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.
CVSS Metrics
- Vector
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
- Attack Vector
- local
- Complexity
- low
- Privileges
- low
- User Action
- none
- Scope
- unchanged
- Confidentiality
- low
- Integrity
- low
- Availability
- none
- Weaknesses
- NVD-CWE-noinfo
Metadata
- Primary Vendor
- SYSTEMD_PROJECT
- Published
- 9/4/2019
- Last Modified
- 11/21/2024
- Source
- NIST NVD
- Note: Verify all details with official vendor sources before applying patches.
Affected Products
systemd_project : systemdfedoraproject : fedorafedoraproject : fedorafedoraproject : fedoraredhat : openshift_container_platformredhat : enterprise_linuxredhat : enterprise_linux_eusredhat : enterprise_linux_eusredhat : enterprise_linux_eusredhat : enterprise_linux_for_ibm_z_systems_8_s390xredhat : enterprise_linux_for_ibm_z_systems_eusredhat : enterprise_linux_for_ibm_z_systems_eusredhat : enterprise_linux_for_ibm_z_systems_eusredhat : enterprise_linux_for_ibm_z_systems_eus_s390xredhat : enterprise_linux_for_ibm_z_systems_eus_s390xredhat : enterprise_linux_for_power_little_endianredhat : enterprise_linux_for_power_little_endian_eusredhat : enterprise_linux_for_power_little_endian_eusredhat : enterprise_linux_for_power_little_endian_eusredhat : enterprise_linux_server_ausredhat : enterprise_linux_server_ausredhat : enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutionsredhat : enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutionsredhat : enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutionsredhat : enterprise_linux_server_tusredhat : enterprise_linux_server_tusredhat : enterprise_linux_server_update_services_for_sap_solutionsredhat : enterprise_linux_server_update_services_for_sap_solutionsredhat : enterprise_linux_server_update_services_for_sap_solutions
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