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CVE-2019-15718 Affecting systemd package, versions <242-7

Severity

 Recommended
0.0
medium
0
10

Snyk's Security Team recommends NVD's CVSS assessment

    Threat Intelligence

    EPSS
    0.1% (42nd percentile)

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  • Snyk ID SNYK-DEBIAN11-SYSTEMD-529858
  • 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 Debian:11 systemd to version 242-7 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 Debian. See How to fix? for Debian:11 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

CVSS Scores

version 3.1
Expand this section

NVD

Recommended
4.4 medium
  • Attack Vector (AV)
    Local
  • Attack Complexity (AC)
    Low
  • Privileges Required (PR)
    Low
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    Low
  • Integrity (I)
    Low
  • Availability (A)
    None