The Cisco IronPort Desktop Flag Plug-in for Outlook enables Microsoft Outlook users to encrypt email messages via a Cisco IronPort Encryption Appliance or Email Security Appliance. In order to cause an email message to be encrypted, a user must click the Send Secure button to securely deliver the email message. If multiple email messages are being composed simultaneously and the Send Secure button is used to send more than one of the email messages, an error condition may occur where only the first email message sent is successfully encrypted. The remaining email messages sent using the Send Secure button will not be encrypted and may result in the disclosure of sensitive information if intercepted by an unauthorized party. There is a workaround for this issue. Below is an example image showing a Microsoft Outlook email composition window with the Cisco Ironport Flag Plug-in for Outlook installed. Users with no Send Secure icon in their Outlook client do not have the plug-in installed and are not affected. This response is posted at: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20100511-ironport Additional Information Cisco IronPort Desktop Flag Plug-in for Outlook versions from 6.2.4.3 up to, but not including, 6.5.0-006 are affected by this issue. Cisco IronPort is currently developing a software fix that will be available via the Cisco IronPort support website. This Security Response will be updated once version information for the fixed software is available. This issue is documented in Cisco IronPort bug 65623 and has been assigned Common Vulnerabilities and Exposures (CVE) identifier CVE-2010-1568. Workaround It is possible to mitigate this issue by ensuring that only one email composition window is open when using the Send Secure button. Secure email messages should be composed one at a time until a fixed version of the Cisco IronPort Desktop Flag Plug-in for Outlook can be installed. Obtaining Fixed Software Cisco IronPort Desktop Flag Plug-in for Outlook version 6.5.1 that contains the software fix for this issue can be obtained from the Cisco IronPort support portal by customers with a registered login. End users will need to obtain the fixed software from their internal support organization. Cisco IronPort Desktop Flag Plug-in for Outlook is directly supported by Cisco IronPort. Customers should contact Cisco IronPort technical support at the link below to obtain software fixes. Cisco IronPort technical support will assist customers in determining the correct fixes and installation procedures. Customers should direct all warranty questions to IronPort technical support. Note: Do not contact psirt@cisco.com or security-alert@cisco.com for software upgrades. http://www.ironport.com/support/contact_support.html Cisco Security Procedures Complete information on reporting security vulnerabilities in Cisco products, obtaining assistance with security incidents, and registering to receive security information from Cisco, is available on Cisco's worldwide website at http://www.cisco.com/web/about/security/psirt/security_vulnerability_policy.html. This includes instructions for press inquiries regarding Cisco security notices. All Cisco security advisories are available at http://www.cisco.com/go/psirt.
The Cisco IronPort Desktop Flag Plug-in for Outlook enables Microsoft Outlook users to encrypt email messages via a Cisco IronPort Encryption Appliance or Email Security Appliance. In order to cause an email message to be encrypted, a user must click the Send Secure button to securely deliver the email message.
If multiple email messages are being composed simultaneously and the Send Secure button is used to send more than one of the email messages, an error condition may occur where only the first email message sent is successfully encrypted. The remaining email messages sent using the Send Secure button will not be encrypted and may result in the disclosure of sensitive information if intercepted by an unauthorized party.
There is a workaround for this issue.
Below is an example image showing a Microsoft Outlook email composition window with the Cisco Ironport Flag Plug-in for Outlook installed. Users with no Send Secure icon in their Outlook client do not have the plug-in installed and are not affected.
This response is posted at: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20100511-ironport
Cisco IronPort Desktop Flag Plug-in for Outlook versions from 6.2.4.3 up to, but not including, 6.5.0-006 are affected by this issue. Cisco IronPort is currently developing a software fix that will be available via the Cisco IronPort support website. This Security Response will be updated once version information for the fixed software is available.
This issue is documented in Cisco IronPort bug 65623 and has been assigned Common Vulnerabilities and Exposures (CVE) identifier CVE-2010-1568.
It is possible to mitigate this issue by ensuring that only one email composition window is open when using the Send Secure button. Secure email messages should be composed one at a time until a fixed version of the Cisco IronPort Desktop Flag Plug-in for Outlook can be installed.
Cisco IronPort Desktop Flag Plug-in for Outlook version 6.5.1 that contains the software fix for this issue can be obtained from the Cisco IronPort support portal by customers with a registered login. End users will need to obtain the fixed software from their internal support organization.
Cisco IronPort Desktop Flag Plug-in for Outlook is directly supported by Cisco IronPort. Customers should contact Cisco IronPort technical support at the link below to obtain software fixes. Cisco IronPort technical support will assist customers in determining the correct fixes and installation procedures. Customers should direct all warranty questions to IronPort technical support.
Note: Do not contact psirt@cisco.com or security-alert@cisco.com for software upgrades.
http://www.ironport.com/support/contact_support.html
Complete information on reporting security vulnerabilities in Cisco products, obtaining assistance with security incidents, and registering to receive security information from Cisco, is available on Cisco's worldwide website at http://www.cisco.com/web/about/security/psirt/security_vulnerability_policy.html. This includes instructions for press inquiries regarding Cisco security notices. All Cisco security advisories are available at http://www.cisco.com/go/psirt.
To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy. This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco.
| Version | Description | Section | Date |
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Revision 1.1 |
Added fixed software information |
2010-May-24 |
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Revision 1.0 |
Initial public release. |
2010-May-11 |
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