Description
The dbus-daemon in D-Bus 1.2.x through 1.4.x, 1.6.x before 1.6.20, and 1.8.x before 1.8.4, sends an AccessDenied error to the service instead of a client when the client is prohibited from accessing the service, which allows local users to cause a denial of service (initialization failure and exit) or possibly conduct a side-channel attack via a D-Bus message to an inactive service.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | dbus | 1.8.4-1 | — |
| Debian 13 | dbus | 1.8.4-1 | — |
| Debian 12 | dbus | 1.8.4-1 | — |
| Debian 7 | dbus | 1.6.8-1+deb7u3 | DSA-2971-1 |
| Debian 6.0 | dbus | 1.2.24-4+squeeze3 | DLA-87-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | dbus | 1.6.18-0ubuntu4.1 | USN-2275-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | dbus-1 | 1.10.12-2.1 | openSUSE-SU-2024:10517-1 |
Advisories 4
- USN-2275-1 dbus vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DLA-87-1 dbus - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-2971-1 dbus - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:10517-1 dbus-1-1.10.12-2.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
References
- 59798 third-party-advisory
- 59611 third-party-advisory
- openSUSE-SU-2014:1239 vendor-advisory
- 67986 vdb-entry
- openSUSE-SU-2014:0874 vendor-advisory
- [oss-security] 20140610 CVE-2014-3477 (fd.o#78979): local DoS in dbus-daemon mailing-list
- openSUSE-SU-2014:0821 vendor-advisory
- http://advisories.mageia.org/MGASA-2014-0266.html
- 59428 third-party-advisory
- https://bugs.freedesktop.org/show_bug.cgi?id=78979
- http://cgit.freedesktop.org/dbus/dbus/commit/?h=dbus-1.8&id=24c590703ca47eb71ddef453de43126b90954567
- DSA-2971 vendor-advisory
- MDVSA-2015:176 vendor-advisory