{"id":36619,"date":"2019-10-31T22:12:43","date_gmt":"2019-10-31T19:12:43","guid":{"rendered":"https:\/\/prohoster.info\/blog\/post-analiz-chto-izvestno-o-poslednej-atake-na-set-serverov-kriptoklyuchej-sks-keyserver\/"},"modified":"2019-10-31T22:12:43","modified_gmt":"2019-10-31T19:12:43","slug":"post-analiz-chto-izvestno-o-poslednej-atake-na-set-serverov-kriptoklyuchej-sks-keyserver","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sq\/blog\/administrirovanie\/post-analiz-chto-izvestno-o-poslednej-atake-na-set-serverov-kriptoklyuchej-sks-keyserver","title":{"rendered":"Post-analiz\u00eb: \u00e7far\u00eb dihet p\u00ebr sulmin e fundit ndaj rrjetit t\u00eb server\u00ebve t\u00eb \u00e7el\u00ebsave t\u00eb kriptografis\u00eb SKS Keyserver","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Hacker\u00ebt kan\u00eb shfryt\u00ebzuar nj\u00eb ve\u00e7ori t\u00eb protokollit OpenPGP, e cila njihet prej m\u00eb shum\u00eb se dhjet\u00eb vjet\u00ebsh. <\/p>\n<p>P\u00ebrshkruajm\u00eb se cila \u00ebsht\u00eb thelbi dhe pse nuk mund t\u00eb mbyllet.<\/p>\n<p><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/vasexperts\/blog\/461443\/\"><img decoding=\"async\" alt=\"Post-analiz\u00eb: \u00e7far\u00eb dihet p\u00ebr sulmin e fundit ndaj rrjetit t\u00eb server\u00ebve t\u00eb \u00e7el\u00ebsave t\u00eb kriptografis\u00eb SKS Keyserver\" src=\"\/wp-content\/uploads\/2019\/07\/d8fec24b72a147e758eb1174eecb7336.jpeg\" style=\"display:block;margin: 0 auto;\" \/><\/a><\/noindex><noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><br \/>\n<i>\/ Unsplash \/ <noindex><a rel=\"nofollow\" href=\"https:\/\/unsplash.com\/photos\/8fs1X0JFgFE\">Chunlea Ju<\/a><\/noindex><\/i><\/p>\n<h2>Problemet n\u00eb rrjet<\/h2>\n<p>\nN\u00eb mes t\u00eb qershorit, persona t\u00eb paidentifikuar <noindex><a rel=\"nofollow\" href=\"https:\/\/gist.github.com\/rjhansen\/67ab921ffb4084c865b3618d6955275f\">organizuan nj\u00eb sulm<\/a><\/noindex> ndaj rrjetit t\u00eb server\u00ebve t\u00eb \u00e7el\u00ebsave kriptografik\u00eb <noindex><a rel=\"nofollow\" href=\"https:\/\/bitbucket.org\/skskeyserver\/sks-keyserver\/src\/default\/\">SKS Keyserver<\/a><\/noindex>, i nd\u00ebrtuar mbi baz\u00ebn e protokollit OpenPGP. Ky \u00ebsht\u00eb nj\u00eb standard IETF (<noindex><a rel=\"nofollow\" href=\"https:\/\/tools.ietf.org\/html\/rfc4880\">RFC 4880<\/a><\/noindex>), i cili p\u00ebrdoret p\u00ebr enkriptimin e email-eve dhe mesazheve t\u00eb tjera. Rrjeti SKS u krijua tridhjet\u00eb vjet m\u00eb par\u00eb p\u00ebr shp\u00ebrndarjen e certifikatave publike. Ai lidhet me mjete si <noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/GnuPG\">GnuPG<\/a><\/noindex> p\u00ebr enkriptimin e t\u00eb dh\u00ebnave dhe krijimin e n\u00ebnshkrimeve digjitale elektronike.<\/p>\n<p>Hacker\u00ebt kan\u00eb komprometuar certifikatave t\u00eb dy mbajt\u00ebsve t\u00eb projektit GnuPG \u2014 Robert Hansen dhe Daniel Gillmor. Shkarkimi i nj\u00eb certifikate t\u00eb cenuar nga serveri \u00e7on n\u00eb d\u00ebshtimin e GnuPG \u2014 sistemi thjesht ngec. Ka arsye p\u00ebr t\u00eb besuar se ky sulmues nuk do t\u00eb ndalet k\u00ebtu dhe numri i certifikatave t\u00eb komprometuara do t\u00eb rritet vet\u00ebm. Deri m\u00eb tani, shkalla e problemit mbetet e panjohur.