selleks, et takistada privaatse v\u00f5tme taastamist, mis asub m\u00e4lus, kasutades k\u00fclgkanalitest lekkinud andmeid.<\/p>\n

Kaitse olemus seisneb selles, et privaatv\u00f5tmed, kui neid ei kasutata, kr\u00fcpteeritakse s\u00fcmmeetrilise v\u00f5tmega, mis on saadud suhteliselt suurest \"eelv\u00f5tmest\" (prekey), mis koosneb juhuslikest andmetest (praegune suurus on 16 KB).
\nRakenduse seisukohalt kr\u00fcpteeritakse privaatv\u00f5tmed m\u00e4llu laadimisel ning seej\u00e4rel dekr\u00fcpteeritakse automaatselt ja silmapilkselt, kui neid kasutatakse allkirjastamiseks v\u00f5i salvestamiseks\/serialiseerimiseks.<\/p>\n

Eduka r\u00fcnnaku jaoks peavad kurjategijad eelv\u00f5tme taastama k\u00f5rge t\u00e4psusega, enne kui nad saavad proovida dekr\u00fcpteerida kaitstud privaatv\u00f5tit. Kuid praeguse p\u00f5lvkonna r\u00fcnnakutel on bitikaitse taastamisel selline vigade sagedus, et nende vigade kogum muudab eelv\u00f5tme \u00f5ige taastamise ebat\u00f5en\u00e4oliseks.<\/p>\n

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

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

\u0414\u044d\u043c\u0438\u0435\u043d \u041c\u0438\u043b\u043b\u0435\u0440 (djm @) \u0434\u043e\u0431\u0430\u0432\u0438\u043b \u0432 OpenSSH \u0443\u043b\u0443\u0447\u0448\u0435\u043d\u0438\u0435, \u043a\u043e\u0442\u043e\u0440\u043e\u0435 \u0434\u043e\u043b\u0436\u043d\u043e \u043f\u043e\u043c\u043e\u0447\u044c \u0437\u0430\u0449\u0438\u0442\u0438\u0442\u044c \u043e\u0442 \u0440\u0430\u0437\u043b\u0438\u0447\u043d\u044b\u0445 \u0430\u0442\u0430\u043a \u043f\u043e \u0441\u0442\u043e\u0440\u043e\u043d\u043d\u0438\u043c \u043a\u0430\u043d\u0430\u043b\u0430\u043c, \u0442\u0430\u043a\u0438\u043c \u043a\u0430\u043a Spectre, Meltdown, RowHammer \u0438 RAMBleed. \u0414\u043e\u0431\u0430\u0432\u043b\u0435\u043d\u043d\u0430\u044f \u0437\u0430\u0449\u0438\u0442\u0430 \u043f\u0440\u0438\u0437\u0432\u0430\u043d\u0430 \u043f\u0440\u0435\u0434\u043e\u0442\u0432\u0440\u0430\u0442\u0438\u0442\u044c \u0432\u043e\u0441\u0441\u0442\u0430\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0435 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