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Ubuntu: USN-4120-1 (CVE-2019-15718): systemd vulnerability

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Ubuntu: USN-4120-1 (CVE-2019-15718): systemd vulnerability

Severity
2
CVSS
(AV:L/AC:L/Au:N/C:N/I:P/A:N)
Published
09/03/2019
Created
09/05/2019
Added
09/04/2019
Modified
03/02/2020

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.

Solution(s)

  • ubuntu-upgrade-systemd

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