A weakness has been reported in D-Bus, which can be exploited by malicious, local users to cause a DoS (Denial of Service).
The weakness is caused due to an error within the "_dbus_validate_signature_with_reason()" function when validating a malformed signature. This can be exploited to terminate applications using D-Bus by tricking them into validating a specially crafted signature.
The weakness is reported in versions prior to 1.2.4.
Solution: Restrict access to trusted users only.
Provided and/or discovered by: Reported in a D-Bus bug by schelte at wanadoo dot nl.
Original Advisory: D-Bus:
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Subject: D-Bus "_dbus_validate_signature_with_reason()" Denial of Service
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