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).
CVE-2018-0732
“▲” beside the score: it is higher than NVD's CVSS score.
Score elevated to 8.0 because EPSS predicted 48% probability of exploitation within the next 30 days (98th percentile of EPSS-scored CVEs) when EchelonGraph scored this CVE. NVD baseline CVSS 7.5 retained for reference. Confidence: see factors.
- High severity, but no confirmed exploitation yet
A fix is available — apply it.
- CVSS v3
- 7.5
- EG Score
- 8.0HIGHhigh confidence
- EG Risk
- 68EG Risk 68/100
EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.
How it’s computed (value × EchelonGraph’s weight)Severity75% × 45%Impact severity (EG Severity): CVSS 7.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.Exploitation48% × 40%FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.Automatability100% × 15%CISA's SSVC Automatable value: yes (Vulnrichment).SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high. - EPSS PROB
- 48%
- EPSS %ILE
- 98th
- KEV
- Not listed
What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)
The EG score (8.0): severity, escalated by confirmed exploitation. This CVE's 8.0 is EPSS's lift toward 9.0 from its impact severity (EG Severity, CVSS 7.5 HIGH): a likelihood of exploitation, not impact.
- EG Severity
- 7.5 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
- EG Likelihood
- 48% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-21). FIRST's exploitation probability, not an EchelonGraph model.
- Confirmed exploitation
- None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
- EG Priority
- SSVC Track at medium mission impactTrack at low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; 60 days if it is not.Each input and its source: the SSVC and BOD 26-04 blocks below.
SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).
A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table
BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; 60 days if it is not.
In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it
Published
June 12, 2018
Last Modified
October 8, 2026
Advisory Details (7)
Auto-updated Oct 8, 2026Affected: Red Hat Enterprise Linux 7.
https://access.redhat.com/errata/RHSA-2018:3221OpenSSL: Denial of service (GLSA 201811-03) — Gentoo security
https://security.gentoo.org/glsa/201811-03[SECURITY] [DSA 4355-1] openssl1.0 security update
https://www.debian.org/security/2018/dsa-4355[SECURITY] [DLA 1449-1] openssl security update
https://lists.debian.org/debian-lts-announce/2018/07/msg00043.htmlVendor Advisories for CVE-2018-0732(6)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
- GHSA-497c-86pp-222mGitHub Security AdvisoriesHigh
During key agreement in a TLS handshake using a DH(E) based ciphersuite a malicious server can...
- RHSA-2019:1543Red Hat Product SecurityHigh
Red Hat Security Advisory: Red Hat JBoss Core Services Apache HTTP Server 2.4.29 SP2 security update
- RHSA-2019:1297Red Hat Product SecurityHigh
Red Hat Security Advisory: Red Hat JBoss Core Services Apache HTTP Server 2.4.29 SP2 security update
- RHSA-2019:1296Red Hat Product SecurityHigh
Red Hat Security Advisory: Red Hat JBoss Core Services Apache HTTP Server 2.4.29 SP2 security update
- RHSA-2018:3221Red Hat Product SecurityMedium
Red Hat Security Advisory: openssl security, bug fix, and enhancement update
- PAN-SA-2018-0015Palo Alto Networks Security AdvisoriesHigh
PAN-SA-2018-0015 OpenSSL Vulnerabilities in PAN-OS
Patch Availability(8)
| Vendor / Ecosystem | Fix (by version range) / Patch | Released | Source |
|---|---|---|---|
| ubuntu | openssl (1.0.2g-1ubuntu4.13) @ xenial | 2026-10-21 | ubuntu |
| ubuntu | libssl1.0.0 (1.0.1-4ubuntu5.43) @ precise | 2026-10-21 | ubuntu |
| redhat | openssl | 2019-06-18 | redhat |
| redhat | patch | 2019-05-30 | redhat |
| redhat | jbcs-httpd24-openssl-1:1.0.2n-15.jbcs.el7 | 2019-05-30 | redhat |
| redhat | openssl-1:1.0.2k-16.el7 | 2018-10-30 | redhat |
| redhat | rhoar-nodejs-1:10.9.0-1.el7 | 2018-08-22 | redhat |
| redhat | rhoar-nodejs-1:8.11.4-2.el7 | 2018-08-22 | redhat |
Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.
