CVE-2018-0732
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).
Published at
2018-06-12T13:29Z
2154 days ago
Modified
2022-08-16T13:00Z
628 days ago
CWE-320
Problem type
Impact
- CVSS v3 vector string
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Severity Score Vector
7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HReferences
GET https://vulnerabilitydata.com/api/details/CVE-2018-0732
{
"id": "CVE-2018-0732",
"published_date": "2018-06-12T13:29Z",
"last_modified_date": "2022-08-16T13:00Z",
"assigner": "openssl-security@openssl.org",
"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).",
"references": [
{
"url": "https://www.openssl.org/news/secadv/20180612.txt",
"name": "https://www.openssl.org/news/secadv/20180612.txt",
"refsource": "CONFIRM",
"tags": [
"Vendor Advisory"
]
},
{
"url": "https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=ea7abeeabf92b7aca160bdd0208636d4da69f4f4",
"name": "https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=ea7abeeabf92b7aca160bdd0208636d4da69f4f4",
"refsource": "CONFIRM",
"tags": [
"Patch",
"Third Party Advisory"
]
},
{
"url": "https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=3984ef0b72831da8b3ece4745cac4f8575b19098",
"name": "https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=3984ef0b72831da8b3ece4745cac4f8575b19098",
"refsource": "CONFIRM",
"tags": [
"Patch",
"Third Party Advisory"
]
},
{
"url": "http://www.securitytracker.com/id/1041090",
"name": "1041090",
"refsource": "SECTRACK",
"tags": [
"Third Party Advisory",
"VDB Entry"
]
},
{
"url": "http://www.securityfocus.com/bid/104442",
"name": "104442",
"refsource": "BID",
"tags": [
"Third Party Advisory",
"VDB Entry"
]
},
{
"url": "https://usn.ubuntu.com/3692-2/",
"name": "USN-3692-2",
"refsource": "UBUNTU",
"tags": [
"Third Party Advisory"
]
},
{
"url": "https://usn.ubuntu.com/3692-1/",
"name": "USN-3692-1",
"refsource": "UBUNTU",
"tags": [
"Third Party Advisory"
]
},
{
"url": "https://lists.debian.org/debian-lts-announce/2018/07/msg00043.html",
"name": "[debian-lts-announce] 20180728 [SECURITY] [DLA 1449-1] openssl security update",
"refsource": "MLIST",
"tags": [
"Third Party Advisory"
]
},
{
"url": "https://access.redhat.com/errata/RHSA-2018:2553",
"name": "RHSA-2018:2553",
"refsource": "REDHAT",
"tags": [
"Third Party Advisory"
]
},
{
"url": "https://access.redhat.com/errata/RHSA-2018:2552",
"name": "RHSA-2018:2552",
"refsource": "REDHAT",
"tags": [
"Third Party Advisory"
]
},
{
"url": "https://nodejs.org/en/blog/vulnerability/august-2018-security-releases/",
"name": "https://nodejs.org/en/blog/vulnerability/august-2018-security-releases/",
"refsource": "CONFIRM",
"tags": [
"Vendor Advisory"
]
},
{
"url": "https://www.tenable.com/security/tns-2018-12",
"name": "https://www.tenable.com/security/tns-2018-12",
"refsource": "CONFIRM",
"tags": [
"Third Party Advisory"
]
},
{
"url": "https://securityadvisories.paloaltonetworks.com/Home/Detail/133",
"name": "https://securityadvisories.paloaltonetworks.com/Home/Detail/133",
"refsource": "CONFIRM",
"tags": [
"Third Party Advisory"
]
},
{
"url": "http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html",
"name": "http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html",
"refsource": "CONFIRM",
"tags": [
"Patch",
"Third Party Advisory"
]
},
{
"url": "https://www.tenable.com/security/tns-2018-14",
"name": "https://www.tenable.com/security/tns-2018-14",
"refsource": "CONFIRM",
"tags": [
"Third Party Advisory"
]
},
{
"url": "https://www.tenable.com/security/tns-2018-13",
"name": "https://www.tenable.com/security/tns-2018-13",
"refsource": "CONFIRM",
"tags": [
"Third Party Advisory"
]
},
{
"url": "https://access.redhat.com/errata/RHSA-2018:3221",
"name": "RHSA-2018:3221",
"refsource": "REDHAT",
"tags": [
"Third Party Advisory"
]
},
{
"url": "https://security.netapp.com/advisory/ntap-20181105-0001/",
"name": "https://security.netapp.com/advisory/ntap-20181105-0001/",
"refsource": "CONFIRM",
"tags": [
"Third Party Advisory"
]
},
{
"url": "https://access.redhat.com/errata/RHSA-2018:3505",
"name": "RHSA-2018:3505",
