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Vulnerability record · CVE-2018-0737 · published 16 April 2018

CVE-2018-0737: Openssl broken cryptographic algorithm vulnerability

OOpenssl · Openssl

The OpenSSL RSA Key generation algorithm has been shown to be vulnerable to a cache timing side channel attack. An attacker with sufficient access to mount cache timing attacks during the RSA key generation process could recover the private key. Fixed in OpenSSL 1.1.0i-dev (Affected 1.1.0-1.1.0h). Fixed in OpenSSL 1.0.2p-dev (Affected 1.0.2b-1.0.2o).

5.9 CVSS 3.0 Medium EPSS 12% · top 4.1% CWE-327 · Broken cryptographic algorithm
5.9CVSS 3.0 base score, v2 4.3
12%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
68References
17 Jun 2026Last modified by NVD

Description

The OpenSSL RSA Key generation algorithm has been shown to be vulnerable to a cache timing side channel attack. An attacker with sufficient access to mount cache timing attacks during the RSA key generation process could recover the private key. Fixed in OpenSSL 1.1.0i-dev (Affected 1.1.0-1.1.0h). Fixed in OpenSSL 1.0.2p-dev (Affected 1.0.2b-1.0.2o).

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html
http://www.securityfocus.com/bid/103766 Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1040685 Third Party AdvisoryVDB Entry
https://access.redhat.com/errata/RHSA-2018:3221
https://access.redhat.com/errata/RHSA-2018:3505
https://access.redhat.com/errata/RHSA-2019:3932
https://access.redhat.com/errata/RHSA-2019:3933
https://access.redhat.com/errata/RHSA-2019:3935
https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=349a41da1ad88ad87825414752a8ff5fdd6a6c3f
https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=6939eab03a6e23d2bd2c3f5e34fe1d48e542e787
https://lists.debian.org/debian-lts-announce/2018/07/msg00043.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EWC42UXL5GHTU5G77VKBF6J
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Y3IVFGSERAZLNJCK35TEM2R
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZBEV5QGDRFUZDMNECFXUSN5
https://nodejs.org/en/blog/vulnerability/august-2018-security-releases/
https://security.gentoo.org/glsa/201811-21
https://security.netapp.com/advisory/ntap-20180726-0003/
https://securityadvisories.paloaltonetworks.com/Home/Detail/133
https://usn.ubuntu.com/3628-1/ Third Party Advisory
https://usn.ubuntu.com/3628-2/ Third Party Advisory
https://usn.ubuntu.com/3692-1/
https://usn.ubuntu.com/3692-2/
https://www.debian.org/security/2018/dsa-4348
https://www.debian.org/security/2018/dsa-4355
https://www.openssl.org/news/secadv/20180416.txt Vendor Advisory
https://www.oracle.com//security-alerts/cpujul2021.html
https://www.oracle.com/security-alerts/cpuapr2020.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.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/103766 Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1040685 Third Party AdvisoryVDB Entry
https://access.redhat.com/errata/RHSA-2018:3221
https://access.redhat.com/errata/RHSA-2018:3505
https://access.redhat.com/errata/RHSA-2019:3932

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Source: NIST National Vulnerability Database (record CVE-2018-0737), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.