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CVE-2018-19967

6.5 · MEDIUM

An issue was discovered in Xen through 4.11.x on Intel x86 platforms allowing guest OS users to cause a denial of service (host OS hang) because Xen does not work around Intel's mishandling of cert…

Published Dec 8, 2018CWE-20EPSS 0.45%

Overview

CVE-2018-19967 is a medium-severity vulnerability. It was published on December 8, 2018 and has a CVSS 3.0 base score of 6.5 (MEDIUM).

This vulnerability has a CVSS 3.0 base score of 6.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

An issue was discovered in Xen through 4.11.x on Intel x86 platforms allowing guest OS users to cause a denial of service (host OS hang) because Xen does not work around Intel's mishandling of certain HLE transactions associated with the KACQUIRE instruction prefix.

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

Reflists.opensuse.org/opensuse-security-announce/2019-04/msg00057.htmlReflists.opensuse.org/opensuse-security-announce/2019-04/msg00072.htmlRefwww.securityfocus.com/bid/106182Refsupport.citrix.com/article/CTX239432Refwww.debian.org/security/2019/dsa-4369Refxenbits.xen.org/xsa/advisory-282.htmlReflists.opensuse.org/opensuse-security-announce/2019-04/msg00057.htmlReflists.opensuse.org/opensuse-security-announce/2019-04/msg00072.htmlRefwww.securityfocus.com/bid/106182Refsupport.citrix.com/article/CTX239432

How CyberStrike helps

Frequently asked questions

What is CVE-2018-19967?

CVE-2018-19967 is a medium-severity vulnerability. It was published on December 8, 2018 and has a CVSS 3.0 base score of 6.5 (MEDIUM).

How severe is CVE-2018-19967?

This vulnerability has a CVSS 3.0 base score of 6.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2018-19967?

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-2018-19967?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2018-19967 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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