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TITLE:
D-Bus "_dbus_validate_signature_with_reason()" Denial of Service

SECUNIA ADVISORY ID:
SA32127

VERIFY ADVISORY:
http://secunia.com/advisories/32127/

CRITICAL:
Not critical

IMPACT:
DoS

WHERE:
Local system

SOFTWARE:
D-Bus 1.x
http://secunia.com/advisories/product/12896/

DESCRIPTION:
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:
Update to version 1.2.4.
http://www.freedesktop.org/wiki/Software/dbus#head-dad0dab297a44f1d7a3b1259cfc06b583fd6a88a

PROVIDED AND/OR DISCOVERED BY:
Reported in a D-Bus bug by schelte at wanadoo dot nl.

ORIGINAL ADVISORY:
D-Bus:
http://www.freedesktop.org/wiki/Software/dbus#head-dad0dab297a44f1d7a3b1259cfc06b583fd6a88a

freedesktop.org bug #17803:
https://bugs.freedesktop.org/show_bug.cgi?id=17803

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