[arch-security] [ASA-201502-10] dbus: denial of service

Levente Polyak anthraxx at archlinux.org
Tue Feb 10 00:09:46 UTC 2015

Arch Linux Security Advisory ASA-201502-10

Severity: Medium
Date    : 2015-02-10
CVE-ID  : CVE-2015-0245
Package : dbus
Type    : denial of service
Remote  : No
Link    : https://wiki.archlinux.org/index.php/CVE


The package dbus before version 1.8.16-1 is vulnerable to denial of service.


Upgrade to 1.8.16-1.

# pacman -Syu "dbus>=1.8.16-1"

The problem has been fixed upstream in version 1.8.16.




Systemd sends back an ActivationFailure D-Bus signal if the activation
fails. However, when it receives these signals, dbus-daemon does not
verify that the signal actually came from systemd. A malicious local
user could send repeated ActivationFailure signals in the hope that it
would "win the race" with the genuine signal, causing D-Bus to send back
an error to the client that requested activation.


A local attacker could send repeated ActivationFailure signals, causing
D-Bus to potentially send back an error to the client that requested
activation resulting in denial of service.



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