JVN#45675516 Flash Player vulnerable in handling cross-domain policy files

Adobe Flash Player is a player for the Flash media format and enables frame-based animations with sound to be viewed within a web browser.
According to Adobe’s “About allowing cross-domain data loading”, “When a Flash document attempts to access data from another domain, Flash Player automatically attempts to load a policy file from that domain. If the domain of the Flash document that is attempting to access the data is included in the policy file, the data is automatically accessible.”
Flash Player contains a vulnerability that may allow a specially crafted web page to be interpreted as a cross-domain policy file because the plugin fails to properly handle cross-domain policy files.

Impact

Cross-domain policy restrictions can be bypassed by using a specially crafted web page. This could result in unauthorized access to website data contrary to the website administrator’s intent.

Solution

Update the Software
For Flash Player 8.x or Flash Player 9.x
Apply the latest updates provided by the vendor.

Apply the Patch
For Flash Player 7.x
Apply the appropriate patch as specified in the Flash Player update TechNote provided by the vendor.
The vendor has announced that they discontinued the support of Flash Player 7.x and will no longer provide security updates after this update. Those who are unable to upgrade to Flash Player 8.x or 9.x and wish to continue to use Flash Player 7.x can find the archived installers in the Archived Flash Player TechNote.

For more information, refer to the vendor’s website

Products Affected

• Flash Player 7.0.70.0 and earlier
• Flash Player 8.0.35.0 and earlier
• Flash Player 9.0.48.0 and earlier
  For details, see the information provided by the vendor.