"refsource": "REDHAT",
"tags": [
"Third Party Advisory"
]
},
{
"url": "https://security.gentoo.org/glsa/201811-03",
"name": "GLSA-201811-03",
"refsource": "GENTOO",
"tags": [
"Third Party Advisory"
]
},
{
"url": "https://www.debian.org/security/2018/dsa-4348",
"name": "DSA-4348",
"refsource": "DEBIAN",
"tags": [
"Third Party Advisory"
]
},
{
"url": "https://www.debian.org/security/2018/dsa-4355",
"name": "DSA-4355",
"refsource": "DEBIAN",
"tags": [
"Third Party Advisory"
]
},
{
"url": "https://www.tenable.com/security/tns-2018-17",
"name": "https://www.tenable.com/security/tns-2018-17",
"refsource": "CONFIRM",
"tags": [
"Third Party Advisory"
]
},
{
"url": "https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html",
"name": "https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html",
"refsource": "CONFIRM",
"tags": [
"Patch",
"Third Party Advisory"
]
},
{
"url": "https://security.netapp.com/advisory/ntap-20190118-0002/",
"name": "https://security.netapp.com/advisory/ntap-20190118-0002/",
"refsource": "CONFIRM",
"tags": [
"Third Party Advisory"
]
},
{
"url": "https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html",
"name": "https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html",
"refsource": "MISC",
"tags": [
"Patch",
"Third Party Advisory"
]
},
{
"url": "https://access.redhat.com/errata/RHSA-2019:1297",
"name": "RHSA-2019:1297",
"refsource": "REDHAT",
"tags": [
"Third Party Advisory"
]
},
{
"url": "https://access.redhat.com/errata/RHSA-2019:1296",
"name": "RHSA-2019:1296",
"refsource": "REDHAT",
"tags": [
"Third Party Advisory"
]
},
{
"url": "https://access.redhat.com/errata/RHSA-2019:1543",
"name": "RHSA-2019:1543",
"refsource": "REDHAT",
"tags": [
"Third Party Advisory"
]
},
{
"url": "https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html",
"name": "https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html",
"refsource": "MISC",
"tags": [
"Patch",
"Third Party Advisory"
]
},
{
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/EWC42UXL5GHTU5G77VKBF6JYUUNGSHOM/",
"name": "FEDORA-2019-db06efdea1",
"refsource": "FEDORA",
"tags": [
"Mailing List",
"Third Party Advisory"
]
},
{
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZBEV5QGDRFUZDMNECFXUSN5FMYOZDE4V/",
"name": "FEDORA-2019-00c25b9379",
"refsource": "FEDORA",
"tags": [
"Mailing List",
"Third Party Advisory"
]
},
{
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/Y3IVFGSERAZLNJCK35TEM2R4726XIH3Z/",
"name": "FEDORA-2019-9a0a7c0986",
"refsource": "FEDORA",
"tags": [
"Third Party Advisory"
]
},
{
"url": "https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html",
"name": "https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html",
"refsource": "MISC",
"tags": [
"Patch",
"Third Party Advisory"
]
},
{
"url": "https://www.oracle.com/security-alerts/cpuapr2020.html",
"name": "N/A",
"refsource": "N/A",
"tags": [
"Third Party Advisory"
]
},
{
"url": "https://www.oracle.com/security-alerts/cpujan2021.html",
"name": "https://www.oracle.com/security-alerts/cpujan2021.html",
"refsource": "MISC",
"tags": [
"Third Party Advisory"
]
},
{
"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-419820.pdf",
"name": "https://cert-portal.siemens.com/productcert/pdf/ssa-419820.pdf",
"refsource": "CONFIRM",
"tags": [
"Third Party Advisory"
]
}
],
"impact": {
"baseMetricV3": {
"cvssV3": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"attackVector": "NETWORK",
"attackComplexity": "LOW",
"privilegesRequired": "NONE",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH"
},
"exploitabilityScore": 3.9,
"impactScore": 3.6
},
"baseMetricV2": {
"cvssV2": {
"version": "2.0",
"vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
"accessVector": "NETWORK",
"accessComplexity": "LOW",
"authentication": "NONE",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"availabilityImpact": "PARTIAL",
"baseScore": 5
},
"severity": "MEDIUM",
"exploitabilityScore": 10,
"impactScore": 2.9,
"obtainAllPrivilege": false,
"obtainUserPrivilege": false,
"obtainOtherPrivilege": false,
"userInteractionRequired": false
}
},
"problem_type": "CWE-320"
}