Affected Packages
(20 across 17 ecosystems)
Alpine:v3.7(2)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| libressl | — |
| — |
| openssl | — |
| — |
Alpine:v3.8(2)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| libressl | — |
| — |
| openssl | — |
| — |
Debian:9(2)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| openssl | 1.1.0f-3 ... 1.1.0h-4 (12 versions) |
| — |
| openssl1.0 | 1.0.2l-2 ... 1.0.2o-1+riscv64 (11 versions) |
| — |
Alpine:v3.10(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| libressl | — |
| — |
Alpine:v3.11(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| libressl | — |
| — |
Alpine:v3.12(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| libressl | — |
| — |
Alpine:v3.13(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| libressl | — |
| — |
Alpine:v3.3(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| openssl | — |
| — |
Alpine:v3.4(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| openssl | — |
| — |
Alpine:v3.5(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| openssl | — |
| — |
Alpine:v3.6(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| openssl | — |
| — |
Alpine:v3.9(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| libressl | — |
| — |
Debian:11(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| openssl | — |
| — |
Debian:12(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| openssl | — |
| — |
Debian:13(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| openssl | — |
| — |
Debian:14(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| openssl | — |
| — |
Debian:8(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| openssl | 1.0.1k-3 ... 1.0.1t-1+deb8u8 (15 versions) |
| — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Additional Vendor Advisories
(4)
Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.
Data Freshness Timeline
(refreshed 9× in last 7d / 33× in last 30d)
Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.
Showing the most recent 88 of 121 refreshes on record for this CVE.
A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 12 repeat rows among the latest 100 are merged into the row they repeat. The 33 oldest rows on record are not shown and were not checked, so the counts can still include repeats.
- 2026-10-22 16:27 UTCEPSS rescoreEPSS 48% · 98th percentile
- 2026-10-21 23:51 UTCEG score recompute
- 2026-10-21 23:51 UTCVendor advisory
- 2026-10-21 23:51 UTCGHSA enrichmentGHSA-497c-86pp-222m · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-21 16:27 UTCEPSS rescoreEPSS 48% · 98th percentile
- 2026-10-20 16:27 UTCEPSS rescoreEPSS 48% · 98th percentile
- 2026-10-19 16:26 UTCEPSS rescoreEPSS 48% · 98th percentile
- 2026-10-18 16:27 UTCEPSS rescoreEPSS 49% · 98th percentile
- 2026-10-18 10:24 UTCEG score recompute
- 2026-10-16 16:29 UTCEPSS rescoreEPSS 49% · 98th percentile
- 2026-10-15 16:27 UTCEPSS rescoreEPSS 49% · 98th percentile
