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CVE-2018-5731

7.0 · HIGH

An issue was discovered in Heimdal PRO 2.2.190.

Published Mar 22, 2018CWE-20EPSS 0.41%

Overview

CVE-2018-5731 is a high-severity vulnerability. It was published on March 22, 2018 and has a CVSS 3.0 base score of 7.0 (HIGH).

This vulnerability has a CVSS 3.0 base score of 7.0, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

An issue was discovered in Heimdal PRO 2.2.190. As part of the scanning feature, a process called md.hs writes an executable called CS1.tmp to C:\windows\TEMP. Afterwards the executable is run. It is possible for an attacker to create the file first, let md.hs overwrite it, and then rewrite the file in the window between md.hs closing the file and executing it. This can be exploited via opportunistic locks and a high priority thread. The vulnerability is triggered when a scan starts. NOTE: any affected Heimdal products are completely unrelated to the Heimdal vendor of a Kerberos 5 product on the h5l.org web site.

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

Refimprosec.com/blog/heimdal-advisory-2Refimprosec.com/blog/heimdal-advisory-2

How CyberStrike helps

Frequently asked questions

What is CVE-2018-5731?

CVE-2018-5731 is a high-severity vulnerability. It was published on March 22, 2018 and has a CVSS 3.0 base score of 7.0 (HIGH).

How severe is CVE-2018-5731?

This vulnerability has a CVSS 3.0 base score of 7.0, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2018-5731?

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-2018-5731?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2018-5731 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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