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CVE-2019-15718

4.4 · MEDIUM

In systemd 240, bus_open_system_watch_bind_with_description in shared/bus-util.c (as used by systemd-resolved to connect to the system D-Bus instance), calls sd_bus_set_trusted, which disables acce…

Published Sep 4, 2019EPSS 0.51%

Overview

CVE-2019-15718 is a medium-severity vulnerability. It was published on September 4, 2019 and has a CVSS 3.1 base score of 4.4 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 4.4, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

In systemd 240, bus_open_system_watch_bind_with_description in shared/bus-util.c (as used by systemd-resolved to connect to the system D-Bus instance), calls sd_bus_set_trusted, which disables access controls for incoming D-Bus messages. An unprivileged user can exploit this by executing D-Bus methods that should be restricted to privileged users, in order to change the system's DNS resolver settings.

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.openwall.com/lists/oss-security/2019/09/03/1Refaccess.redhat.com/errata/RHSA-2019:3592Refaccess.redhat.com/errata/RHSA-2019:3941Refbugzilla.redhat.com/show_bug.cgi?id=1746057Reflists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BRE5IS24XTF5WNZGH2L7GSQJKARBOEGL/Reflists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HIKGKXZ5OEGOEYURHLJHEMFYNLEGAW5B/Reflists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U2WNHRJW4XI6H5YMDG4BUFGPAXWUMUVG/Refwww.openwall.com/lists/oss-security/2019/09/03/1Refaccess.redhat.com/errata/RHSA-2019:3592Refaccess.redhat.com/errata/RHSA-2019:3941

How CyberStrike helps

Frequently asked questions

What is CVE-2019-15718?

CVE-2019-15718 is a medium-severity vulnerability. It was published on September 4, 2019 and has a CVSS 3.1 base score of 4.4 (MEDIUM).

How severe is CVE-2019-15718?

This vulnerability has a CVSS 3.1 base score of 4.4, 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-2019-15718?

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-2019-15718?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2019-15718 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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