In-Reply-To: <20030819205018.12485.qmail@www.securityfocus.com> Updated with correct URLs to further documentation in the message: Summary Recently, Macromedia became aware of a security issue with some of the server behaviors present in Dreamweaver MX, all versions of UltraDev, and two extensions that shipped as part of the Developer?s Resource Kit (DRK), vol. 2 and vol. 4. If exploited, it is possible for an attacker to gain access to certain site-specific cookie and session information. Solution Macromedia has issued downloadable patches for Dreamweaver MX and the effected Developers Resource Kit Extensions. These fixes will be incorporated into all future releases of Dreamweaver. After updating your product, you will need to reapply the server behaviors to the pages that use them, and redeploy those pages to your server. To download the patches for Dreamweaver MX and the effected Developers Resource Kit Extensions, please visit TechNote 18838 (http://www.macromedia.com/support/dreamweaver/ts/documents/security_updat e_0803.htm). For information on how to resolve this issue in UltraDev please visit TechNote 18839 (http://www.macromedia.com/support/ultradev/ts/documents/security_update_0 803.htm). For concerns or questions regarding this specific security bulletin, please email: DWMPSB0305@macromedia.com. Severity Rating Macromedia categorizes this issue as an important update and recommends that users update their product with the respective patch. Issue Macromedia has learned that the behavior issues, present in Dreamweaver MX, all versions of UltraDev, and two extensions included as part of the DRK vol. 2 and vol. 4, contain a flaw that if exploited may allow an attacker to gain access to certain site-specific cookie and session information. This situation arises because the server behavior uses a redirect based on a variable, but the variable is not URL encoded. This allows an attacker to write script which may ultimately be executed on a user's browser. Since the script is still subject to normal browser security, this vulnerability does not allow arbitrary access to the data on the users? machine, nor allow arbitrary code to run. Further, this does not allow access to information on the server, nor does it allow any code to be executed on the server. For a list of behaviors affected in Dreamweaver/DRK Server Behaviors, please visit TechNote 18838 (http://www.macromedia.com/support/dreamweaver/ts/documents/security_updat e_0803.htm). For a list of behaviors affected in UltraDev, please visit TechNote 18839 (http://www.macromedia.com/support/ultradev/ts/documents/security_update_0 803.htm). Revisions Bulletin first released on August 19, 2003. Reporting Security Issues Macromedia is committed to addressing security issues and providing customers with the information on how they can protect themselves. If you identify what you believe may be a security issue with a Macromedia product, please send an email to secure@macromedia.com. We will work to appropriately address and communicate the issue. Receiving Security Bulletins When Macromedia becomes aware of a security issue that we believe significantly affects our products or customers, we will notify customers when appropriate. Typically this notification will be in the form of a security bulletin explaining the issue and the response. Macromedia customers who would like to receive notification of new security bulletins when they are released can sign up for our security notification service. For additional information on security issues at Macromedia, please visit the Security Zone at: http://www.macromedia.com/security. 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