{"id":83443,"date":"2020-05-31T13:42:09","date_gmt":"2020-05-31T11:42:09","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/ustarevanie-kornevogo-sertifikata-addtrust-privelo-k-sboyam-v-sistemah-s-openssl-i-gnutls"},"modified":"2020-05-31T13:42:09","modified_gmt":"2020-05-31T11:42:09","slug":"ustarevanie-kornevogo-sertifikata-addtrust-privelo-k-sboyam-v-sistemah-s-openssl-i-gnutls","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/news\/ustarevanie-kornevogo-sertifikata-addtrust-privelo-k-sboyam-v-sistemah-s-openssl-i-gnutls","title":{"rendered":"Az AddTrust gy\u00f6k\u00e9rtan\u00fas\u00edtv\u00e1ny elavul\u00e1sa hib\u00e1kat okozott az OpenSSL \u00e9s GnuTLS rendszereiben.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>M\u00e1jus 30-\u00e1n lej\u00e1rt a 20 \u00e9ves gy\u00f6k\u00e9rtan\u00fas\u00edtv\u00e1ny \u00e9rv\u00e9nyess\u00e9ge. <noindex><a rel=\"nofollow\" href=\"https:\/\/crt.sh\/?id=1\">AddTrust<\/a><\/noindex>, ami <noindex><a rel=\"nofollow\" href=\"https:\/\/support.sectigo.com\/articles\/Knowledge\/Sectigo-AddTrust-External-CA-Root-Expiring-May-30-2020\">haszn\u00e1lt\u00e1k<\/a><\/noindex>  a legnagyobb tan\u00fas\u00edtv\u00e1nykiad\u00f3, a Sectigo (Comodo) \u00e1ltal kibocs\u00e1tott tan\u00fas\u00edtv\u00e1nyok keresztreferenci\u00e1hoz (cross-signed) val\u00f3 el\u0151\u00e1ll\u00edt\u00e1s\u00e1hoz. A keresztreferenci\u00e1s al\u00e1\u00edr\u00e1s lehet\u0151v\u00e9 tette a r\u00e9gebbi eszk\u00f6z\u00f6kkel val\u00f3 kompatibilit\u00e1st, amelyek gy\u00f6k\u00e9rtan\u00fas\u00edtv\u00e1ny-t\u00e1rol\u00f3j\u00e1ba nem ker\u00fclt be az \u00faj USERTrust gy\u00f6k\u00e9rtan\u00fas\u00edtv\u00e1ny. <\/p>\n<p><center><noindex><a rel=\"nofollow\" href=\"https:\/\/support.sectigo.com\/servlet\/rtaImage?eid=ka03l000000Y6d5&#038;feoid=00N1N00000Oytzq&#038;refid=0EM3l000002YZ1C\"><img decoding=\"async\" alt=\"Az AddTrust gy\u00f6k\u00e9rtan\u00fas\u00edtv\u00e1ny elavul\u00e1sa hib\u00e1kat okozott az OpenSSL \u00e9s GnuTLS rendszereiben.\" src=\"\/wp-content\/uploads\/2020\/05\/f5c4251fb99f51bb8ea11e7cd0a7acf5.png\" style=\"display:block;margin: 0 auto;\" \/><\/a><\/noindex><\/center><\/p>\n<p>Elm\u00e9letileg az AddTrust gy\u00f6k\u00e9rtan\u00fas\u00edtv\u00e1ny \u00e9rv\u00e9nytelenn\u00e9 v\u00e1l\u00e1s\u00e1nak csak az elavult rendszerekkel val\u00f3 kompatibilit\u00e1s megsz\u0171n\u00e9s\u00e9t kellett volna okoznia (Android 2.3, Windows XP, Mac OS X 10.11, iOS 9 stb.), mivel a keresztreferenci\u00e1s al\u00e1\u00edr\u00e1sban haszn\u00e1lt m\u00e1sodik gy\u00f6k\u00e9rtan\u00fas\u00edtv\u00e1ny tov\u00e1bbra is aktu\u00e1lis, \u00e9s a