Timing attack against ECDSA signature generation

MITRE NVD CVE.ORG JSON API Print: PDF PDF

Summary

CVECVE-2018-0735
StatePUBLISHED
Assigneropenssl
Source PriorityCVE Program / NVD first with legacy fallback
Published2018-10-29 13:29:00 UTC
Updated2026-10-08 22:16:43 UTC
DescriptionThe OpenSSL ECDSA signature algorithm has been shown to be vulnerable to a timing side channel attack. An attacker could use variations in the signing algorithm to recover the private key. Fixed in OpenSSL 1.1.0j (Affected 1.1.0-1.1.0i). Fixed in OpenSSL 1.1.1a (Affected 1.1.1).

Risk And Classification

Primary CVSS: v3.1 5.9 MEDIUM from [email protected]

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

Problem Types: CWE-327 | Constant time issue

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary5.9MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
2.0[email protected]Primary4.3AV:N/AC:M/Au:N/C:P/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

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

CVSS v2.0 Breakdown

Access Vector
Network
Access Complexity
Medium
Authentication
None
Confidentiality
Partial
Integrity
None
Availability
None

AV:N/AC:M/Au:N/C:P/I:N/A:N

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Canonical Ubuntu Linux 14.04 All All All
Operating System Canonical Ubuntu Linux 16.04 All All All
Operating System Canonical Ubuntu Linux 18.04 All All All
Operating System Canonical Ubuntu Linux 18.10 All All All
Operating System Debian Debian Linux 8.0 All All All
Operating System Debian Debian Linux 9.0 All All All
Application Nodejs Node.js All All All All
Application Openssl Openssl 1.1.1 All All All
Application Openssl Openssl All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA OpenSSL OpenSSL affected Fixed in OpenSSL 1.1.0j (Affected 1.1.0-1.1.0i) Not specified
CNA OpenSSL OpenSSL affected Fixed in OpenSSL 1.1.1a (Affected 1.1.1) Not specified

References

ReferenceSourceLinkTags
www.openssl.org/news/secadv/20181029.txt af854a3a-2127-422b-91ae-364da2661108 www.openssl.org Vendor Advisory
git.openssl.org Git - openssl.git/commitdiff af854a3a-2127-422b-91ae-364da2661108 git.openssl.org
Oracle Critical Patch Update - July 2019 af854a3a-2127-422b-91ae-364da2661108 www.oracle.com Patch, Third Party Advisory
[SECURITY] [DLA 1586-1] openssl security update af854a3a-2127-422b-91ae-364da2661108 lists.debian.org Mailing List, Third Party Advisory
Oracle Critical Patch Update - January 2019 af854a3a-2127-422b-91ae-364da2661108 www.oracle.com Patch, Third Party Advisory
OpenSSL ECDSA Signature Algorithm Lets Remote Users Obtain Passwords on the Target System in Certain Cases - SecurityTracker af854a3a-2127-422b-91ae-364da2661108 www.securitytracker.com Third Party Advisory, VDB Entry
OpenSSL CVE-2018-0735 Side Channel Attack Information Disclosure Vulnerability af854a3a-2127-422b-91ae-364da2661108 www.securityfocus.com Third Party Advisory, VDB Entry
Debian -- Security Information -- DSA-4348-1 openssl af854a3a-2127-422b-91ae-364da2661108 www.debian.org Third Party Advisory
USN-3840-1: OpenSSL vulnerabilities | Ubuntu security notices af854a3a-2127-422b-91ae-364da2661108 usn.ubuntu.com Third Party Advisory
git.openssl.org Git - openssl.git/commitdiff af854a3a-2127-422b-91ae-364da2661108 git.openssl.org
October 2018 OpenSSL Vulnerabilities in NetApp Products | NetApp Product Security af854a3a-2127-422b-91ae-364da2661108 security.netapp.com Third Party Advisory
November 2018 Security Releases | Node.js af854a3a-2127-422b-91ae-364da2661108 nodejs.org Third Party Advisory
Oracle Critical Patch Update Advisory - April 2019 af854a3a-2127-422b-91ae-364da2661108 www.oracle.com Patch, Third Party Advisory
Oracle Critical Patch Update Advisory - January 2020 af854a3a-2127-422b-91ae-364da2661108 www.oracle.com Third Party Advisory
Red Hat Customer Portal af854a3a-2127-422b-91ae-364da2661108 access.redhat.com Third Party Advisory
git.openssl.org Git - openssl.git/commitdiff MITRE git.openssl.org
git.openssl.org Git - openssl.git/commitdiff MITRE git.openssl.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Samuel Weiser (en)

Legacy QID Mappings

  • 296075 Oracle Solaris 11.4 Support Repository Update (SRU) 21.69.0 Missing (CPUAPR2020)
  • 500432 Alpine Linux Security Update for nodejs
  • 500491 Alpine Linux Security Update for Open Secure Sockets Layer (OpenSSL)
  • 500559 Alpine Linux Security Update for Open Secure Sockets Layer (OpenSSL)
  • 500758 Alpine Linux Security Update for openssl
  • 501095 Alpine Linux Security Update for nodejs-current
  • 501158 Alpine Linux Security Update for openssl
  • 501977 Alpine Linux Security Update for Open Secure Sockets Layer3 (OpenSSL3)
  • 502896 Alpine Linux Security Update for openssl1.1-compat
  • 504195 Alpine Linux Security Update for nodejs
  • 504250 Alpine Linux Security Update for openssl
  • 690638 Free Berkeley Software Distribution (FreeBSD) Security Update for Open Secure Sockets Layer (OpenSSL) (238ae7de-dba2-11e8-b713-b499baebfeaf)

© CVE.report 2026

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

Free CVE JSON API cve.report/api

CVE.report and Source URL Uptime Status status.cve.report