{"id":"CVE-2015-1788","url":"https://www.cyber-defence.io/tools/cve/CVE-2015-1788","generatedAt":"2026-11-05T06:13:11.221Z","title":"The BN_GF2m_mod_inv function in crypto/bn/bn_gf2m.c in OpenSSL before 0.9.8s, 1.0.0 before 1.0.0e, 1.0.1 before 1.0.1n, and 1.0.2 before 1.0.2b does not properly handle ECParameters structures in which the curve is over a malformed binary polynomial…","description":"The BN_GF2m_mod_inv function in crypto/bn/bn_gf2m.c in OpenSSL before 0.9.8s, 1.0.0 before 1.0.0e, 1.0.1 before 1.0.1n, and 1.0.2 before 1.0.2b does not properly handle ECParameters structures in which the curve is over a malformed binary polynomial field, which allows remote attackers to cause a denial of service (infinite loop) via a session that uses an Elliptic Curve algorithm, as demonstrated by an attack against a server that supports client authentication.","published":"2015-06-12T19:59:02.000Z","lastModified":"2026-06-17T00:23:00.000Z","status":"Modified","sourceIdentifier":"secalert@redhat.com","cvss":{"version":"2.0","score":4.3,"severity":"MEDIUM","vector":"AV:N/AC:M/Au:N/C:N/I:N/A:P"},"cwe":["CWE-399"],"affected":["openssl/openssl"],"epss":{"score":0.20513,"percentile":0.9752,"date":"2026-11-04","history":[{"date":"2026-10-22","score":0.20426,"percentile":0.97491}]},"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 20.5%, higher than 98% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"references":[{"url":"http://fortiguard.com/advisory/2015-07-09-cve-2015-1793-openssl-alternative-chains-certificate-forgery","source":"secalert@redhat.com"},{"url":"http://fortiguard.com/advisory/openssl-vulnerabilities-june-2015","source":"secalert@redhat.com"},{"url":"http://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2015-008.txt.asc","source":"secalert@redhat.com"},{"url":"http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10694","source":"secalert@redhat.com"},{"url":"http://lists.apple.com/archives/security-announce/2015/Aug/msg00001.html","source":"secalert@redhat.com"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2015-06/msg00023.html","source":"secalert@redhat.com"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2015-06/msg00024.html","source":"secalert@redhat.com"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2015-06/msg00026.html","source":"secalert@redhat.com"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00003.html","source":"secalert@redhat.com"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00004.html","source":"secalert@redhat.com"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00006.html","source":"secalert@redhat.com"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00007.html","source":"secalert@redhat.com"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00037.html","source":"secalert@redhat.com"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00011.html","source":"secalert@redhat.com"},{"url":"http://marc.info/?l=bugtraq&m=143880121627664&w=2","source":"secalert@redhat.com"},{"url":"http://marc.info/?l=bugtraq&m=144050155601375&w=2","source":"secalert@redhat.com"},{"url":"http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20150612-openssl","source":"secalert@redhat.com"},{"url":"http://www-304.ibm.com/support/docview.wss?uid=swg21960041","source":"secalert@redhat.com"},{"url":"http://www.debian.org/security/2015/dsa-3287","source":"secalert@redhat.com"},{"url":"http://www.fortiguard.com/advisory/2015-06-11-fortinet-vulnerability-openssl-vulnerabilities-june-2015","source":"secalert@redhat.com"},{"url":"http://www.fortiguard.com/advisory/openssl-vulnerabilities-june-2015","source":"secalert@redhat.com"},{"url":"http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html","source":"secalert@redhat.com"},{"url":"http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html","source":"secalert@redhat.com"},{"url":"http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html","source":"secalert@redhat.com"},{"url":"http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html","source":"secalert@redhat.com"},{"url":"http://www.oracle.com/technetwork/topics/security/bulletinjul2015-2511963.html","source":"secalert@redhat.com"},{"url":"http://www.oracle.com/technetwork/topics/security/cpujan2016-2367955.html","source":"secalert@redhat.com"},{"url":"http://www.oracle.com/technetwork/topics/security/cpuoct2015-2367953.html","source":"secalert@redhat.com"},{"url":"http://www.securityfocus.com/bid/75158","source":"secalert@redhat.com"},{"url":"http://www.securityfocus.com/bid/91787","source":"secalert@redhat.com"},{"url":"http://www.securitytracker.com/id/1032564","source":"secalert@redhat.com"},{"url":"http://www.ubuntu.com/usn/USN-2639-1","source":"secalert@redhat.com"},{"url":"https://bto.bluecoat.com/security-advisory/sa98","source":"secalert@redhat.com"},{"url":"https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf","source":"secalert@redhat.com"},{"url":"https://github.com/openssl/openssl/commit/4924b37ee01f71ae19c94a8934b80eeb2f677932","source":"secalert@redhat.com"},{"url":"https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05045763","source":"secalert@redhat.com"},{"url":"https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05131044","source":"secalert@redhat.com"},{"url":"https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05150888","source":"secalert@redhat.com"},{"url":"https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05158380","source":"secalert@redhat.com"},{"url":"https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05184351","source":"secalert@redhat.com"},{"url":"https://kc.mcafee.com/corporate/index?page=content&id=SB10122","source":"secalert@redhat.com"},{"url":"https://openssl.org/news/secadv/20150611.txt","source":"secalert@redhat.com"},{"url":"https://security.gentoo.org/glsa/201506-02","source":"secalert@redhat.com"},{"url":"https://support.apple.com/kb/HT205031","source":"secalert@redhat.com"},{"url":"https://support.citrix.com/article/CTX216642","source":"secalert@redhat.com"},{"url":"https://www.openssl.org/news/secadv_20150611.txt","tags":["Vendor Advisory"],"source":"secalert@redhat.com"},{"url":"http://fortiguard.com/advisory/2015-07-09-cve-2015-1793-openssl-alternative-chains-certificate-forgery","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://fortiguard.com/advisory/openssl-vulnerabilities-june-2015","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2015-008.txt.asc","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10694","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.apple.com/archives/security-announce/2015/Aug/msg00001.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2015-06/msg00023.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2015-06/msg00024.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2015-06/msg00026.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00003.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00004.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00006.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00007.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00037.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00011.html","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2015-1788","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."}