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Vigil@nce: file, denial of service via CDF

March 2012 by Vigil@nce

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

SYNTHESIS OF THE VULNERABILITY

An attacker can invite the victim to open a malicious CDF document
with the "file" tool, in order to stop the process.

 Severity: 1/4
 Creation date: 23/03/2012

IMPACTED PRODUCTS

 Debian Linux
 Mandriva Linux
 Unix - plateform

DESCRIPTION OF THE VULNERABILITY

The CDF (Compound Document Format) format is used to group several
files (SVG, XHTML, etc.).

The "file" tool analyzes files, in order to detect their formats.
The cdf_read_sector() and cdf_read_short_sector() function of the
src/cdf.c file analyze sectors of CDF documents, in order to
indicate their content. However, if sector information are
incorrect, the "file" program tries to read at invalid memory
addresses, so it stops.

An attacker can therefore invite the victim to open a malicious
CDF document with the "file" tool, in order to stop the process.

ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN

http://vigilance.fr/vulnerability/file-denial-of-service-via-CDF-11485


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