{"id":"CVE-2017-3730","url":"https://www.cyber-defence.io/tools/cve/CVE-2017-3730","generatedAt":"2026-10-29T00:59:24.341Z","title":"In OpenSSL 1.1.0 before 1.1.0d, if a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash.","description":"In OpenSSL 1.1.0 before 1.1.0d, if a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack.","published":"2017-05-04T19:29:00.000Z","lastModified":"2026-06-17T01:18:48.000Z","status":"Modified","sourceIdentifier":"openssl-security@openssl.org","cvss":{"version":"3.0","score":7.5,"severity":"HIGH","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"cwe":["CWE-476"],"affected":["openssl/openssl","oracle/agile engineering data management","oracle/communications application session controller","oracle/communications eagle lnp application processor","oracle/communications operations monitor","oracle/jd edwards enterpriseone tools","oracle/jd edwards world security"],"epss":{"score":0.55294,"percentile":0.99025,"date":"2026-10-27","history":[{"date":"2026-09-21","score":0.49872,"percentile":0.98879},{"date":"2026-09-22","score":0.55294,"percentile":0.98986}]},"kev":{"listed":false},"exploits":{"count":1,"verified":false,"firstPublished":"2017-01-26","source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[{"edbId":41192,"kind":"exploit","title":"OpenSSL 1.1.0 - Remote Client Denial of Service","url":"https://www.exploit-db.com/exploits/41192","sourceUrl":"https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/multiple/dos/41192.c","file":"exploits/multiple/dos/41192.c","published":"2017-01-26","added":"2017-01-30","updated":"2017-01-30","author":"Guido Vranken","type":"dos","platform":"multiple","port":null,"verified":false,"codes":["CVE-2017-3730"],"tags":null,"aliases":null,"applicationUrl":null,"screenshotUrl":null,"referenceUrl":"https://github.com/guidovranken/CVE-2017-3730/blob/98cca4c8c706c6b3ff8b6f2fc9fb2e8c956f3263/crash-postfix.c"}]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 55.3%, higher than 99% of all known CVEs. Patch or mitigate before the next change window."},"changes":[{"kind":"epss","label":"EPSS jump","at":"2026-09-22T00:00:00.000Z","detail":{"to":0.55294,"from":0.49872,"percentile":0.98986},"summary":"EPSS moved from 49.9% to 55.3% probability of exploitation in the next thirty days."}],"references":[{"url":"http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html","tags":["Patch"],"source":"openssl-security@openssl.org"},{"url":"http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html","tags":["Patch"],"source":"openssl-security@openssl.org"},{"url":"http://www.securityfocus.com/bid/95812","tags":["Broken Link","Third Party Advisory","VDB Entry"],"source":"openssl-security@openssl.org"},{"url":"http://www.securitytracker.com/id/1037717","tags":["Third Party Advisory","VDB Entry"],"source":"openssl-security@openssl.org"},{"url":"https://github.com/openssl/openssl/commit/efbe126e3ebb9123ac9d058aa2bb044261342aaa","tags":["Patch","Third Party Advisory"],"source":"openssl-security@openssl.org"},{"url":"https://security.gentoo.org/glsa/201702-07","tags":["Third Party Advisory"],"source":"openssl-security@openssl.org"},{"url":"https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03838en_us","tags":["Third Party Advisory"],"source":"openssl-security@openssl.org"},{"url":"https://www.exploit-db.com/exploits/41192/","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"openssl-security@openssl.org"},{"url":"https://www.openssl.org/news/secadv/20170126.txt","tags":["Patch","Vendor Advisory"],"source":"openssl-security@openssl.org"},{"url":"https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html","tags":["Patch"],"source":"openssl-security@openssl.org"},{"url":"http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/bid/95812","tags":["Broken Link","Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securitytracker.com/id/1037717","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/openssl/openssl/commit/efbe126e3ebb9123ac9d058aa2bb044261342aaa","tags":["Patch","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.gentoo.org/glsa/201702-07","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03838en_us","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.exploit-db.com/exploits/41192/","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.openssl.org/news/secadv/20170126.txt","tags":["Patch","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2017-3730","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}