medium
5.3
CWE
285
Advisory Published
CVE Published
CVE Published
Updated

CVE-2019-15718

First published: Tue Aug 27 2019(Updated: )

An improper authorization flaw was discovered in systemd-resolved in the way it configures the exposed DBus interface org.freedesktop.resolve1. An unprivileged local attacker could call all DBus methods, even when marked as privileged operations. An attacker could abuse this flaw by changing the DNS, Search Domain, LLMNR, DNSSEC and other network link settings without any authorization, allowing control of the network names resolution process and cause the system to communicate with wrong or malicious servers.

Credit: cve@mitre.org

Affected SoftwareAffected VersionHow to fix
redhat/systemd<0:239-18.el8
0:239-18.el8
Systemd Project Systemd=240
Fedoraproject Fedora=29
Fedoraproject Fedora=30
Fedoraproject Fedora=31
Redhat Openshift Container Platform=4.1
Redhat Enterprise Linux=8.0
Redhat Enterprise Linux Eus=8.1
Redhat Enterprise Linux Eus=8.2
Redhat Enterprise Linux Eus=8.4
Redhat Enterprise Linux For Ibm Z Systems 8 S390x
Redhat Enterprise Linux For Ibm Z Systems Eus=8.1
Redhat Enterprise Linux For Ibm Z Systems Eus=8.2
Redhat Enterprise Linux For Ibm Z Systems Eus=8.4
Redhat Enterprise Linux For Ibm Z Systems Eus S390x=8.1
Redhat Enterprise Linux For Ibm Z Systems Eus S390x=8.2
Redhat Enterprise Linux For Power Little Endian=8.0
Redhat Enterprise Linux For Power Little Endian Eus=8.1
Redhat Enterprise Linux For Power Little Endian Eus=8.2
Redhat Enterprise Linux For Power Little Endian Eus=8.4
Redhat Enterprise Linux Server Aus=8.2
Redhat Enterprise Linux Server Aus=8.4
Redhat Enterprise Linux Server For Power Little Endian Update Services For Sap Solutions=8.1
Redhat Enterprise Linux Server For Power Little Endian Update Services For Sap Solutions=8.2
Redhat Enterprise Linux Server For Power Little Endian Update Services For Sap Solutions=8.4
Redhat Enterprise Linux Server Tus=8.2
Redhat Enterprise Linux Server Tus=8.4
Redhat Enterprise Linux Server Update Services For Sap Solutions=8.1
Redhat Enterprise Linux Server Update Services For Sap Solutions=8.2
Redhat Enterprise Linux Server Update Services For Sap Solutions=8.4

Remedy

https://access.redhat.com/errata/RHSA-2019:3941

Remedy

https://bugzilla.redhat.com/show_bug.cgi?id=1746057

Remedy

Disable systemd-resolved service by using `sudo systemctl disable systemd-resolved`.

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is the vulnerability ID?

    The vulnerability ID is CVE-2019-15718.

  • What is the severity of CVE-2019-15718?

    The severity of CVE-2019-15718 is medium with a CVSS score of 5.3.

  • What is the affected software of CVE-2019-15718?

    The affected software includes systemd versions 240, 243, and earlier, as well as Red Hat Enterprise Linux 8.0, 8.1, 8.2, 8.4, and other related distributions.

  • How can an attacker exploit CVE-2019-15718?

    An attacker can exploit CVE-2019-15718 by calling all DBus methods, even privileged operations, through the exposed DBus interface org.freedesktop.resolve1.

  • Where can I find more information about CVE-2019-15718?

    More information about CVE-2019-15718 can be found at the following references: [GitHub Pull Request](https://github.com/systemd/systemd/pull/13457), [Bugzilla](https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1748767).

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