Client DoS due to large DH parameter

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Summary

CVECVE-2018-0732
StatePUBLISHED
Assigneropenssl
Source PriorityCVE Program / NVD first with legacy fallback
Published2018-06-12 13:29:00 UTC
Updated2026-10-08 22:16:42 UTC
DescriptionDuring 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).

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Problem Types: CWE-320 | Client side Denial of Service

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
2.0[email protected]Primary5AV:N/AC:L/Au:N/C:N/I:N/A:P

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v2.0 Breakdown

Access Vector
Network
Access Complexity
Low
Authentication
None
Confidentiality
None
Integrity
None
Availability
Partial

AV:N/AC:L/Au:N/C:N/I:N/A:P

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Canonical Ubuntu Linux 12.04 All All All
Operating System Canonical Ubuntu Linux 14.04 All All All
Operating System Canonical Ubuntu Linux 16.04 All All All
Operating System Canonical Ubuntu Linux 17.10 All All All
Operating System Canonical Ubuntu Linux 18.04 All All All
Operating System Debian Debian Linux 8.0 All All All
Application Nodejs Node.js All All All All
Application Nodejs Node.js All All All All
Application Openssl Openssl All All All All
Application Openssl Openssl All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA OpenSSL OpenSSL affected Fixed in OpenSSL 1.1.0i-dev (Affected 1.1.0-1.1.0h) Not specified
CNA OpenSSL OpenSSL affected Fixed in OpenSSL 1.0.2p-dev (Affected 1.0.2-1.0.2o) Not specified

