Vulnerability in Systemd Project
CVE-2019-15718
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 · last modified .
CVSS v3 metric
CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.005 (41.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 41st percentile — 41.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Systemd Project — versions 240
- Fedoraproject Fedora — versions 29, 30, 31
- Red Hat Enterprise Linux — versions 8.0
- Red Hat Enterprise Linux Eus — versions 8.1, 8.2, 8.4
- Red Hat Enterprise Linux For IBM Z Systems 8 S390x
- Red Hat Enterprise Linux For IBM Z Systems Eus — versions 8.1, 8.2, 8.4
- Red Hat Enterprise Linux For IBM Z Systems Eus S390x — versions 8.1, 8.2
- Red Hat Enterprise Linux For Power Little Endian — versions 8.0
- Red Hat Enterprise Linux For Power Little Endian Eus — versions 8.1, 8.2, 8.4
- Red Hat Enterprise Linux Server Aus — versions 8.2, 8.4
References
- bugzilla.redhat.com/show_bug.cgi (Patch, Third Party Advisory, Issue Tracking)
- www.openwall.com/lists/oss-security/2019/09/03/1 (Exploit, Mailing List, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- access.redhat.com/errata/RHSA-2019:3592 (vendor-advisory, Third Party Advisory, Issue Tracking)
- access.redhat.com/errata/RHSA-2019:3941 (vendor-advisory, Patch, Third Party Advisory, Issue Tracking)
Frequently asked questions
- What is CVE-2019-15718?
- CVE-2019-15718 is a medium-severity vulnerability in Systemd Project. CVSS score: 4.4/10. Published 2019-09-04.
- How severe is CVE-2019-15718?
- Medium severity. CVSS v3 base score is 4.4 out of 10.