<\/p>\n<h2>Thelbi i sulmit<\/h2>\n<p>\nHacker\u00ebt shfryt\u00ebzuan nj\u00eb dob\u00ebsi n\u00eb protokollin OpenPGP. Ajo \u00ebsht\u00eb e njohur n\u00eb komunitet p\u00ebr shum\u00eb vite. Edhe n\u00eb GitHub <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/micahflee\/trollwot\">mund t\u00eb gjeni<\/a><\/noindex> eksploit\u00ebt p\u00ebrkat\u00ebs. Por deri tani, askush nuk ka marr\u00eb p\u00ebrsip\u00ebr p\u00ebrgjegj\u00ebsin\u00eb p\u00ebr t\u00eb mbyllur \"vrim\u00ebn\" (m\u00eb von\u00eb do t\u00eb flasim p\u00ebr arsyet m\u00eb n\u00eb holl\u00ebsi).<\/p>\n<blockquote><p><b>Nj\u00eb p\u00ebrzgjedhje nga blogu yn\u00eb n\u00eb Habr:<\/b><\/p>\n<ul>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/vasexperts\/blog\/446634\/\">SDN-dita \u2014 gjasht\u00eb emulator\u00eb me kod t\u00eb hapur<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/vasexperts\/blog\/446058\/\">Si t\u00eb nd\u00ebrtoni SDN \u2014 tet\u00eb mjete me kod t\u00eb hapur<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/vasexperts\/blog\/433298\/\">Dita e rrjetit: 17 materiale ekspert\u00ebsh mbi Wi-Fi dhe 5G<\/a><\/noindex><\/li>\n<\/ul>\n<\/blockquote>\n<p>\nSipas specifikimeve t\u00eb OpenPGP, kushdo mund t\u00eb shtoj\u00eb n\u00ebnshkrime digjitale n\u00eb certifikata p\u00ebr t\u00eb konfirmuar pron\u00ebsin\u00eb e tyre. Numri maksimal i n\u00ebnshkrimeve nuk \u00ebsht\u00eb rregulluar. K\u00ebtu lind nj\u00eb problem \u2014 rrjeti SKS lejon vendosjen e deri n\u00eb 150 mij\u00eb n\u00ebnshkrimesh n\u00eb nj\u00eb certifikat\u00eb, por GnuPG nuk e p\u00ebrkrah nj\u00eb num\u00ebr kaq t\u00eb madh. Prandaj, kur ngarkohet nj\u00eb certifikat\u00eb nga GnuPG (si dhe realizime t\u00eb tjera t\u00eb OpenPGP), sistemi ngadal\u00ebsohet.<\/p>\n<p>Nj\u00eb nga p\u00ebrdoruesit <noindex><a rel=\"nofollow\" href=\"https:\/\/buttondown.email\/cryptography-dispatches\/archive\/cryptography-dispatches-hello-world-and-openpgp\/\">ka kryer nj\u00eb eksperiment<\/a><\/noindex> \u2014 importimi i certifikat\u00ebs i mori atij rreth 10 minuta. Certifikata kishte m\u00eb shum\u00eb se 54 mij\u00eb n\u00ebnshkrime, dhe pesha e saj ishte 17 MB:<\/p>\n<pre><code class=\"bash\">$ gpg --homedir=$PWD --recv C4BC2DDB38CCE96485EBE9C2F20691179038E5C6\ngpg: \u00e7el\u00ebsi F20691179038E5C6: 4 n\u00ebnshkrime t\u00eb rip\u00ebrs\u00ebritura u hoq\u00ebn\ngpg: \u00e7el\u00ebsi F20691179038E5C6: 54614 n\u00ebnshkrime nuk u kontrolluan p\u00ebr shkak t\u00eb munges\u00ebs s\u00eb \u00e7el\u00ebsave\ngpg: \u00e7el\u00ebsi F20691179038E5C6: 4 n\u00ebnshkrime u riorganizuan\ngpg: \u00e7el\u00ebsi publik \"Daniel Kahn Gillmor &lt;dkg@fifthhorseman.net&gt;\" u importua\ngpg: nuk u gjet asnj\u00eb \u00e7el\u00ebs n\u00eb fund t\u00eb besuar\ngpg: Numri total i procesuar: 1\ngpg:               u importua: 1\n$ ls -lh pubring.gpg\n-rw-r--r--  1 filippo  staff    17M  2 Jul 16:30 pubring.gpg\n<\/code><\/pre>\n<p>\nSituata e v\u00ebshtir\u00ebsohet nga fakti q\u00eb server\u00ebt e \u00e7el\u00ebsave me OpenPGP nuk fshijn\u00eb informacionin mbi certifikatat. Kjo \u00ebsht\u00eb b\u00ebr\u00eb p\u00ebr t\u00eb ndihmuar n\u00eb ndjekjen e \u00e7do veprimi me certifikatat dhe p\u00ebr t\u00eb eliminuar mund\u00ebsin\u00eb e falsifikimit t\u00eb tyre. Prandaj, elementet e komprometuar nuk mund t\u00eb hiqen.