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Vigil@nce - Python: integer overflows of audioop

June 2010 by Vigil@nce

This bulletin was written by Vigil@nce : http://vigilance.fr/

SYNTHESIS OF THE VULNERABILITY

An attacker can generate several integer overflows in the audioop
module of Python, in order to generate a denial of service or to
execute code.

Severity: 2/4

Creation date: 26/05/2010

DESCRIPTION OF THE VULNERABILITY
The audioop module of Python is used to manage audio records.

A malicious audio document generate several integer overflows in
functions of the Modules/audioop.c file:

audioop_adpcm2lin()

audioop_alaw2lin()

audioop_lin2lin()

audioop_ratecv()

audioop_tostereo()

audioop_ulaw2lin()

An attacker can therefore invite the victim to open a malicious
audio file, in order to generate a denial of service or to execute
code, in applications using Python audioop.

ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN

http://vigilance.fr/vulnerability/Python-integer-overflows-of-audioop-9668


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