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Vulnerability details: VCID-hex2-3uv8-2ybn
Vulnerability ID VCID-hex2-3uv8-2ybn
Aliases CVE-2018-0732
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).
Status Published
Exploitability 0.5
Weighted Severity 6.8
Risk 3.4
Affected and Fixed Packages Package Details
Weaknesses (2)
CWE-320 Key Management Errors
CWE-325 Missing Cryptographic Step
System Score Found at
cvssv3 4.3 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-0732.json
epss 0.50927 https://api.first.org/data/v1/epss?cve=CVE-2018-0732
epss 0.77935 https://api.first.org/data/v1/epss?cve=CVE-2018-0732
epss 0.77935 https://api.first.org/data/v1/epss?cve=CVE-2018-0732
epss 0.77935 https://api.first.org/data/v1/epss?cve=CVE-2018-0732
epss 0.77935 https://api.first.org/data/v1/epss?cve=CVE-2018-0732
epss 0.77935 https://api.first.org/data/v1/epss?cve=CVE-2018-0732
epss 0.77935 https://api.first.org/data/v1/epss?cve=CVE-2018-0732
epss 0.77935 https://api.first.org/data/v1/epss?cve=CVE-2018-0732
epss 0.77935 https://api.first.org/data/v1/epss?cve=CVE-2018-0732
cvssv3 5.3 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 5.0 https://nvd.nist.gov/vuln/detail/CVE-2018-0732
cvssv3.1 7.5 https://nvd.nist.gov/vuln/detail/CVE-2018-0732
archlinux Low https://security.archlinux.org/AVG-674
archlinux Low https://security.archlinux.org/AVG-675
Reference id Reference type URL
https://access.redhat.com/errata/RHSA-2018:2552
https://access.redhat.com/errata/RHSA-2018:2553
https://access.redhat.com/errata/RHSA-2018:3221
https://access.redhat.com/errata/RHSA-2018:3505
https://access.redhat.com/errata/RHSA-2019:1543
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-0732.json
https://api.first.org/data/v1/epss?cve=CVE-2018-0732
https://cert-portal.siemens.com/productcert/pdf/ssa-419820.pdf
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-0732
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-0734
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-0735
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-0737
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-5407
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=3984ef0b72831da8b3ece4745cac4f8575b19098
https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=ea7abeeabf92b7aca160bdd0208636d4da69f4f4
https://lists.debian.org/debian-lts-announce/2018/07/msg00043.html
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/Y3IVFGSERAZLNJCK35TEM2R4726XIH3Z/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZBEV5QGDRFUZDMNECFXUSN5FMYOZDE4V/
https://nodejs.org/en/blog/vulnerability/august-2018-security-releases/
https://securityadvisories.paloaltonetworks.com/Home/Detail/133
https://security.gentoo.org/glsa/201811-03
https://security.netapp.com/advisory/ntap-20181105-0001/
https://www.debian.org/security/2018/dsa-4348
https://www.debian.org/security/2018/dsa-4355
https://www.openssl.org/news/secadv/20180612.txt
https://www.oracle.com/security-alerts/cpuapr2020.html
https://www.oracle.com/security-alerts/cpujan2021.html
https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html
https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html
https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html
https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html
https://www.tenable.com/security/tns-2018-12
https://www.tenable.com/security/tns-2018-13
https://www.tenable.com/security/tns-2018-14
https://www.tenable.com/security/tns-2018-17
http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html
http://www.securityfocus.com/bid/104442
http://www.securitytracker.com/id/1041090
1591100 https://bugzilla.redhat.com/show_bug.cgi?id=1591100
AVG-674 https://security.archlinux.org/AVG-674
AVG-675 https://security.archlinux.org/AVG-675
cpe:2.3:a:nodejs:node.js:*:*:*:*:-:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:nodejs:node.js:*:*:*:*:-:*:*:*
cpe:2.3:a:nodejs:node.js:*:*:*:*:lts:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:nodejs:node.js:*:*:*:*:lts:*:*:*
cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
CVE-2018-0732 https://nvd.nist.gov/vuln/detail/CVE-2018-0732
RHSA-2019:1296 https://access.redhat.com/errata/RHSA-2019:1296
RHSA-2019:1297 https://access.redhat.com/errata/RHSA-2019:1297
USN-3692-1 https://usn.ubuntu.com/3692-1/
USN-3692-2 https://usn.ubuntu.com/3692-2/
No exploits are available.
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-0732.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2018-0732
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2018-0732
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.9778
EPSS Score 0.50927
Published At Aug. 3, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:29:03.317848+00:00 Alpine Linux Importer Import https://secdb.alpinelinux.org/v3.10/main.json 37.0.0