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CVE-2019-15718

Status Candidate

Overview

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.

Related Files

Red Hat Security Advisory 2019-3941-01
Posted Nov 21, 2019
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2019-3941-01 - Red Hat OpenShift Container Platform is Red Hat's cloud computing Kubernetes application platform solution designed for on-premise or private cloud deployments. This is a text-only advisory for the machine-os-content container image, which includes RPM packages for Red Hat Enterprise Linux CoreOS. Issues addressed include bypass and denial of service vulnerabilities.

tags | advisory, denial of service, vulnerability
systems | linux, redhat
advisories | CVE-2018-12207, CVE-2019-14287, CVE-2019-15718
SHA-256 | 4e761927f0cc5297cdd4c2315408630ee69d81fb83516060648b9a14bfb71524
Red Hat Security Advisory 2019-3592-01
Posted Nov 6, 2019
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2019-3592-01 - The systemd packages contain systemd, a system and service manager for Linux, compatible with the SysV and LSB init scripts. It provides aggressive parallelism capabilities, uses socket and D-Bus activation for starting services, offers on-demand starting of daemons, and keeps track of processes using Linux cgroups. A privilege escalation issue was addressed.

tags | advisory
systems | linux, redhat
advisories | CVE-2019-15718
SHA-256 | dfac4e056299f608c197a4b6ec753d85f8b4d657f71eaef9542b5924ba31c20b
Ubuntu Security Notice USN-4120-1
Posted Sep 3, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4120-1 - It was discovered that the systemd-resolved D-Bus interface did not enforce appropriate access controls. A local unprivileged user could exploit this to modify a system's DNS resolver settings.

tags | advisory, local
systems | linux, ubuntu
advisories | CVE-2019-15718
SHA-256 | c86f578cb209c9dd585d96bb0fc7af8226aa79a63c36f9a84d3f1e26a081c040
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