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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/f...




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