modern b\u00f6ng\u00e9sz\u0151k figyelembe veszik ezt a bizalmi l\u00e1nc ellen\u0151rz\u00e9se sor\u00e1n. A gyakorlatban <noindex><a rel=\"nofollow\" href=\"https:\/\/www.agwa.name\/blog\/post\/fixing_the_addtrust_root_expiration\">probl\u00e9m\u00e1k mer\u00fcltek fel<\/a><\/noindex> a keresztreferenci\u00e1s al\u00e1\u00edr\u00e1s ellen\u0151rz\u00e9s\u00e9vel a TLS-kliens b\u00f6ng\u00e9sz\u0151ket nem haszn\u00e1l\u00f3 alkalmaz\u00e1sokban, bele\u00e9rtve az OpenSSL 1.0.x \u00e9s GnuTLS alap\u00faakat is. A biztons\u00e1gos kapcsolat l\u00e9trehoz\u00e1sa nem val\u00f3sult meg, a tan\u00fas\u00edtv\u00e1ny elavul\u00e1s\u00e1ra hivatkoz\u00f3 hib\u00e1val, ha a szerveren AddTrust gy\u00f6k\u00e9rtan\u00fas\u00edtv\u00e1nnyal l\u00e1ncolt Sectigo tan\u00fas\u00edtv\u00e1nyt haszn\u00e1lnak.<\/p>\n<p>Ha a modern b\u00f6ng\u00e9sz\u0151k felhaszn\u00e1l\u00f3i nem \u00e9szlelt\u00e9k az AddTrust gy\u00f6k\u00e9rtan\u00fas\u00edtv\u00e1ny elavul\u00e1s\u00e1t a Sectigo keresztreferenci\u00e1s al\u00e1\u00edr\u00e1s\u00fa tan\u00fas\u00edtv\u00e1nyok feldolgoz\u00e1sa sor\u00e1n, k\u00fcl\u00f6nf\u00e9le harmadik f\u00e9lt\u0151l sz\u00e1rmaz\u00f3 alkalmaz\u00e1sokban \u00e9s szerver-oldali \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u0438ben probl\u00e9m\u00e1k jelentkeztek, ami a <noindex><a rel=\"nofollow\" href=\"https:\/\/twitter.com\/sleevi_\/status\/1266647545675210753\">a<\/a><\/noindex> <noindex><a rel=\"nofollow\" href=\"https:\/\/twitter.com\/__agwa\/timelines\/1266777818811322368\">m\u0171k\u00f6d\u00e9s<\/a><\/noindex> sok infrastrukt\u00fara eset\u00e9ben, amelyek titkos\u00edtott kommunik\u00e1ci\u00f3s csatorn\u00e1kat haszn\u00e1lnak az alkot\u00f3elemek k\u00f6z\u00f6tti kapcsolatban. <\/p>\n<p>P\u00e9ld\u00e1ul, probl\u00e9m\u00e1k l\u00e9ptek fel <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/jitsi\/jitsi-meet\/issues\/6918\">probl\u00e9ma<\/a><\/noindex> hozz\u00e1f\u00e9r\u00e9ssel n\u00e9h\u00e1ny csomagrepositoryhoz a Debian \u00e9s Ubuntu rendszerekben (az apt hiteles\u00edt\u00e9si hib\u00e1t kezdett kiadni), a folyamatok, amelyek sor\u00e1n a &#171;curl&#187; \u00e9s &#171;wget&#187; eszk\u00f6z\u00f6ket haszn\u00e1lj\u00e1k, hib\u00e1val z\u00e1rulnak, Git haszn\u00e1latakor hib\u00e1k figyelhet\u0151k meg. <noindex><a rel=\"nofollow\" href=\"https:\/\/support.roku.com\/en-gb\/article\/360049417393\">megszakadt<\/a><\/noindex> a Roku streaming platform m\u0171k\u00f6d\u00e9se, nem aktiv\u00e1l\u00f3dtak a <noindex><a rel=\"nofollow\" href=\"https:\/\/twitter.com\/stripestatus\/status\/1266756286734938116\">Stripe<\/a><\/noindex> \u00e9s <noindex><a rel=\"nofollow\" href=\"https:\/\/status.datadoghq.com\/incidents\/6bqpd511nj4h\">DataDog<\/a><\/noindex>, kezd\u0151dtek <noindex><a rel=\"nofollow\" href=\"https:\/\/status.heroku.com\/incidents\/2034\">\u00f6sszeoml\u00e1sok<\/a><\/noindex> a Heroku alkalmaz\u00e1sokban, <noindex><a rel=\"nofollow\" href=\"https:\/\/www.cmu.edu\/iso\/service\/cert-auth\/addtrust.html\">megsz\u0171nt<\/a><\/noindex> az OpenLDAP kliensek csatlakoz\u00e1sa, probl\u00e9m\u00e1k mer\u00fcltek fel az SMTPS \u00e9s SMTP szerverekkel val\u00f3 levelez\u00e9s k\u00fcld\u00e9s\u00e9ben STARTTLS seg\u00edts\u00e9g\u00e9vel. Ezen k\u00edv\u00fcl k\u00fcl\u00f6nf\u00e9le Ruby-, PHP- \u00e9s Python-szkriptekben, amelyek http-kliens modult haszn\u00e1lnak, probl\u00e9m\u00e1k l\u00e9ptek fel. A b\u00f6ng\u00e9sz\u0151k k\u00f6z\u00fcl a <noindex><a rel=\"nofollow\" href=\"https:\/\/gitlab.com\/gnutls\/gnutls\/-\/issues\/1008\">\u00e9rinti<\/a><\/noindex> Epiphany, amelyben nem t\u00f6lt\u0151dtek be a hirdet\u00e9sblokkol\u00f3 list\u00e1k.<\/p>\n<p>A Go nyelv\u0171 programok nem \u00e9rintettek a probl\u00e9m\u00e1ban, mivel a Go saj\u00e1t megval\u00f3s\u00edt\u00e1st k\u00edn\u00e1l <noindex><a rel=\"nofollow\" href=\"https:\/\/golang.org\/pkg\/crypto\/tls\/\">TLS-t.<\/a><\/noindex> \u00dagy v\u00e9lt\u00e9k,<\/p>\n<p><noindex><a rel=\"nofollow\" href=\"https:\/\/www.reddit.com\/r\/linux\/comments\/gshh70\/sectigo_root_ca_expiring_may_not_be_handled_well\/\">, hogy a probl\u00e9ma a r\u00e9gi kiad\u00e1sokra vonatkozik (bele\u00e9rtve a Debian 9, Ubuntu 16.04,<\/a><\/noindex>RHEL 6\/7 <noindex><a rel=\"nofollow\" href=\"https:\/\/bugzilla.redhat.com\/show_bug.cgi?id=1842174\">) amelyek a probl\u00e9m\u00e1s OpenSSL \u00e1gakat haszn\u00e1lj\u00e1k, de a probl\u00e9ma<\/a><\/noindex>megnyilv\u00e1nult <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/jitsi\/jitsi-meet\/issues\/6918\">az APT csomagkezel\u0151 m\u0171k\u00f6d\u00e9sekor a legfrissebb Debian 10 \u00e9s Ubuntu 18.04\/20.04 kiad\u00e1sokban, mivel az APT a GnuTLS k\u00f6nyvt\u00e1rat haszn\u00e1lja. A probl\u00e9ma l\u00e9nyege, hogy sok TLS\/SSL k\u00f6nyvt\u00e1r a tan\u00fas\u00edtv\u00e1nyt line\u00e1ris l\u00e1nck\u00e9nt \u00e9rtelmezi, mik\u00f6zben az RFC 4158 szerint a tan\u00fas\u00edtv\u00e1ny ir\u00e1ny\u00edtott elosztott ciklikus gr\u00e1fk\u00e9nt is megjelenhet t\u00f6bb megb\u00edzhat\u00f3s\u00e1gi gy\u00f6k\u00e9rrel, amelyeket figyelembe kell venni. E hi\u00e1nyoss\u00e1gr\u00f3l az OpenSSL \u00e9s GnuTLS<\/a><\/noindex> m\u00e1r \u00e9vek \u00f3ta <noindex><a