Security News > 2004 > February > EEYE: ZoneLabs SMTP Processing Buffer Overflow
Forwarded from: "Marc Maiffret" ZoneLabs SMTP Processing Buffer Overflow Release Date: February 18, 2004 Date Reported: February 13, 2004 Severity: Medium (Local Privilege Escalation/Remote Code Execution) Vendor: ZoneLabs Inc. Software Affected: ZoneAlarm 4.0 and above ZoneAlarm Pro 4.0 and above ZoneAlarm Plus 4.0 and above ZoneLabs Integrity client 4.0 and above Description: ZoneLabs provides a suite of desktop firewall products. Products in this suite such as ZoneAlarm analyze incoming and outgoing email messages for malicious or otherwise abnormal content. When ZoneAlarm examines outgoing email messages a buffer overflow condition is presented when they retrieve the destination email address from the message. An attacker can exploit this vulnerability to elevate his privileges to SYSTEM on any machine protected by a vulnerable ZoneLabs product. This vulnerability can also be exploited remotely if an attacker can manipulate the protected system into sending an outgoing email message. Technical Description: A stack based buffer overflow vulnerability within vsmon.exe can be exploited to execute code with the context of the SYSTEM account. The vulnerability exists within the component responsible for processing the RCPT TO command argument. By specifying a large argument to the RCPT TO command an internal stack based buffer can be overflowed within the TrueVector Internet Monitor (vsmon.exe) process. Protection: Retina Network Security Scanner has been updated to identify this vulnerability. Vendor Status: ZoneLabs was contacted and within only a few days they produced an update to eliminate this vulnerability within their products. We would like to give special recognition to the responsiveness of ZoneLabs in creating a fix to protect their customers. http://download.zonelabs.com/bin/free/securityAlert/8.html Credit: Discovery: Riley Hassell Related Links: Retina Network Security Scanner - Free 15 Day Trial http://www.eeye.com/html/Products/Retina/index.html Greetings: All the other firewall vendors on our list. Copyright (c) 1998-2004 eEye Digital Security Permission is hereby granted for the redistribution of this alert electronically. It is not to be edited in any way without express consent of eEye. If you wish to reprint the whole or any part of this alert in any other medium excluding electronic medium, please e-mail alert () eEye com for permission. Disclaimer The information within this paper may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties with regard to this information. In no event shall the author be liable for any damages whatsoever arising out of or in connection with the use or spread of this information. Any use of this information is at the user's own risk. Feedback Please send suggestions, updates, and comments to: eEye Digital Security http://www.eEye.com info () eEye com - ISN is currently hosted by Attrition.org To unsubscribe email majordomo () attrition org with 'unsubscribe isn' in the BODY of the mail.