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Vulnerability Note VU#102465

PGP Desktop service fails to validate user supplied data

Overview

PGP Desktop fails to properly validate objects passed into the PGP Desktop service. This vulnerability may allow a remote, authenticated attacker to execute arbitrary code.

I. Description

PGP Desktop versions prior to 9.5.1 fail to properly validate objects passed into the PGP Desktop service (PGPServ.exe/PGPsdkServ.exe). This service is installed by PGP Desktop to transport objects and data between the PGP clients and the PGP Desktop service. The PGP Desktop service fails to properly validate user-supplied data. This may allow a remote, authenticated attacker to overwrite arbitrary memory.

II. Impact

A remote, authenticated attacker may be able to execute arbitrary code, possibly with elevated privileges.

III. Solution

Upgrade

PGP has addressed this issue in PGP version 9.5.1 and above.

Workarounds

PGP has provided the following workarounds:

    1. Turn off Windows Filesharing. This is the definitive way to eliminate the problem since disabling Windows Filesharing would prevent the attack.
    2. Use a third-party Personal Firewall, or the built-in Windows XP SP2 Firewall. Block foreign connections to your RPC/Filesharing services.

Systems Affected
VendorStatusDate Updated
PGP CorporationVulnerable31-Jan-2007

References


https://pgp.custhelp.com/cgi-bin/pgp.cfg/php/enduser/std_adp.php?p_faqid=703
http://secunia.com/advisories/23938/
http://www.ngssoftware.com/advisories/medium-risk-vulnerability-in-pgp-desktop/
http://www.itnews.com.au/newsstory.aspx?CIaNID=44982&src=site-marq
http://www.vnunet.com/vnunet/news/2173564/flaw-found-pgp-encryption

Credit

This vulnerability was reported by Peter Winter-Smith of NGSSoftware.

This document was written by Katie Steiner.

Other Information

Date Public01/25/2007
Date First Published01/31/2007 09:40:57 AM
Date Last Updated02/12/2007
CERT Advisory 
CVE NameCVE-2007-0603
US-CERT Technical Alerts 
Metric4.04
Document Revision23

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