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Vulnerability of PGP Desktop: partial removal of data

Synthesis of the vulnerability 

The Wipe Free Space utility does not erase all hard drive data.
Vulnerable products: PGP Desktop.
Severity of this weakness: 1/4.
Creation date: 19/12/2005.
Références of this bulletin: CVE-2005-4151, VIGILANCE-VUL-5436.

Description of the vulnerability 

System stores files in clusters of 4096 bytes. A file of 9024 bytes (2*4096+832) uses 3 clusters, whose last is partially filled (only 832 bytes are used). Thus, 3264 bytes (4096-832) are free.

Under Windows XP and NTFS, the Wipe Free Space utility of PGP Desktop does not erase the free bytes.

The sensitive information they may contain is therefore not erased.
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This threat bulletin impacts software or systems such as PGP Desktop.

Our Vigil@nce team determined that the severity of this computer threat bulletin is low.

The trust level is of type confirmed by the editor, with an origin of user shell.

An attacker with a expert ability can exploit this computer threat.

Solutions for this threat 

PGP Desktop: version 9.0.4.
Version 9.0.4 is corrected (available on December 21th, 2005).
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