- 2026-10-14 16:27 UTCEPSS rescoreEPSS 49% · 98th percentile
- 2026-10-13 16:27 UTCEPSS rescoreEPSS 49% · 98th percentile
- 2026-10-12 20:23 UTCEG score recompute
- 2026-10-12 16:28 UTCEPSS rescoreEPSS 49% · 98th percentile
- 2026-10-12 00:46 UTCEG score recompute
- 2026-10-11 13:41 UTCEPSS rescoreEPSS 49% · 98th percentile
- 2026-10-10 19:55 UTCEPSS rescoreEPSS 49% · 98th percentile
- 2026-10-09 20:02 UTCEPSS rescoreEPSS 49% · 98th percentile
- 2026-10-08 22:31 UTCVendor advisory
- 2026-10-08 22:31 UTCGHSA enrichmentGHSA-497c-86pp-222m · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-08 21:35 UTCEG score recompute
- 2026-10-08 21:35 UTCVendor advisory
- 2026-10-08 21:35 UTCGHSA enrichmentGHSA-497c-86pp-222m · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-07 23:41 UTCEPSS rescoreEPSS 49% · 98th percentile
Show 63 moreShow fewer
- 2026-10-06 15:12 UTCEPSS rescoreEPSS 49% · 98th percentile
- 2026-10-04 23:18 UTCEPSS rescoreEPSS 49% · 98th percentile
- 2026-09-30 14:59 UTCEPSS rescoreEPSS 49% · 98th percentile
- 2026-09-30 09:50 UTCEG score recompute
- 2026-09-29 02:08 UTCOSV refresh
- 2026-09-27 13:40 UTCEPSS rescoreEPSS 49% · 98th percentile
- 2026-09-26 15:53 UTCEPSS rescoreEPSS 49% · 98th percentile
- 2026-09-24 13:59 UTCEPSS rescoreEPSS 49% · 98th percentile
- 2026-09-23 13:42 UTCEPSS rescoreEPSS 49% · 98th percentile
- 2026-09-21 20:27 UTCEPSS rescoreEPSS 49% · 98th percentile
- 2026-09-19 15:36 UTCEPSS rescoreEPSS 49% · 98th percentile
- 2026-09-17 19:22 UTCEPSS rescoreEPSS 49% · 98th percentile
- 2026-09-15 03:05 UTCEPSS rescoreEPSS 49% · 98th percentile
- 2026-09-12 14:56 UTCEPSS rescoreEPSS 49% · 98th percentile
- 2026-09-09 07:10 UTCOSV refresh
- 2026-09-05 15:24 UTCEPSS rescoreEPSS 49% · 98th percentile
- 2026-09-04 13:56 UTCEPSS rescoreEPSS 49% · 98th percentile
- 2026-09-04 05:02 UTCEPSS rescoreEPSS 49% · 98th percentile
- 2026-09-02 14:07 UTCEPSS rescoreEPSS 49% · 98th percentile
- 2026-09-01 03:31 UTCEPSS rescoreEPSS 49% · 98th percentile
- 2026-08-30 19:13 UTCEPSS rescoreEPSS 49% · 98th percentile
- 2026-08-28 21:36 UTCEPSS rescoreEPSS 49% · 98th percentile
- 2026-08-26 14:41 UTCEPSS rescoreEPSS 49% · 98th percentile
- 2026-08-25 13:44 UTCEPSS rescoreEPSS 49% · 98th percentile
- 2026-08-22 15:07 UTCOSV refresh
- 2026-08-21 23:44 UTCEPSS rescoreEPSS 49% · 98th percentile
- 2026-08-19 16:59 UTCEPSS rescoreEPSS 49% · 98th percentile
- 2026-08-18 13:43 UTCEPSS rescoreEPSS 49% · 98th percentile
- 2026-08-16 14:51 UTCEPSS rescoreEPSS 49% · 98th percentile
- 2026-08-16 02:10 UTCEPSS rescoreEPSS 49% · 98th percentile
- 2026-08-15 01:26 UTCEPSS rescoreEPSS 49% · 98th percentile
- 2026-08-12 13:46 UTCEPSS rescoreEPSS 49% · 98th percentile
- 2026-08-08 16:32 UTCEPSS rescoreEPSS 49% · 98th percentile
- 2026-08-06 19:05 UTCOSV refresh
- 2026-08-06 13:42 UTCEPSS rescoreEPSS 49% · 98th percentile