<\/p>\n<p>N\u00eb thelb, rrjeti SKS paraqet nj\u00eb \"server t\u00eb madh skedar\u00ebsh\", ku \u00e7do kush mund t\u00eb regjistroj\u00eb t\u00eb dh\u00ebna. P\u00ebr t\u00eb ilustruar problemin, vitin e kaluar nj\u00eb rezident i GitHub <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/yakamok\/keyserver-fs\">krijoi nj\u00eb sistem skedar\u00ebsh<\/a><\/noindex>, i cili ruan dokumente n\u00eb rrjetin e server\u00ebve t\u00eb \u00e7el\u00ebsave kriptografik\u00eb.<\/p>\n<h2>Pse nuk u mbyll pika e dob\u00ebt<\/h2>\n<p>\nNuk kishte arsye p\u00ebr mbylljen e pik\u00ebs s\u00eb dob\u00ebt. Ajo nuk ishte p\u00ebrdorur m\u00eb par\u00eb p\u00ebr sulme hakera. Megjithat\u00eb, komuniteti IT <noindex><a rel=\"nofollow\" href=\"https:\/\/news.ycombinator.com\/item?id=20315633\">ka k\u00ebrkuar prej koh\u00ebsh<\/a><\/noindex> nga zhvilluesit e SKS dhe OpenPGP t\u00eb v\u00ebn\u00eb re problemin.<\/p>\n<p>P\u00ebr drejt\u00ebsin\u00eb e tregimit, duhet theksuar se n\u00eb qershor ata p\u00ebrfundimisht <noindex><a rel=\"nofollow\" href=\"https:\/\/keys.openpgp.org\/about\/news#2019-06-12-launch\">nisi<\/a><\/noindex> krijuan nj\u00eb server eksperimental \u00e7el\u00ebsash <noindex><a rel=\"nofollow\" href=\"https:\/\/keys.openpgp.org\/about\/news\">keys.openpgp.org<\/a><\/noindex>. N\u00eb t\u00eb, \u00ebsht\u00eb realizuar mbrojtje nga lloje t\u00eb till\u00eb sulmesh. Megjithat\u00eb, baza e t\u00eb dh\u00ebnave t\u00eb tij po plot\u00ebsohet nga fillimi, dhe vet\u00eb serveri nuk \u00ebsht\u00eb pjes\u00eb e SKS. Prandaj, do t\u00eb kaloj\u00eb koh\u00eb p\u00ebrpara se t\u00eb jet\u00eb i p\u00ebrdorsh\u00ebm.<\/p>\n<p><img decoding=\"async\" alt=\"Post-analiz\u00eb: \u00e7far\u00eb dihet p\u00ebr sulmin e fundit ndaj rrjetit t\u00eb server\u00ebve t\u00eb \u00e7el\u00ebsave t\u00eb kriptografis\u00eb SKS Keyserver\" src=\"\/wp-content\/uploads\/2019\/07\/6ab10981f7c6215cede6e26c2fd3aa5c.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>\/ Unsplash \/ <noindex><a rel=\"nofollow\" href=\"https:\/\/unsplash.com\/photos\/_DkmMhzrsYY\">Rub\u00e9n Bag\u00fc\u00e9s<\/a><\/noindex><\/i><\/p>\n<p>Sa i p\u00ebrket defektit n\u00eb sistemin origjinal, nj\u00eb mekaniz\u00ebm i komplikuar sinkronizimi pengon riparimin e tij. Rrjeti i server\u00ebve t\u00eb \u00e7el\u00ebsit fillimisht u shkrua si nj\u00eb prov\u00eb koncepti p\u00ebr mbrojtjen e disertacionit t\u00eb doktoratur\u00ebs nga Yaron Minsky. Dhe p\u00ebr pun\u00ebn, u zgjodh nj\u00eb gjuh\u00eb e ve\u00e7ant\u00eb OCaml. P\u00ebr <noindex><a rel=\"nofollow\" href=\"https:\/\/gist.github.com\/rjhansen\/67ab921ffb4084c865b3618d6955275f\">autoreve, sistemi do t\u00eb zvog\u00ebloj\u00eb shpenzimet p\u00ebr energjin\u00eb me dyfish.<\/a><\/noindex> mantenuesin Robert Hansen, \u00ebsht\u00eb e v\u00ebshtir\u00eb t\u00eb kuptohet kodi, ndaj n\u00eb t\u00eb b\u00ebhen vet\u00ebm p\u00ebrmir\u00ebsime t\u00eb vogla. P\u00ebr t\u00eb modifikuar arkitektur\u00ebn e SKS, do t\u00eb duhet ta shkruani nga e para.<\/p>\n<p>N\u00eb \u00e7do rast, n\u00eb GnuPG nuk besojn\u00eb se rrjeti ndonj\u00ebher\u00eb do t\u00eb jet\u00eb i mundur p\u00ebr t'u riparuar. N\u00eb nj\u00eb postim n\u00eb GitHub, zhvilluesit madje shkruan se nuk rekomandojn\u00eb pun\u00ebn me SKS Keyserver. N\u00eb thelb, kjo \u00ebsht\u00eb nj\u00eb nga arsyet kryesore pse ata iniciuan kalimin n\u00eb sh\u00ebrbimin e ri keys.openpgp.org. Na mbetet vet\u00ebm t\u00eb ndjekim zhvillimin e m\u00ebtejsh\u00ebm t\u00eb ngjarjeve.