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CVE-2018-0735

5.9 · MEDIUM

The OpenSSL ECDSA signature algorithm has been shown to be vulnerable to a timing side channel attack.

Published Oct 29, 2018CWE-327EPSS 4.72%

Overview

CVE-2018-0735 is a medium-severity vulnerability. It was published on October 29, 2018 and has a CVSS 3.1 base score of 5.9 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.9, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

The 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).

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refwww.securityfocus.com/bid/105750Refwww.securitytracker.com/id/1041986Refaccess.redhat.com/errata/RHSA-2019:3700Refgit.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=56fb454d281a023b3f950d969693553d3f3ceea1Refgit.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=b1d6d55ece1c26fa2829e2b819b038d7b6d692b4Reflists.debian.org/debian-lts-announce/2018/11/msg00024.htmlRefnodejs.org/en/blog/vulnerability/november-2018-security-releases/Refsecurity.netapp.com/advisory/ntap-20181105-0002/Refusn.ubuntu.com/3840-1/Refwww.debian.org/security/2018/dsa-4348

How CyberStrike helps

Frequently asked questions

What is CVE-2018-0735?

CVE-2018-0735 is a medium-severity vulnerability. It was published on October 29, 2018 and has a CVSS 3.1 base score of 5.9 (MEDIUM).

How severe is CVE-2018-0735?

This vulnerability has a CVSS 3.1 base score of 5.9, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2018-0735?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2018-0735?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2018-0735 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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