rel=\"nofollow\" href=\"https:\/\/rt.openssl.org\/Ticket\/Display.html?user=guest&#038;pass=guest&#038;id=3359\">t\u00f6rt\u00e9nt<\/a><\/noindex> <noindex><a rel=\"nofollow\" href=\"https:\/\/bugs.launchpad.net\/ubuntu\/+source\/openssl\/+bug\/101464\">tudom\u00e1sunkra jutott<\/a><\/noindex> <noindex><a rel=\"nofollow\" href=\"https:\/\/bugzilla.redhat.com\/show_bug.cgi?id=1142137\">. Az OpenSSL-ben a probl\u00e9ma a 1.1.1 \u00e1gon lett megoldva, a<\/a><\/noindex>GnuTLS <noindex><a rel=\"nofollow\" href=\"https:\/\/www.gnutls.org\/\">jav\u00edtatlan.<\/a><\/noindex> marad  <noindex><a rel=\"nofollow\" href=\"https:\/\/gitlab.com\/gnutls\/gnutls\/-\/issues\/1008\">Mint megold\u00e1si lehet\u0151s\u00e9g a hiba elh\u00e1r\u00edt\u00e1s\u00e1ra, javasolt elt\u00e1vol\u00edtani a \"AddTrust External CA Root\" tan\u00fas\u00edtv\u00e1nyt a rendszer t\u00e1rol\u00f3j\u00e1b\u00f3l (p\u00e9ld\u00e1ul elt\u00e1vol\u00edtani a \/etc\/ca-certificates.conf-b\u00f3l \u00e9s \/etc\/ssl\/certs-b\u00f3l, majd futtatni az \"update-ca-certificates -f -v\" parancsot), ezut\u00e1n az OpenSSL norm\u00e1lisan kezdi kezelni a kereszttan\u00fas\u00edtv\u00e1nyokkal kapcsolatos tan\u00fas\u00edtv\u00e1nyokat. Az APT csomagkezel\u0151 haszn\u00e1latakor saj\u00e1t felel\u0151ss\u00e9gre lehets\u00e9ges a tan\u00fas\u00edtv\u00e1nyok ellen\u0151rz\u00e9s\u00e9nek lekapcsol\u00e1sa egyes k\u00e9r\u00e9sekhez (p\u00e9ld\u00e1ul: \"apt-get update -o Acquire::https::download.jitsi.org::Verify-Peer=false\").<\/a><\/noindex>.<\/p>\n<p>A hiba megker\u00fcl\u00e9s\u00e9re javasolt m\u00f3dszer a &#171;AddTrust External CA Root&#187; tan\u00fas\u00edtv\u00e1ny elt\u00e1vol\u00edt\u00e1sa a rendszer t\u00e1rol\u00f3b\u00f3l (p\u00e9ld\u00e1ul elt\u00e1vol\u00edtani a \/etc\/ca-certificates.conf \u00e9s \/etc\/ssl\/certs f\u00e1jlokb\u00f3l, majd futtatni az &#171;update-ca-certificates -f -v&#187; parancsot), ezt k\u00f6vet\u0151en az OpenSSL norm\u00e1lisan kezeli a keresztre f\u0171z\u00f6tt tan\u00fas\u00edtv\u00e1nyokat. Az APT csomagkezel\u0151 haszn\u00e1latakor a saj\u00e1t felel\u0151ss\u00e9g\u00e9re letilthatja a tan\u00fas\u00edtv\u00e1nyok ellen\u0151rz\u00e9s\u00e9t egyes k\u00e9r\u00e9sek eset\u00e9n (p\u00e9ld\u00e1ul &#171;apt-get update -o Acquire::https::download.jitsi.org::Verify-Peer=false&#187;). <\/p>\n<p>aj\u00e1nlott a AddTrust tan\u00fas\u00edtv\u00e1ny feketelist\u00e1ra helyez\u00e9se: <noindex><a rel=\"nofollow\" href=\"https:\/\/bugzilla.redhat.com\/show_bug.cgi?id=1842178\">Fedora<\/a><\/noindex> \u00e9s <noindex><a rel=\"nofollow\" href=\"https:\/\/bugzilla.redhat.com\/show_bug.cgi?id=1842174\">RHEL<\/a><\/noindex> trust