Medium
Security advisory
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).
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2018-0737
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 04:48 UTC · Revision 1
Source evidence
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).
osv:CVE-2018-0737
Complete source record
{
"id": "e09abff18e5b9afd145c1b7c0d07b8d05a7d84508d2adc9dfb74d0b3cb51e654",
"url": "https://osv.dev/vulnerability/CVE-2018-0737",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2018-0737",
"summary": "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).",
"evidence": "osv:CVE-2018-0737",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2018-0737",
"aliases": [
"CVE-2018-0737"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/openssl/openssl",
"type": "GIT",
"events": [
{
"introduced": "e818b74be2170fbe957a07b0da4401c2b694b3b8"
},
{
"last_affected": "e818b74be2170fbe957a07b0da4401c2b694b3b8"
},
{
"introduced": "7ea5bd2b52d0e81eaef3d109b3b12545306f201c"
},
{
"last_affected": "7ea5bd2b52d0e81eaef3d109b3b12545306f201c"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "1.0.2b"
},
{
"last_affected": "1.0.2o"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "1.1.0"
},
{
"last_affected": "1.1.0h"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"versions": [
"OpenSSL_1_0_2u",
"OpenSSL_1_1_0l"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-0737.json"
}
}
],
"modified": "2026-10-24T10:30:22.320610064Z",
"provider": "osv",
"references": [
"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/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://usn.ubuntu.com/3692-1/",
"https://usn.ubuntu.com/3692-2/",
"https://www.oracle.com//security-alerts/cpujul2021.html",
"https://www.oracle.com/security-alerts/cpuapr2020.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",
"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://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/",
"https://usn.ubuntu.com/3628-2/",
"https://www.debian.org/security/2018/dsa-4348",
"https://www.debian.org/security/2018/dsa-4355",
"https://www.openssl.org/news/secadv/20180416.txt",
"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://nodejs.org/en/blog/vulnerability/august-2018-security-releases/"
],
"provider_metadata": {
"unresolved_ranges": [
{
"cpes": [
"cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*",
"cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*",
"cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:*"
],
"vendor_product": "canonical:ubuntu_linux",
"extracted_events": [
{
"range": [
{
"introduced": "14.04"
},
{
"last_affected": "14.04"
},
{
"introduced": "16.04"
},
{
"last_affected": "16.04"
},
{
"introduced": "17.10"
},
{
"last_affected": "17.10"
}
],
"source": "CPE_STRING"
}
]
}
]
}
},
"related_cves": [
{
"value": "CVE-2018-0737",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 430655,
"published_at": "2018-04-16T18:29:00.267+00:00"
}