{"id":"CVE-2018-0732","revision":null,"records":[{"revision":"42da285bea3d4f518dcb3aa88dd8072b","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2018-0732","aliases":[],"title":"Client DoS due to large DH parameter","description":"During key agreement in a TLS handshake using a DH(E) based ciphersuite a malicious server can send a very large prime value to the client. This will cause the client to spend an unreasonably long period of time generating a key for this prime resulting in a hang until the client has finished. This could be exploited in a Denial Of Service attack. Fixed in OpenSSL 1.1.0i-dev (Affected 1.1.0-1.1.0h). Fixed in OpenSSL 1.0.2p-dev (Affected 1.0.2-1.0.2o).","state":0,"publishedAt":"2018-06-12T13:00:00+00:00","modifiedAt":"2026-10-08T21:13:55.704+00:00","affected":[{"ecosystem":"Vendor product","name":"OpenSSL","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"OpenSSL\",\n                    \"vendor\": \"OpenSSL\",\n                    \"versions\": [\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"Fixed in OpenSSL 1.1.0i-dev (Affected 1.1.0-1.1.0h)\"\n                        },\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"Fixed in OpenSSL 1.0.2p-dev (Affected 1.0.2-1.0.2o)\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://lists.debian.org/debian-lts-announce/2018/07/msg00043.html","http://www.securityfocus.com/bid/104442","https://www.debian.org/security/2018/dsa-4355","https://access.redhat.com/errata/RHSA-2018:2552","https://security.gentoo.org/glsa/201811-03","https://usn.ubuntu.com/3692-2/","https://access.redhat.com/errata/RHSA-2018:2553","https://access.redhat.com/errata/RHSA-2018:3505","https://usn.ubuntu.com/3692-1/","https://access.redhat.com/errata/RHSA-2018:3221","https://www.debian.org/security/2018/dsa-4348","http://www.securitytracker.com/id/1041090","https://access.redhat.com/errata/RHSA-2019:1297","https://access.redhat.com/errata/RHSA-2019:1296","https://access.redhat.com/errata/RHSA-2019:1543","https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EWC42UXL5GHTU5G77VKBF6JYUUNGSHOM/","https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZBEV5QGDRFUZDMNECFXUSN5FMYOZDE4V/","https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Y3IVFGSERAZLNJCK35TEM2R4726XIH3Z/","https://www.oracle.com/security-alerts/cpuapr2020.html","http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html","https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html","https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html","https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html","https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html","https://www.oracle.com/security-alerts/cpujan2021.html","https://www.tenable.com/security/tns-2018-14","https://securityadvisories.paloaltonetworks.com/Home/Detail/133","https://www.tenable.com/security/tns-2018-13","https://www.tenable.com/security/tns-2018-17","https://www.tenable.com/security/tns-2018-12","https://security.netapp.com/advisory/ntap-20181105-0001/","https://nodejs.org/en/blog/vulnerability/august-2018-security-releases/","https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=3984ef0b72831da8b3ece4745cac4f8575b19098","https://www.openssl.org/news/secadv/20180612.txt","https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=ea7abeeabf92b7aca160bdd0208636d4da69f4f4","https://security.netapp.com/advisory/ntap-20190118-0002/","https://cert-portal.siemens.com/productcert/pdf/ssa-419820.pdf"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2018-0732","license":"CVE Program Terms of Use","key":"cve-program:CVE-2018-0732","identifiers":["CVE-2018-0732"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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