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CVE-2019-15718 Affecting systemd package, versions <237-3ubuntu10.28

0.0
medium

Snyk CVSS

    Attack Complexity Low

    Threat Intelligence

    EPSS 0.07% (29th percentile)
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NVD
4.4 medium
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Red Hat
5.3 medium

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  • Snyk ID SNYK-UBUNTU1804-SYSTEMD-460754
  • published 3 Sep 2019
  • disclosed 4 Sep 2019
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Introduced: 3 Sep 2019

CVE-2019-15718 Open this link in a new tab

How to fix?

Upgrade Ubuntu:18.04 systemd to version 237-3ubuntu10.28 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream systemd package and not the systemd package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 relevant fixed versions and status.

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.

References