ALT-PU-2019-1260-2

Package update systemd in branch sisyphus

Version241-alt1

Published2026-03-07

Max severityCRITICAL

Severity:

Closed issues (3)

MEDIUM5.5

Уязвимость функции bus_open_system_watch_bind_with_description (shared/bus-util.c) демона Systemd, позволяющая нарушителю повысить свои привилегии и изменить DNS настройки

Published: 2019-09-19Modified: 2021-03-23

CVSS 3.xMEDIUM 5.5

CVSS:3.x/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

CVSS 2.0MEDIUM 4.9

CVSS:2.0/AV:L/AC:L/Au:N/C:N/I:C/A:N

References

CVE-2019-15718

MEDIUM4.4

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.

Published: 2019-09-04Modified: 2024-11-21

CVSS 2.0LOW 3.6

CVSS:2.0/AV:L/AC:L/Au:N/C:P/I:P/A:N

CVSS 3.xMEDIUM 4.4

CVSS:3.x/CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

References

CRITICAL9.8

A use-after-free vulnerability was found in systemd. This issue occurs due to the on_stream_io() function and dns_stream_complete() function in 'resolved-dns-stream.c' not incrementing the reference counting for the DnsStream object. Therefore, other functions and callbacks called can dereference the DNSStream object, causing the use-after-free when the reference is still used later.

Published: 2022-09-09Modified: 2024-11-21

CVSS 3.xCRITICAL 9.8

CVSS:3.x/CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References