CVE-2019-15718
Publication date 3 September 2019
Last updated 24 July 2024
Ubuntu priority
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.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| systemd | ||
| 18.04 LTS bionic |
Fixed 237-3ubuntu10.28
|
|
| 16.04 LTS xenial |
Not affected
|
|
| 14.04 LTS trusty |
Not affected
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score |
4.4 · Medium
|
| Attack vector | Local |
| Attack complexity | Low |
| Privileges required | Low |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | Low |
| Integrity impact | Low |
| Availability impact | None |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N |
References
Related Ubuntu Security Notices (USN)
- USN-4120-1
- systemd vulnerability
- 3 September 2019