<\/p>\n<blockquote><p><b>Nj\u00eb \u00e7ift materialesh nga blogu yn\u00eb korporativ:<\/b><\/p>\n<ul>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/vasexperts.ru\/blog\/bezopasnost\/botnet-spamit-cherez-routery\/\">Botneti 'spamon' p\u00ebrmes ruterave: \u00e7far\u00eb duhet t\u00eb dini<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/vasexperts.ru\/blog\/bezopasnost\/ddos-i-5g-tolshhe-truba-bolshe-problem\/\">DDoS dhe 5G: m\u00eb e trash\u00eb 'tuba' \u2014 m\u00eb shum\u00eb probleme<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/vasexperts.ru\/blog\/bezopasnost\/firewall-ili-dpi-instrumenty-zashhity-raznogo-naznacheniya\/\">Firewall ose DPI \u2014 mjete mbrojtjeje me q\u00ebllime t\u00eb ndryshme<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/vasexperts.ru\/blog\/telekom\/internet-v-derevnyu-stroim-radiorelejnuyu-wi-fi-set\/\">Internet n\u00eb fshat \u2014 nd\u00ebrtimi i nj\u00eb rrjeti Wi-Fi me radiorele<\/a><\/noindex><\/li>\n<\/ul>\n<\/blockquote>\n<p>Burimi: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/vasexperts\/blog\/461443\/\">habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0425\u0430\u043a\u0435\u0440\u044b \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043b\u0438 \u043e\u0441\u043e\u0431\u0435\u043d\u043d\u043e\u0441\u0442\u044c \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u0430 OpenPGP, \u043e \u043a\u043e\u0442\u043e\u0440\u043e\u0439 \u0438\u0437\u0432\u0435\u0441\u0442\u043d\u043e \u0431\u043e\u043b\u0435\u0435 \u0434\u0435\u0441\u044f\u0442\u0438 \u043b\u0435\u0442. \u0420\u0430\u0441\u0441\u043a\u0430\u0437\u044b\u0432\u0430\u0435\u043c, \u0432 \u0447\u0435\u043c \u0441\u0443\u0442\u044c \u0438 \u043f\u043e\u0447\u0435\u043c\u0443 \u0435\u0451 \u043d\u0435 \u043c\u043e\u0433\u0443\u0442 \u0437\u0430\u043a\u0440\u044b\u0442\u044c. \/ Unsplash \/ Chunlea Ju \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u044b \u0432 \u0441\u0435\u0442\u0438 \u0412 \u0441\u0435\u0440\u0435\u0434\u0438\u043d\u0435 \u0438\u044e\u043d\u044f \u043d\u0435\u0438\u0437\u0432\u0435\u0441\u0442\u043d\u044b\u0435 \u043f\u0440\u043e\u0432\u0435\u043b\u0438 \u0430\u0442\u0430\u043a\u0443 \u043d\u0430 \u0441\u0435\u0442\u044c \u0441\u0435\u0440\u0432\u0435\u0440\u043e\u0432 \u043a\u0440\u0438\u043f\u0442\u043e\u0433\u0440\u0430\u0444\u0438\u0447\u0435\u0441\u043a\u0438\u0445 \u043a\u043b\u044e\u0447\u0435\u0439 SKS Keyserver, \u043f\u043e\u0441\u0442\u0440\u043e\u0435\u043d\u043d\u0443\u044e \u043d\u0430 \u0431\u0430\u0437\u0435 \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u0430 OpenPGP. \u042d\u0442\u043e \u2014 \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442 IETF (RFC 4880), \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u0442\u0441\u044f [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":27422,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-36619","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.0.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0425\u0430\u043a\u0435\u0440\u044b \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043b\u0438 \u043e\u0441\u043e\u0431\u0435\u043d\u043d\u043e\u0441\u0442\u044c \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u0430 OpenPGP, \u043e 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