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Vigil@nce: Linux kernel: information disclosure via snd_seq_oss_synth_make_info

August 2008 by Vigil@nce

SYNTHESIS

A local attacker can use the "snd_seq_oss_synth_make_info" function to disclose information contained in the computer.

Gravity: 1/4

Consequences: data reading

Provenance: user shell

Means of attack: no proof of concept, no attack

Ability of attacker: expert (4/4)

Confidence: confirmed by the editor (5/5)

Diffusion of the vulnerable configuration: high (3/3)

Creation date: 07/08/2008

Identifier: VIGILANCE-VUL-8003

IMPACTED PRODUCTS

- Linux kernel [confidential versions]

DESCRIPTION

OSS (Open Sound System) is a sound card driver for Linux kernel.

OSS uses the "snd_seq_oss_synth_make_info" function defined in the "sound/core/seq/oss/seq_oss_synth.c" file in order to initialise the driver.

This function does not check if the device number is valid (between 0 and max number of MIDI/synth devices).

An attacker can therfore use this function to read information on victim’s computer.

CHARACTERISTICS

Identifiers: BID-30559, CVE-2008-3272, VIGILANCE-VUL-8003

https://vigilance.aql.fr/tree/1/8003




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