- 2026-08-01 04:12 UTCEPSS rescoreEPSS 49% · 98th percentile
- 2026-07-30 16:24 UTCEPSS rescoreEPSS 49% · 98th percentile
- 2026-07-30 01:26 UTCEPSS rescoreEPSS 49% · 98th percentile
- 2026-07-28 15:32 UTCEPSS rescoreEPSS 49% · 98th percentile
- 2026-07-26 14:51 UTCEPSS rescoreEPSS 49% · 98th percentile
- 2026-07-23 14:15 UTCEPSS rescoreEPSS 49% · 98th percentile
- 2026-07-23 01:31 UTCEG score recompute▲ 0.50
- 2026-07-22 22:11 UTCEG score recompute
- 2026-07-22 14:04 UTCEPSS rescoreEPSS 49% · 98th percentile
- 2026-07-21 15:21 UTCEPSS rescoreEPSS 49% · 98th percentile
- 2026-07-21 11:17 UTCOSV refresh
- 2026-07-20 17:04 UTCEPSS rescoreEPSS 49% · 98th percentile
- 2026-07-19 02:26 UTCEPSS rescoreEPSS 49% · 98th percentile
- 2026-07-16 16:59 UTCEPSS rescoreEPSS 49% · 98th percentile
- 2026-07-15 16:54 UTCEPSS rescoreEPSS 49% · 98th percentile
- 2026-07-13 22:26 UTCEPSS rescoreEPSS 49% · 98th percentile
- 2026-07-11 08:24 UTCEPSS rescoreEPSS 49% · 98th percentile
- 2026-07-09 19:06 UTCEPSS rescoreEPSS 49% · 98th percentile
- 2026-07-07 13:42 UTCEPSS rescoreEPSS 49% · 98th percentile
- 2026-07-05 02:27 UTCEPSS rescoreEPSS 49% · 98th percentile
- 2026-07-04 06:56 UTCOSV refresh
- 2026-07-02 16:54 UTCEPSS rescoreEPSS 49% · 98th percentile
- 2026-07-01 15:03 UTCEPSS rescoreEPSS 49% · 98th percentile
- 2026-06-29 14:03 UTCEPSS rescoreEPSS 49% · 98th percentile
- 2026-06-28 04:53 UTCEPSS rescoreEPSS 49% · 98th percentile
- 2026-06-27 03:06 UTCEPSS rescoreEPSS 49% · 98th percentile
- 2026-06-25 13:47 UTCEPSS rescoreEPSS 49% · 98th percentile
- 2026-06-24 14:02 UTCEPSS rescoreEPSS 49% · 98th percentile
Related CVEs(same product + same vendor + same CWE)
Same product
10 shownAlpine:v3.10:libressl · Debian:9:openssl · Debian:9:openssl1.0
- CVE-2017-8301EG 5.3MEDIUM
- CVE-2018-0495EG 4.7MEDIUM
- CVE-2018-0739EG 6.5EPSS p97MEDIUM
- CVE-2018-0737EG 5.9EPSS p96MEDIUM
- CVE-2017-3735EG 5.3EPSS p98MEDIUM
- CVE-2018-5407EG 4.7MEDIUM
- CVE-2018-0734EG 5.9EPSS p96MEDIUM
- CVE-2017-3737NVD 5.9EG 8.6EPSS p100HIGH
- CVE-2017-3736EG 6.5EPSS p96MEDIUM
- CVE-2017-3738EG 5.9EPSS p96MEDIUM
Same vendor
10 shownredhat:RHSA-2018:3221 · redhat:RHSA-2019:1296 · redhat:RHSA-2018:2552
- CVE-2018-0495EG 4.7MEDIUM
- CVE-2019-0211NVD 7.8EG 9.0 KEVEPSS p99CRITICAL
- CVE-2018-0737EG 5.9EPSS p96MEDIUM
- CVE-2018-12115EG 7.5EPSS p95HIGH
- CVE-2019-3822EG 9.8EPSS p96CRITICAL
- CVE-2018-16840EG 9.8CRITICAL
- CVE-2018-16839NVD 4.3EG 9.8EPSS p93CRITICAL
- CVE-2018-1000120EG 9.8EPSS p96CRITICAL
- CVE-2018-1000007EG 9.8EPSS p94CRITICAL
- CVE-2018-16842NVD 4.4EG 9.1CRITICAL
Frequently asked(5)
What is CVE-2018-0732?
When was CVE-2018-0732 made public?
Is CVE-2018-0732 actively exploited?
What is the CVSS score of CVE-2018-0732?
How do I remediate CVE-2018-0732?
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2018-0732
Is Your Infrastructure Affected by CVE-2018-0732?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.