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.

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.

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Impact

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

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Solution

Upgrade

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

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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.

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Vendor Information

102465

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PGP Corporation __ Affected

Updated: January 31, 2007

Status

Affected

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

Please see PGP FAQ 703 for further information.

If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23102465 Feedback>).

CVSS Metrics

Group	Score	Vector
Base
Temporal
Environmental

References

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

Acknowledgements

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

This document was written by Katie Steiner.

Other Information

CVE IDs:	CVE-2007-0603
Severity Metric:	4.04 Date Public: