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CVE-2018-7858

5.5 · MEDIUM

Quick Emulator (aka QEMU), when built with the Cirrus CLGD 54xx VGA Emulator support, allows local guest OS privileged users to cause a denial of service (out-of-bounds access and QEMU process cras…

Published Mar 12, 2018CWE-125EPSS 0.61%

Overview

CVE-2018-7858 is a medium-severity vulnerability. It was published on March 12, 2018 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

Quick Emulator (aka QEMU), when built with the Cirrus CLGD 54xx VGA Emulator support, allows local guest OS privileged users to cause a denial of service (out-of-bounds access and QEMU process crash) by leveraging incorrect region calculation when updating VGA display.

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/2019-03/msg00042.htmlRefwww.openwall.com/lists/oss-security/2018/03/09/1Refwww.securityfocus.com/bid/103350Refaccess.redhat.com/errata/RHSA-2018:1369Refaccess.redhat.com/errata/RHSA-2018:1416Refaccess.redhat.com/errata/RHSA-2018:2162Refbugzilla.redhat.com/show_bug.cgi?id=1553402Reflists.nongnu.org/archive/html/qemu-devel/2018-03/msg02174.htmlRefusn.ubuntu.com/3649-1/Reflists.opensuse.org/opensuse-security-announce/2019-03/msg00042.html

How CyberStrike helps

Frequently asked questions

What is CVE-2018-7858?

CVE-2018-7858 is a medium-severity vulnerability. It was published on March 12, 2018 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2018-7858?

This vulnerability has a CVSS 3.1 base score of 5.5, 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-2018-7858?

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-2018-7858?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2018-7858 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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