{"id":184233,"date":"2026-11-12T11:41:15","date_gmt":"2026-11-12T09:41:15","guid":{"rendered":"https:\/\/prohoster.info\/blog\/news\/udostoveryayushhij-czentr-emudhra-otozval-eshhyo-8-promezhutochnyh-kornevyh-sertifikatov"},"modified":"2026-11-12T11:41:21","modified_gmt":"2026-11-12T09:41:21","slug":"emudhra-certificate-authority-revokes-8-more-intermediate-root-certificates","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/news\/emudhra-certificate-authority-revokes-8-more-intermediate-root-certificates","title":{"rendered":"Sertifitseerimiskeskus eMudhra t\u00fchistas veel 8 vahepealset juursertifikaati","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

eMudhra avaldas lisainfot seoses juhtumiga, kus kaheksal juursertifikaadil olid kergesti \u00e4raarvatavad privaatv\u00f5tmed, mille entropia oli vaid 1 bait 48 asemel. Lisaks algselt tuvastatud probleemsetele vahe-juursertifikaatidele on \u00e4ra v\u00f5etud veel 8, kuid mitte entropia probleemide t\u00f5ttu. Anal\u00fc\u00fcs n\u00e4itas, et probleemide allikaks oli ise loodud Python-skripti kasutamine privaatv\u00f5tmete edastamiseks erinevate tootjate riistvaralistest v\u00f5tmehoidlatest (HSM). V\u00f5tmete edastamine oli tingitud uuendatud HSM mudelite tarnimise viibimisest, mis vastavad uutest n\u00f5uetest sertifikaadi autoritele. <\/p>\n

Vea t\u00f5ttu k\u00e4rbiti ECDSA privaatv\u00f5tmete suurus 1 baitideks. Lisaks sellele t\u00f6\u00f6tlemise ajal, kui v\u00f5tmeid edastati HSM-ide vahel, t\u00f6\u00f6tles skript privaatv\u00f5tmeid turvamata arvuti m\u00e4lus, kus seda k\u00e4idi, samas kui privaatv\u00f5tmetega tehingud tuleks l\u00e4bi viia ainult HSM-ide sees. HSM-i logid kinnitasid, et riistvaralised hoidlad t\u00f6\u00f6tasid korralikult ja probleem p\u00f5hjustati ise loodu skripti kasutamisest. <\/p>\n

Lisaks ECDSA v\u00f5tmetele kasutati skripti ka 8 RSA-4096 v\u00f5tme edastamiseks, millega probleeme entropiaga ei esinenud, kuid v\u00f5tmete t\u00f6\u00f6tlemine tavalises m\u00e4lus rikub sertifikaadi autoritele esitatavaid turvan\u00f5udeid, seet\u00f5ttu on RSA-sertifikaadid n\u00fc\u00fcd samuti tagandatud.
\n
Allikas: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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