CVE & CISA-KEV Catalog

CVE-2018-0732

HIGHEPSS 99th pctl
7.5
CVSS v3
NVD

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).

CWE-320

How to fix

Remediation Available
opensslDebian
Fixed in:1.1.1-1CVE-2018-0732
Fixed in:1.1.1-1CVE-2018-0732
Fixed in:1.1.1-1CVE-2018-0732
Fixed in:1.1.1-1CVE-2018-0732
libssl1.0.0Ubuntu
Fixed in:1.0.1f-1ubuntu2.26USN-3692-1
Fixed in:1.0.2g-1ubuntu4.13USN-3692-1
Fixed in:1.0.2n-1ubuntu5.1USN-3692-1
libssl1.1Ubuntu
Fixed in:1.1.0g-2ubuntu4.1USN-3692-1
opensslUbuntu
Fixed in:1.0.1f-1ubuntu2.26USN-3692-1
Fixed in:1.0.2g-1ubuntu4.13USN-3692-1
Fixed in:1.1.0g-2ubuntu4.1USN-3692-1
openssl1.0Ubuntu
Fixed in:1.0.2n-1ubuntu5.1USN-3692-1
Node.jsWindows application
Affected:10.0.0 10.9.0Fixed in:10.9.0Node.js Foundation
Affected:8.0.0 8.8.1Fixed in:8.8.1Node.js Foundation
Affected:8.9.0 8.11.4Fixed in:8.11.4Node.js Foundation
Affected:6.0.0 6.8.1Fixed in:6.8.1Node.js Foundation
Affected:6.9.0 6.14.4Fixed in:6.14.4Node.js Foundation
Node.js (LTS)Windows application
Affected:6.9.0 6.14.4Fixed in:6.14.4Node.js Foundation
Affected:6.0.0 6.8.1Fixed in:6.8.1Node.js Foundation
Affected:8.0.0 8.8.1Fixed in:8.8.1Node.js Foundation
Affected:10.0.0 10.9.0Fixed in:10.9.0Node.js Foundation
Affected:8.9.0 8.11.4Fixed in:8.11.4Node.js Foundation

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Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged

Impact

ConfidentialityNone
IntegrityNone
AvailabilityHigh

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

Exploit Intelligence

49.27%probability of exploitation in 30 days
99thpercentile

Very high risk: more likely to be exploited than 99% of all known CVEs.

References

Vendor Advisory2

Related Vulnerabilities

Other CWE-320 vulnerabilities, ordered by exploit likelihood. View all

CVESeverityCVSSEPSSExploitedFix
CVE-2015-0936Critical9.878%--
CVE-2015-0839High8.16.3%-Fix
CVE-2018-0124Critical9.85.2%-Fix
CVE-2016-9963Medium5.93.1%-Fix
CVE-2016-2217Medium5.32.5%-Fix
CVE-2016-8614Medium6.32.5%-Fix
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.