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Update Protection against Outlook Web Access HTML Parsing Cross-Site Scripting Vulnerability (MS08-039)

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Check Point Reference: CPAI-2008-094
Date Published:
Severity:
Source: Microsoft Security Bulletin MS08-039
Industry Reference(s): CVE-2008-2248
Protection Provided by: VPN-1
  • NGX R65
  • NGX R62
  • NGX R61
  • NGX R60
VSX
  • NGX R65
InterSpect
  • NGX
Connectra
  • NGX R62
  • NGX R61
Who is Vulnerable?
Microsoft Exchange Server 2003 SP2
Microsoft Exchange Server 2007
Microsoft Exchange Server 2007 SP1
Vulnerability Description
A cross-site scripting vulnerability has been detected in Outlook Web Access. Outlook Web Access (OWA) is a webmail service of Microsoft Exchange Server 5.0 and later. The web interface of OWA resembles the interface in Microsoft Outlook. Cross-site scripting (XSS) could enable an attacker to inject code into a user's session with a Web site. A remote attacker may exploit this vulnerability to gain access to a user’s OWA session data allowing elevation of privilege.
Update/Patch Available
Apply patches:
Microsoft Security Bulletin MS08-039
Vulnerability Details
The vulnerability is a result of OWA incorrectly parsing HTML when opening e-mail from within OWA. An attacker could exploit this vulnerability by sending a specially crafted e-mail message that contains a malicious script to the victim. Successful exploitation of this issue could allow the attacker to login to the OWA session, leading to elevation of privilege.

Protection Overview
By enabling this protection, SmartDefense will detect and block the transfer over SMTP of malformed e-mail messages attempting to exploit this vulnerability.

In order for the protection to be activated, update your VPN-1 product to the latest SmartDefense update. For information on how to update SmartDefense, go to SBP-2006-05, Protection tab and select the version of your choice.

To configure the defense, select your product from the list below and follow the related protection steps.

VPN-1 NGX R65 & R62

How Can I Protect My Network?
1. In the SmartDefense tab, click Application Intelligence > SMTP > Block Outlook Web Access Cross-Site Scripting Vulnerability (MS08-039).
2. In the configuration pane, under Settings > Mode, check Active.
3. Install policy on all modules.

How Do I Know if My Network is Under Attack?
SmartView Tracker will log the following entries:

Attack Name: SMTP Protection Violation
Attack Information: Outlook Web Access cross-site scripting vulnerability (MS08-039)

VPN-1 NGX R61 & R60

How Can I Protect My Network?
1. In the SmartDefense tree, click Application Intelligence > SMTP.
2. Select the following:

Block Outlook Web Access Cross-Site Scripting Vulnerability (MS08-039)

3. Install policy on all modules.

How Do I Know if My Network is Under Attack?
SmartView Tracker will log the following entries:

Attack Name: SMTP Protection Violation
Attack Information: Outlook Web Access cross-site scripting vulnerability (MS08-039)

VPN-1 VSX NGX R65

How Can I Protect My Network?
1. In the SmartDefense tab, click Application Intelligence > SMTP > Block Outlook Web Access Cross-Site Scripting Vulnerability (MS08-039).
2. In the configuration pane, under Settings > Mode, check Active.
3. Install policy on all modules.

How Do I Know if My Network is Under Attack?
SmartView Tracker will log the following entries:

Attack Name: SMTP Protection Violation
Attack Information: Outlook Web Access cross-site scripting vulnerability (MS08-039)

InterSpect NGX

How Can I Protect My Network?
1. In the left pane, select Profiles > Default Protection and select the SmartDefense page of the profile.
2. In the SmartDefense tree, click Application Intelligence > SMTP.
3. Select the following protection:

Block Outlook Web Access Cross-Site Scripting Vulnerability (MS08-039)

4. Install security policy on all modules.

How Do I Know if My Network is Under Attack?
SmartView Tracker will log the following entries:

Attack Name: SMTP Protection Violation
Attack Information: Outlook Web Access cross-site scripting vulnerability (MS08-039)

Connectra NGX R62 & R61

How Can I Protect My Network?
1. In the left-hand menu, click Security > SmartDefense > Application Intelligence.
2. In the Dynamic Attacks pane, select the following:

Block Outlook Web Access Cross-Site Scripting Vulnerability (MS08-039)

3. Install policy on all modules.

How Do I Know if My Network is Under Attack?
Upon attack, the following entries will be logged:

Attack Name: SMTP Protection Violation
Attack Information: Outlook Web Access cross-site scripting vulnerability (MS08-039)