References

ReferenceSourceLinkTags
[R1] Nessus 8.0.0 Fixes Multiple Third-party Vulnerabilities - Security Advisory | Tenable® af854a3a-2127-422b-91ae-364da2661108 www.tenable.com Third Party Advisory
CPU Oct 2018 af854a3a-2127-422b-91ae-364da2661108 www.oracle.com Patch, Third Party Advisory
www.openssl.org/news/secadv/20180612.txt af854a3a-2127-422b-91ae-364da2661108 www.openssl.org Vendor Advisory
[SECURITY] Fedora 30 Update: compat-openssl10-1.0.2o-7.fc30 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
git.openssl.org Git - openssl.git/commitdiff af854a3a-2127-422b-91ae-364da2661108 git.openssl.org
January 2019 MySQL Vulnerabilities in NetApp Products | NetApp Product Security af854a3a-2127-422b-91ae-364da2661108 security.netapp.com Third Party Advisory
CVE-2018-0732 OpenSSL Vulnerability in NetApp Products | NetApp Product Security af854a3a-2127-422b-91ae-364da2661108 security.netapp.com Third Party Advisory
git.openssl.org Git - openssl.git/commitdiff af854a3a-2127-422b-91ae-364da2661108 git.openssl.org
USN-3692-1: OpenSSL vulnerabilities | Ubuntu security notices af854a3a-2127-422b-91ae-364da2661108 usn.ubuntu.com Third Party Advisory
Oracle Critical Patch Update - July 2019 af854a3a-2127-422b-91ae-364da2661108 www.oracle.com Patch, Third Party Advisory
Oracle Critical Patch Update Advisory - January 2021 af854a3a-2127-422b-91ae-364da2661108 www.oracle.com Third Party Advisory
[SECURITY] Fedora 29 Update: compat-openssl10-1.0.2o-7.fc29 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
Red Hat Customer Portal af854a3a-2127-422b-91ae-364da2661108 access.redhat.com Third Party Advisory
Oracle Critical Patch Update - January 2019 af854a3a-2127-422b-91ae-364da2661108 www.oracle.com Patch, Third Party Advisory
August 2018 Security Releases | Node.js af854a3a-2127-422b-91ae-364da2661108 nodejs.org Vendor Advisory
Red Hat Customer Portal af854a3a-2127-422b-91ae-364da2661108 access.redhat.com Third Party Advisory
Red Hat Customer Portal af854a3a-2127-422b-91ae-364da2661108 access.redhat.com Third Party Advisory
Red Hat Customer Portal af854a3a-2127-422b-91ae-364da2661108 access.redhat.com Third Party Advisory
[SECURITY] Fedora 31 Update: compat-openssl10-1.0.2o-8.fc31 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
PAN-SA-2018-0015 OpenSSL Vulnerabilities in PAN-OS af854a3a-2127-422b-91ae-364da2661108 securityadvisories.paloaltonetworks.com Third Party Advisory
OpenSSL DH Parameter Processing Lets Remote Servers Deny Service on Connected Clients - SecurityTracker af854a3a-2127-422b-91ae-364da2661108 www.securitytracker.com Third Party Advisory, VDB Entry
Oracle Critical Patch Update - October 2019 af854a3a-2127-422b-91ae-364da2661108 www.oracle.com Patch, Third Party Advisory
Red Hat Customer Portal af854a3a-2127-422b-91ae-364da2661108 access.redhat.com Third Party Advisory
USN-3692-2: OpenSSL vulnerabilities | Ubuntu security notices af854a3a-2127-422b-91ae-364da2661108 usn.ubuntu.com Third Party Advisory
Debian -- Security Information -- DSA-4348-1 openssl af854a3a-2127-422b-91ae-364da2661108 www.debian.org Third Party Advisory
[R1] LCE 5.1.1 Fixes Multiple Third-party Vulnerabilities - Security Advisory | Tenable® af854a3a-2127-422b-91ae-364da2661108 www.tenable.com Third Party Advisory
Oracle Critical Patch Update Advisory - April 2020 af854a3a-2127-422b-91ae-364da2661108 www.oracle.com Third Party Advisory
[R1] Nessus 7.1.4 Fixes Multiple Third-party Vulnerabilities - Security Advisory | Tenable® af854a3a-2127-422b-91ae-364da2661108 www.tenable.com Third Party Advisory
Red Hat Customer Portal af854a3a-2127-422b-91ae-364da2661108 access.redhat.com Third Party Advisory
Red Hat Customer Portal af854a3a-2127-422b-91ae-364da2661108 access.redhat.com Third Party Advisory
Debian -- Security Information -- DSA-4355-1 openssl1.0 af854a3a-2127-422b-91ae-364da2661108 www.debian.org Third Party Advisory
Oracle Critical Patch Update Advisory - April 2019 af854a3a-2127-422b-91ae-364da2661108 www.oracle.com Patch, Third Party Advisory
OpenSSL: Denial of Service (GLSA 201811-03) — Gentoo security af854a3a-2127-422b-91ae-364da2661108 security.gentoo.org Third Party Advisory
[SECURITY] [DLA 1449-1] openssl security update af854a3a-2127-422b-91ae-364da2661108 lists.debian.org Third Party Advisory
OpenSSL CVE-2018-0732 Denial of Service Vulnerability af854a3a-2127-422b-91ae-364da2661108 www.securityfocus.com Third Party Advisory, VDB Entry
cert-portal.siemens.com/productcert/pdf/ssa-419820.pdf af854a3a-2127-422b-91ae-364da2661108 cert-portal.siemens.com Third Party Advisory
[R1] SecurityCenter 5.7.1 Fixes Multiple Third-Party Vulnerabilities - Security Advisory | Tenable® af854a3a-2127-422b-91ae-364da2661108 www.tenable.com Third Party Advisory
git.openssl.org Git - openssl.git/commitdiff MITRE git.openssl.org
git.openssl.org Git - openssl.git/commitdiff MITRE git.openssl.org
[SECURITY] Fedora 30 Update: compat-openssl10-1.0.2o-7.fc30 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
[SECURITY] Fedora 29 Update: compat-openssl10-1.0.2o-7.fc29 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
[SECURITY] Fedora 31 Update: compat-openssl10-1.0.2o-8.fc31 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Guido Vranken (en)

Legacy QID Mappings

  • 390226 Oracle Managed Virtualization (VM) Server for x86 Security Update for Open Secure Sockets Layer (OpenSSL) (OVMSA-2021-0011)
  • 390284 Oracle Managed Virtualization (VM) Server for x86 Security Update for Open Secure Sockets Layer (OpenSSL) (OVMSA-2023-0013)
  • 500368 Alpine Linux Security Update for libressl
  • 590699 Siemens TIM 1531 IRC Vulnerability (ICSA-21-159-08)
  • 591115 ABB Relion 670 series and Relion 650 series Open Secure Sockets Layer (OpenSSL) Multiple Vulnerabilities (ABBVU-PGGA-1MRG032388)
  • 670784 EulerOS Security Update for shim (EulerOS-SA-2021-2542)
  • 670808 EulerOS Security Update for shim (EulerOS-SA-2021-2566)
  • 690588 Free Berkeley Software Distribution (FreeBSD) Security Update for Open Secure Sockets Layer (OpenSSL) (c82ecac5-6e3f-11e8-8777-b499baebfeaf)
  • 710295 Gentoo Linux Open Secure Sockets Layer Denial of service Vulnerability (GLSA 201811-03)

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