dump \u2014filter \"pkcs11:id=;type=cert\" \\<\/p>\n<p>   bizalom dump \u2014filter \u00abpkcs11:id=;type=cert\u00bb \\<br \/>\n      update-ca-trust extract<br \/>\n   De ez a m\u00f3dszer<\/p>\n<p>a GnuTLS sz\u00e1m\u00e1ra (p\u00e9ld\u00e1ul a wget seg\u00e9dprogram futtat\u00e1sakor tov\u00e1bbra is tan\u00fas\u00edtv\u00e1ny-ellen\u0151rz\u00e9si hib\u00e1t jelez). <noindex><a rel=\"nofollow\" href=\"https:\/\/twitter.com\/ChristianHeimes\/status\/1266800555978039296\">nem m\u0171k\u00f6dik<\/a><\/noindex> A szerver oldal\u00e1n<\/p>\n<p>meg lehet v\u00e1ltoztatni <noindex><a rel=\"nofollow\" href=\"https:\/\/www.cmu.edu\/iso\/service\/cert-auth\/addtrust.html\">a tan\u00fas\u00edtv\u00e1nyok sorrendj\u00e9t a bizalmi l\u00e1ncban, amelyet a szerver k\u00fcld a kliensnek (ha a \"AddTrust External CA Root\" tan\u00fas\u00edtv\u00e1nyt elt\u00e1vol\u00edtj\u00e1k a list\u00e1b\u00f3l, akkor a kliens sikeresen ellen\u0151rzi). Az \u00faj bizalmi l\u00e1nc ellen\u0151rz\u00e9s\u00e9hez \u00e9s gener\u00e1l\u00e1s\u00e1hoz haszn\u00e1lhat\u00f3 a<\/a><\/noindex> <noindex><a rel=\"nofollow\" href=\"https:\/\/ohdear.app\/blog\/resolving-the-addtrust-external-ca-root-certificate-expiration\">whatsmychaincert.com<\/a><\/noindex> a szerver \u00e1ltal az \u00fcgyf\u00e9lnek k\u00fcld\u00f6tt bizalmi l\u00e1ncban l\u00e9v\u0151 tan\u00fas\u00edtv\u00e1nyok felsorol\u00e1sa (ha az &#171;AddTrust External CA Root&#187; tan\u00fas\u00edtv\u00e1nyt elt\u00e1vol\u00edtj\u00e1k a list\u00e1b\u00f3l, az \u00fcgyf\u00e9l \u00e1tvizsg\u00e1l\u00e1sa sikeresen v\u00e9gbemegy). Egy \u00faj bizalmi l\u00e1nc ellen\u0151rz\u00e9s\u00e9re \u00e9s gener\u00e1l\u00e1s\u00e1ra haszn\u00e1lhat egy szolg\u00e1ltat\u00e1st <noindex><a rel=\"nofollow\" href=\"https:\/\/whatsmychaincert.com\/\">ny\u00fajtott<\/a><\/noindex>alternat\u00edv kereszttan\u00fas\u00edtv\u00e1nyt \" <noindex><a rel=\"nofollow\" href=\"https:\/\/support.sectigo.com\/articles\/Knowledge\/Sectigo-AddTrust-External-CA-Root-Expiring-May-30-2020\">AAA Certificate Services<\/a><\/noindex> alternat\u00edv keresztre f\u0171z\u00f6tt k\u00f6zbens\u0151 tan\u00fas\u00edtv\u00e1ny &#171;<noindex><a rel=\"nofollow\" href=\"https:\/\/crt.sh\/?id=331986\">Kieg\u00e9sz\u00edt\u00e9s: A probl\u00e9ma a LibreSSL-ben is<\/a><\/noindex>&#171;, amely 2028-ig \u00e9rv\u00e9nyes lesz, \u00e9s lehet\u0151v\u00e9 teszi a r\u00e9gebbi oper\u00e1ci\u00f3s rendszerek verzi\u00f3ival val\u00f3 kompatibilit\u00e1s meg\u0151rz\u00e9s\u00e9t.<\/p>\n<p>. <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/libressl-portable\/portable\/issues\/595\">manifests<\/a><\/noindex> .