{"id":"CVE-2015-3193","url":"https://www.cyber-defence.io/tools/cve/CVE-2015-3193","generatedAt":"2026-11-05T05:51:08.156Z","title":"The Montgomery squaring implementation in crypto/bn/asm/x86_64-mont5.pl in OpenSSL 1.0.2 before 1.0.2e on the x86_64 platform, as used by the BN_mod_exp function, mishandles carry propagation and produces incorrect output, which makes it easier for…","description":"The Montgomery squaring implementation in crypto/bn/asm/x86_64-mont5.pl in OpenSSL 1.0.2 before 1.0.2e on the x86_64 platform, as used by the BN_mod_exp function, mishandles carry propagation and produces incorrect output, which makes it easier for remote attackers to obtain sensitive private-key information via an attack against use of a (1) Diffie-Hellman (DH) or (2) Diffie-Hellman Ephemeral (DHE) ciphersuite.","published":"2015-12-06T20:59:03.000Z","lastModified":"2026-06-17T00:25:31.000Z","status":"Modified","sourceIdentifier":"secalert@redhat.com","cvss":{"version":"3.1","score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"},"cwe":["CWE-200"],"affected":["openssl/openssl","nodejs/node.js","canonical/ubuntu linux"],"epss":{"score":0.25137,"percentile":0.97938,"date":"2026-11-04","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 25.1%, higher than 98% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"references":[{"url":"http://fortiguard.com/advisory/openssl-advisory-december-2015","tags":["Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10759","tags":["Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10761","tags":["Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://openssl.org/news/secadv/20151203.txt","tags":["Vendor Advisory"],"source":"secalert@redhat.com"},{"url":"http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20151204-openssl","tags":["Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://www.fortiguard.com/advisory/openssl-advisory-december-2015","tags":["Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://www.oracle.com/technetwork/security-advisory/cpuapr2016v3-2985753.html","tags":["Patch","Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html","tags":["Patch","Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html","tags":["Patch","Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://www.securityfocus.com/bid/78705","tags":["Third Party Advisory","VDB Entry"],"source":"secalert@redhat.com"},{"url":"http://www.securityfocus.com/bid/91787","tags":["Third Party Advisory","VDB Entry"],"source":"secalert@redhat.com"},{"url":"http://www.securitytracker.com/id/1034294","tags":["Third Party Advisory","VDB Entry"],"source":"secalert@redhat.com"},{"url":"http://www.slackware.com/security/viewer.php?l=slackware-security&y=2015&m=slackware-security.539966","tags":["Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://www.slackware.com/security/viewer.php?l=slackware-security&y=2015&m=slackware-security.754583","tags":["Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://www.ubuntu.com/usn/USN-2830-1","tags":["Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"https://blog.fuzzing-project.org/31-Fuzzing-Math-miscalculations-in-OpenSSLs-BN_mod_exp-CVE-2015-3193.html","tags":["Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1288317","tags":["Issue Tracking","Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf","source":"secalert@redhat.com"},{"url":"https://git.openssl.org/?p=openssl.git%3Ba=commit%3Bh=d73cc256c8e256c32ed959456101b73ba9842f72","source":"secalert@redhat.com"},{"url":"https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05398322","tags":["Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"https://kb.isc.org/article/AA-01438","tags":["Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA40100","tags":["Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://fortiguard.com/advisory/openssl-advisory-december-2015","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10759","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10761","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://openssl.org/news/secadv/20151203.txt","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20151204-openssl","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.fortiguard.com/advisory/openssl-advisory-december-2015","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.oracle.com/technetwork/security-advisory/cpuapr2016v3-2985753.html","tags":["Patch","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html","tags":["Patch","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html","tags":["Patch","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/bid/78705","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/bid/91787","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securitytracker.com/id/1034294","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.slackware.com/security/viewer.php?l=slackware-security&y=2015&m=slackware-security.539966","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.slackware.com/security/viewer.php?l=slackware-security&y=2015&m=slackware-security.754583","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.ubuntu.com/usn/USN-2830-1","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://blog.fuzzing-project.org/31-Fuzzing-Math-miscalculations-in-OpenSSLs-BN_mod_exp-CVE-2015-3193.html","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1288317","tags":["Issue Tracking","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.openssl.org/?p=openssl.git%3Ba=commit%3Bh=d73cc256c8e256c32ed959456101b73ba9842f72","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05398322","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://kb.isc.org/article/AA-01438","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA40100","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2015-3193","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."}