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Vulnerability record · CVE-2019-15718 · published 4 September 2019

CVE-2019-15718: Systemd project systemd vulnerability

Systemd Project · Systemd

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.

4.4 CVSS 3.1 Medium EPSS 0.51% · top 58.3%
4.4CVSS 3.1 base score, v2 3.6
0.51%EPSS exploitation probability, 30 days
NoNot in CISA KEV
14Affected product versions listed by NVD
14References, 2 tagged exploit
17 Jun 2026Last modified by NVD

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.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Affected products

14 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.openwall.com/lists/oss-security/2019/09/03/1 ExploitMailing ListThird Party Advisory
https://access.redhat.com/errata/RHSA-2019:3592 Issue TrackingThird Party Advisory
https://access.redhat.com/errata/RHSA-2019:3941 Issue TrackingPatchThird Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1746057 Issue TrackingPatchThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BRE5IS24XTF5WNZGH2L7GSQ
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HIKGKXZ5OEGOEYURHLJHEMF
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U2WNHRJW4XI6H5YMDG4BUFG
http://www.openwall.com/lists/oss-security/2019/09/03/1 ExploitMailing ListThird Party Advisory
https://access.redhat.com/errata/RHSA-2019:3592 Issue TrackingThird Party Advisory
https://access.redhat.com/errata/RHSA-2019:3941 Issue TrackingPatchThird Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1746057 Issue TrackingPatchThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BRE5IS24XTF5WNZGH2L7GSQ
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HIKGKXZ5OEGOEYURHLJHEMF
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U2WNHRJW4XI6H5YMDG4BUFG

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Source: NIST National Vulnerability Database (record CVE-2019-15718), CISA KEV, FIRST EPSS (scores of 2026-10-08). This page is refreshed as NVD updates the record.