<\/p>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Forr\u00e1s: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=53061\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>30 \u043c\u0430\u044f \u0438\u0441\u0442\u0451\u043a 20-\u043b\u0435\u0442\u043d\u0438\u0439 \u0441\u0440\u043e\u043a \u0434\u0435\u0439\u0441\u0442\u0432\u0438\u044f \u043a\u043e\u0440\u043d\u0435\u0432\u043e\u0433\u043e \u0441\u0435\u0440\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u0430 AddTrust, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u043b\u0441\u044f \u0434\u043b\u044f \u0444\u043e\u0440\u043c\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u043f\u0435\u0440\u0435\u043a\u0440\u0451\u0441\u0442\u043d\u043e\u0439 \u043f\u043e\u0434\u043f\u0438\u0441\u0438 (cross-signed) \u0432 \u0441\u0435\u0440\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u0430\u0445 \u043e\u0434\u043d\u043e\u0433\u043e \u0438\u0437 \u043a\u0440\u0443\u043f\u043d\u0435\u0439\u0448\u0438\u0445 \u0443\u0434\u043e\u0441\u0442\u043e\u0432\u0435\u0440\u044f\u044e\u0449\u0438\u0445 \u0446\u0435\u043d\u0442\u0440\u043e\u0432 Sectigo (Comodo). \u041f\u0435\u0440\u0435\u043a\u0440\u0451\u0441\u0442\u043d\u0430\u044f \u043f\u043e\u0434\u043f\u0438\u0441\u044c \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u043b\u0430 \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0438\u0442\u044c \u0441\u043e\u0432\u043c\u0435\u0441\u0442\u0438\u043c\u043e\u0441\u0442\u044c \u0441 \u0443\u0441\u0442\u0430\u0440\u0435\u0432\u0448\u0438\u043c\u0438 \u0443\u0441\u0442\u0440\u043e\u0439\u0441\u0442\u0432\u0430\u043c\u0438, \u0432 \u0445\u0440\u0430\u043d\u0438\u043b\u0438\u0449\u0435 \u043a\u043e\u0440\u043d\u0435\u0432\u044b\u0445 \u0441\u0435\u0440\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0432 \u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u043d\u0435 \u0431\u044b\u043b \u0434\u043e\u0431\u0430\u0432\u043b\u0435\u043d \u043d\u043e\u0432\u044b\u0439 \u043a\u043e\u0440\u043d\u0435\u0432\u043e\u0439 \u0441\u0435\u0440\u0442\u0438\u0444\u0438\u043a\u0430\u0442 USERTRust. \u0422\u0435\u043e\u0440\u0435\u0442\u0438\u0447\u0435\u0441\u043a\u0438 \u043f\u0440\u0435\u043a\u0440\u0430\u0449\u0435\u043d\u0438\u0435 \u0434\u0435\u0439\u0441\u0442\u0432\u0438\u044f \u043a\u043e\u0440\u043d\u0435\u0432\u043e\u0433\u043e \u0441\u0435\u0440\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u0430 AddTrust \u0434\u043e\u043b\u0436\u043d\u043e \u0431\u044b\u043b\u043e \u043f\u0440\u0438\u0432\u0435\u0441\u0442\u0438 \u043b\u0438\u0448\u044c 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