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Vulnerability of Bluetooth: denial of service via OBEX PUSH

Synthesis of the vulnerability 

An attacker can send numerous OBEX PUSH queries in order to block Bluetooth devices.
Impacted software: Bluetooth protocol.
Severity of this computer vulnerability: 1/4.
Creation date: 23/01/2007.
Références of this announce: VIGILANCE-VUL-6484.

Description of the vulnerability 

The OBEX service (Object Exchange; over RFCOMM, over L2CAP) of Bluetooth permits to exchange objects/files. The PUSH command uploads files to the device, whereas the PULL command downloads them.

When an user receives an OBEX PUSH query, a dialog is displayed on some devices. Until user accepts or rejects this transfer, he cannot access to his application.

An attacker can therefore continuously send OBEX queries in order to generate a denial of service.
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This weakness impacts software or systems such as Bluetooth protocol.

Our Vigil@nce team determined that the severity of this vulnerability announce is low.

The trust level is of type unique source, with an origin of radio connection.

A proof of concept or an attack tool is available, so your teams have to process this alert. An attacker with a technician ability can exploit this threat bulletin.

Solutions for this threat 

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