Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2018-0735

23
FAUCET Score

CVE-2018-0735 describes a timing side-channel vulnerability in the OpenSSL ECDSA signature algorithm, affecting versions 1.1.0 through 1.1.0i and 1.1.1. This medium-severity vulnerability (CVSS 5.9) allows a remote attacker with high attack complexity to potentially recover private keys by observing variations in signature generation times. While the potential impact is high for confidentiality, there is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 1.1.0, <= 1.1.0iCPE matchmatch criteria
cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*
1.1.1CPE matchmatch criteria
cpe:2.3:a:openssl:openssl:1.1.1:*:*:*:*:*:*:*
14.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
16.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
18.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.9MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
2.2
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
4.76%
Probability of exploitation in next 30 days
EPSS Percentile
91.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0476 is in the 89th percentile among its peer group of 19,955 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (5)

oraclepatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: openssl-1:1.0.2k-16.el7_6.1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: openssl-1:1.1.1c-2.el8
View patch
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: openssl
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: OVMF

Vendor Advisories (2)

redhatCVE-2018-0735Low

openssl: timing side channel attack in the ECDSA signature generation

Oct 25, 2018
microsoft2018-Oct/CVE-2018-0735Moderate

Timing attack against ECDSA signature generation

Oct 9, 2018

References

access.redhat.com / errata/RHSA-2019:3700
Third Party Advisory
git.openssl.org / gitweb
git.openssl.org / gitweb
lists.debian.org / debian-lts-announce/2018/11/msg00024.html
Mailing ListThird Party Advisory
nodejs.org / en/blog/vulnerability/november-2018-security-releases
Third Party Advisory
security.netapp.com / advisory/ntap-20181105-0002
Third Party Advisory
usn.ubuntu.com / 3840-1
Third Party Advisory
debian.org / security/2018/dsa-4348
Third Party Advisory
openssl.org / news/secadv/20181029.txt
Vendor Advisory
oracle.com / security-alerts/cpujan2020.html
Third Party Advisory
oracle.com / technetwork/security-advisory/cpuapr2019-5072813.html
PatchThird Party Advisory
oracle.com / technetwork/security-advisory/cpujan2019-5072801.html
PatchThird Party Advisory
oracle.com / technetwork/security-advisory/cpujul2019-5072835.html
PatchThird Party Advisory
securityfocus.com / bid/105750
Third Party AdvisoryVDB Entry
securitytracker.com / id/1041986
Third Party AdvisoryVDB Entry