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Vigil@nce: FFmpeg, several buffer overflows

January 2009 by Vigil@nce

SYNTHESIS OF THE VULNERABILITY

An attacker can generate several overflows in FFmpeg in order to
create a denial of service or to execute code on victim’s computer.

Gravity: 2/4

Consequences: user access/rights

Provenance: document

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)

Number of vulnerabilities in this bulletin: 2

Creation date: 16/01/2009

IMPACTED PRODUCTS
 Mandriva Linux
 Unix - plateform

DESCRIPTION OF THE VULNERABILITY

The libavcodec library of FFmpeg implements video/audio
encoders/decoders. The libavformat library implements a parser.
They contain several vulnerabilities.

An attacker can generate two overflows in the pts_buffer array of
libavformat. [grav:2/4; CVE-2008-4866]

The DCA_MAX_FRAME_SIZE variable of libavcodec is short of one
byte. [grav:2/4; CVE-2008-4867]

An attacker can therefore create a malicious file to execute code
or cause a denial of service on computer of victims accepting to
open it with a program linked to libavcodec/libavformat.

CHARACTERISTICS

Identifiers: BID-33308, CVE-2008-4866, CVE-2008-4867,
MDVSA-2009:013, MDVSA-2009:014, MDVSA-2009:015, VIGILANCE-VUL-8398

http://vigilance.fr/vulnerability/FFmpeg-several-buffer-overflows-8398


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