{"id":36033,"date":"2019-10-31T22:09:16","date_gmt":"2019-10-31T19:09:16","guid":{"rendered":"https:\/\/prohoster.info\/blog\/vypusk-gnupg-2-2-17-s-izmeneniyami-dlya-protivostoyaniya-atake-na-servery-klyuchej\/"},"modified":"2019-10-31T22:09:16","modified_gmt":"2019-10-31T19:09:16","slug":"vypusk-gnupg-2-2-17-s-izmeneniyami-dlya-protivostoyaniya-atake-na-servery-klyuchej","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/news\/vypusk-gnupg-2-2-17-s-izmeneniyami-dlya-protivostoyaniya-atake-na-servery-klyuchej","title":{"rendered":"GnuPG 2.2.17 v\u00e4ljaanne, millel on muudatused v\u00f5tme serverite r\u00fcnnakute t\u00f5rjumiseks","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Avaldatud<\/a><\/noindex> t\u00f6\u00f6riista vabanemine GnuPG 2.2.17<\/a><\/noindex> (GNU Privacy Guard), mis on koosk\u00f5las OpenPGP (RFC-4880<\/a><\/noindex>) ja S\/MIME, pakkudes t\u00f6\u00f6riistu andmete kr\u00fcpteerimiseks, elektrooniliste allkirjade haldamiseks, v\u00f5tmete haldamiseks ja juurdep\u00e4\u00e4suks avalikele v\u00f5tmehoidlatele. Tuletame meelde, et GnuPG 2.2 haru positsioneeritakse kui arenev v\u00e4ljaanne, kuhu lisatakse uusi funktsioone, samas kui haru 2.1 lubab ainult parandusi.<\/p>\n

Uues v\u00e4ljaandes on ettepanekud, kuidas v\u00f5idelda r\u00fcnnakute vastu v\u00f5tme serveritele<\/a><\/noindex>, mis p\u00f5hjustab GnuPG j\u00e4\u00e4tumist ja takistab edasist t\u00f6\u00f6d, kuni probleemne sertifikaat on eemaldatud kohalikust hoidlast v\u00f5i sertifikaadi hoidla on rekonstrueeritud usaldusv\u00e4\u00e4rsete avalike v\u00f5tmete p\u00f5hjal. Lisatud kaitse p\u00f5hineb kolmandate osapoolte digitaalsete allkirjade sertifikaatide automaatse ignoreerimise t\u00e4ielikul ignoreerimisel, kui need on saadud v\u00f5tme hoidlate serveritest. Tuletame meelde, et iga kasutaja v\u00f5ib lisada v\u00f5tme hoidla serverisse oma digitaalallkirja juhuslike sertifikaatide jaoks, mida kurjategijad kasutavad, et luua ohvri sertifikaadile tohutul hulgal selliseid allkirju (\u00fcle sada tuhat), mille t\u00f6\u00f6tlemine h\u00e4irib GnuPG normaalset toimimist.<\/p>\n

Kolmandate osaliste digitaalsete allkirjade ignoreerimist reguleerib seade «self-sigs-only», mis lubab laadida ainult nende loomise enda allkirju. Vana k\u00e4itumise taastamiseks v\u00f5ib gpg.conf faili lisada seade «keyserver-options no-self-sigs-only,no-import-clean». Kui t\u00f6\u00f6protsessis tuvastatakse imporditud plokkide arv, mis p\u00f5hjustab kohalikus salvestuses (pubring.kbx) \u00fclet\u00e4itumise, l\u00fclitab GnuPG automaatselt sisse digitaalsete allkirjade ignoreerimise re\u017eiimi («self-sigs-only,import-clean»), mitte ei v\u00e4ljasta viga. <\/p>\n

V\u00f5tmete uuendamiseks mehhanismi Web Key Directory<\/a><\/noindex> (WKD) on lisatud seade «—locate-external-key», mida saab kasutada sertifikaadihalduse uuendamiseks usaldusv\u00e4\u00e4rsete avalike v\u00f5tmete p\u00f5hjal. Operatsiooni «—auto-key-retrieve» t\u00e4itmisel on WKD mehhanism n\u00fc\u00fcd eelistatavam kui v\u00f5tmeserverid. WKD p\u00f5him\u00f5te seisneb selles, et avalikud v\u00f5tmed paigutatakse veebis koos domeeniga, mis on seotud e-posti aadressiga. N\u00e4iteks e-posti aadressi «test@example.com» korral v\u00f5ib v\u00f5ti olla laaditud lingilt «https:\/\/example.com\/.well-known\/openpgpkey\/hu\/183d7d5ab73cfceece9a5594e6039d5a».<\/p>\n

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

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

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