CVE-2018-0732 (GCVE-0-2018-0732)
Vulnerability from cvelistv5
Published
2018-06-12 13:00
Modified
2026-10-08 21:13
Severity ?
CWE
  • Client side Denial of Service
Summary
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).
References
https://lists.debian.org/debian-lts-announce/2018/07/msg00043.html mailing-list, x_refsource_MLIST
http://www.securityfocus.com/bid/104442 vdb-entry, x_refsource_BID
https://www.debian.org/security/2018/dsa-4355 vendor-advisory, x_refsource_DEBIAN
https://access.redhat.com/errata/RHSA-2018:2552 vendor-advisory, x_refsource_REDHAT
https://security.gentoo.org/glsa/201811-03 vendor-advisory, x_refsource_GENTOO
https://usn.ubuntu.com/3692-2/ vendor-advisory, x_refsource_UBUNTU
https://access.redhat.com/errata/RHSA-2018:2553 vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2018:3505 vendor-advisory, x_refsource_REDHAT
https://usn.ubuntu.com/3692-1/ vendor-advisory, x_refsource_UBUNTU
https://access.redhat.com/errata/RHSA-2018:3221 vendor-advisory, x_refsource_REDHAT
https://www.debian.org/security/2018/dsa-4348 vendor-advisory, x_refsource_DEBIAN
http://www.securitytracker.com/id/1041090 vdb-entry, x_refsource_SECTRACK
https://access.redhat.com/errata/RHSA-2019:1297 vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:1296 vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:1543 vendor-advisory, x_refsource_REDHAT
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EWC42UXL5GHTU5G77VKBF6JYUUNGSHOM/ vendor-advisory, x_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZBEV5QGDRFUZDMNECFXUSN5FMYOZDE4V/ vendor-advisory, x_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Y3IVFGSERAZLNJCK35TEM2R4726XIH3Z/ vendor-advisory, x_refsource_FEDORA
https://www.oracle.com/security-alerts/cpuapr2020.html x_refsource_MISC
http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html x_refsource_CONFIRM
https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html x_refsource_CONFIRM
https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html x_refsource_MISC
https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html x_refsource_MISC
https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html x_refsource_MISC
https://www.oracle.com/security-alerts/cpujan2021.html x_refsource_MISC
https://www.tenable.com/security/tns-2018-14 x_refsource_CONFIRM
https://securityadvisories.paloaltonetworks.com/Home/Detail/133 x_refsource_CONFIRM
https://www.tenable.com/security/tns-2018-13 x_refsource_CONFIRM
https://www.tenable.com/security/tns-2018-17 x_refsource_CONFIRM
https://www.tenable.com/security/tns-2018-12 x_refsource_CONFIRM
https://security.netapp.com/advisory/ntap-20181105-0001/ x_refsource_CONFIRM
https://nodejs.org/en/blog/vulnerability/august-2018-security-releases/ x_refsource_CONFIRM
https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=3984ef0b72831da8b3ece4745cac4f8575b19098 x_refsource_CONFIRM
https://www.openssl.org/news/secadv/20180612.txt x_refsource_CONFIRM
https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=ea7abeeabf92b7aca160bdd0208636d4da69f4f4 x_refsource_CONFIRM
https://security.netapp.com/advisory/ntap-20190118-0002/ x_refsource_CONFIRM
https://cert-portal.siemens.com/productcert/pdf/ssa-419820.pdf x_refsource_CONFIRM
Impacted products
Vendor Product Version
OpenSSL OpenSSL Version: Fixed in OpenSSL 1.1.0i-dev (Affected 1.1.0-1.1.0h)
Version: Fixed in OpenSSL 1.0.2p-dev (Affected 1.0.2-1.0.2o)
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      "cveMetadata": "{\"cveId\": \"CVE-2018-0732\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-10-08T21:13:55.704Z\", \"dateReserved\": \"2017-11-30T00:00:00.000Z\", \"assignerOrgId\": \"3a12439a-ef3a-4c79-92e6-6081a721f1e5\", \"datePublished\": \"2018-06-12T13:00:00.000Z\", \"assignerShortName\": \"openssl\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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