{"id":34976,"date":"2019-10-31T22:01:37","date_gmt":"2019-10-31T19:01:37","guid":{"rendered":"https:\/\/prohoster.info\/blog\/okolo-5-5-vyyavlyaemyh-uyazvimostej-ispolzuyutsya-dlya-osushhestvleniya-atak\/"},"modified":"2019-10-31T22:01:37","modified_gmt":"2019-10-31T19:01:37","slug":"okolo-5-5-vyyavlyaemyh-uyazvimostej-ispolzuyutsya-dlya-osushhestvleniya-atak","status":"publish","type":"post","link":"https:\/\/prohoster.info\/da\/blog\/news\/okolo-5-5-vyyavlyaemyh-uyazvimostej-ispolzuyutsya-dlya-osushhestvleniya-atak","title":{"rendered":"Cirka 5,5% af de identificerede s\u00e5rbarheder bruges til at udf\u00f8re angreb","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

En gruppe forskere fra Virginia Polytechnic Institute samt virksomhederne Cyentia og RAND, offentliggjorde<\/a><\/noindex> resultaterne af analysen af risici ved anvendelse af forskellige strategier til at rette s\u00e5rbarheder. Ved at unders\u00f8ge 76.000 s\u00e5rbarheder fundet fra 2009 til 2018, blev det konstateret, at kun 4183 af dem (5,5%) blev brugt til at udf\u00f8re reelle angreb. Det opn\u00e5ede niveau er fem gange h\u00f8jere end tidligere offentliggjorte prognoser, hvor antallet af udnyttede problemer blev vurderet til ca. 1,4%.<\/p>\n

Der blev dog ikke fundet nogen korrelation mellem offentligg\u00f8relsen af prototype-exploits i det \u00e5bne rum og fors\u00f8get p\u00e5 at udnytte s\u00e5rbarheden. Af alle de kendte tilf\u00e6lde af udnyttelse af s\u00e5rbarheder var det kun i halvdelen af tilf\u00e6ldene, at der f\u00f8r dette blev offentliggjort en prototype-exploit i \u00e5bne kilder. Manglen p\u00e5 en prototype-exploit stopper ikke angriberne, som om n\u00f8dvendigt skaber exploits selv.<\/p>\n

Andre konklusioner viser, at s\u00e5rbarheder, der vurderes med et h\u00f8jt fare niveau if\u00f8lge CVSS, hovedsageligt eftersp\u00f8rges til udnyttelse. I n\u00e6sten halvdelen af angrebene blev der anvendt s\u00e5rbarheder med en score p\u00e5 mindst 9. <\/p>\n

Det samlede antal offentliggjorte prototype-exploits i den betragtede periode er vurderet til 9726. De data om exploits, der blev anvendt i unders\u00f8gelsen, er fra
\nsamlinger fra Exploit DB, Metasploit, D2 Security\u2019s Elliot Kit, Canvas Exploitation Framework, Contagio, Reversing Labs og Secureworks CTU.
\nInformation om s\u00e5rbarheder blev indhentet fra databasen NIST NVD<\/a><\/noindex> (National Vulnerability Database). Oplysninger om udnyttelsesfejl er sammenfattet baseret p\u00e5 information fra FortiGuard Labs, SANS Internet Storm Center, Secureworks CTU, Alienvault\u2019s OSSIM og ReversingLabs.<\/p>\n

Unders\u00f8gelsen blev gennemf\u00f8rt med henblik p\u00e5 at finde den optimale balance mellem anvendelsen af opdateringer ved opdagelse af s\u00e5rbarheder og udbedringen af kun de mest kritiske problemer. I det f\u00f8rste tilf\u00e6lde sikres en h\u00f8jere effektivitet af beskyttelsen, men der kr\u00e6ves store ressourcer til vedligeholdelse af infrastrukturen, som prim\u00e6rt bruges p\u00e5 at rette ubetydelige problemer. I det andet tilf\u00e6lde er der stor risiko for at overse en s\u00e5rbarhed, der kan udnyttes til et angreb. Unders\u00f8gelsen viste, at n\u00e5r der tr\u00e6ffes beslutning om installation af en opdatering, der fjerner en s\u00e5rbarhed, b\u00f8r man ikke stole p\u00e5 frav\u00e6ret af en offentliggjort exploit prototype, og chancen for udnyttelse afh\u00e6nger direkte af s\u00e5rbarhedens alvorlighed.<\/p>\n

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

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

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\u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439. \u0418\u0437\u0443\u0447\u0438\u0432 76 \u0442\u044b\u0441\u044f\u0447 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439, \u043d\u0430\u0439\u0434\u0435\u043d\u043d\u044b\u0445 \u0441 2009 \u043f\u043e 2018 \u0433\u043e\u0434, \u0431\u044b\u043b\u043e \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u043e, \u0447\u0442\u043e \u0442\u043e\u043b\u044c\u043a\u043e 4183 \u0438\u0437 \u043d\u0438\u0445 (5.5%) \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u043b\u0438\u0441\u044c \u0434\u043b\u044f \u043e\u0441\u0443\u0449\u0435\u0441\u0442\u0432\u043b\u0435\u043d\u0438\u044f \u0440\u0435\u0430\u043b\u044c\u043d\u044b\u0445 \u0430\u0442\u0430\u043a. \u041f\u043e\u043b\u0443\u0447\u0435\u043d\u043d\u044b\u0439 \u043f\u043e\u043a\u0430\u0437\u0430\u0442\u0435\u043b\u044c \u0432 \u043f\u044f\u0442\u044c \u0440\u0430\u0437 \u043f\u0440\u0435\u0432\u044b\u0448\u0430\u0435\u0442 \u0440\u0430\u043d\u0435\u0435 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