FreeBSD : gnupg -- OpenPGP symmetric encryption vulnerability (8375a73f-01bf-11da-bc08-0001020eed82)

Medium Nessus Plugin ID 19349


The remote FreeBSD host is missing one or more security-related updates.


Serge Mister and Robert Zuccherato reports that the OpenPGP protocol is vulnerable to a cryptographic attack when using symmetric encryption in an automated way.

David Shaw reports about the impact :

This attack, while very significant from a cryptographic point of view, is not generally effective in the real world. To be specific, unless you have your OpenPGP program set up as part of an automated system to accept encrypted messages, decrypt them, and then provide a response to the submitter, then this does not affect you at all.

Note that the fix in GnuPG does note completely eliminate the potential problem :

These patches disable a portion of the OpenPGP protocol that the attack is exploiting. This change should not be user visible. With the patch in place, this attack will not work using a public-key encrypted message. It will still work using a passphrase-encrypted message.


Update the affected packages.

See Also

Plugin Details

Severity: Medium

ID: 19349

File Name: freebsd_pkg_8375a73f01bf11dabc080001020eed82.nasl

Version: $Revision: 1.13 $

Type: local

Published: 2005/08/01

Modified: 2013/06/22

Dependencies: 12634

Risk Information

Risk Factor: Medium


Base Score: 5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N

Vulnerability Information

CPE: p-cpe:/a:freebsd:freebsd:gnupg, p-cpe:/a:freebsd:freebsd:p5-Crypt-OpenPGP, p-cpe:/a:freebsd:freebsd:pgp, cpe:/o:freebsd:freebsd

Required KB Items: Host/local_checks_enabled, Host/FreeBSD/release, Host/FreeBSD/pkg_info

Patch Publication Date: 2005/07/31

Vulnerability Publication Date: 2005/02/08

Reference Information

CVE: CVE-2005-0366

CERT: 303094