Adobe has released updates for the Flash Player and Shockwave Player to address vulnerabilities in the previous versions. In the case of the Flash vulnerability, Adobe says that there is an exploit available, but not whether it is being used in the wild.
The vulnerabilities in the old Flash Player are both critical and highest priority. The vulnerable versions are:
- Adobe Flash Player 11.9.900.152 and earlier versions for Windows and Macintosh
- Adobe Flash Player 184.108.40.2067 and earlier versions for Linux
- Adobe AIR 220.127.116.110 and earlier versions for Windows and Macintosh
- Adobe AIR 18.104.22.1680 and earlier versions for Android
- Adobe AIR 22.214.171.1240 SDK and earlier versions
- Adobe AIR 126.96.36.1990 SDK & Compiler and earlier versions
Flash Player users on Windows and Mac should update to version 11.9.900.170. Flash Player users on Linux should update to version 188.8.131.522. The current version of Google Chrome (31.0.1650.63) already integrates the current version of Flash Player, as does the latest versions of Internet Explorer 10 and 11.
The vulnerabilities in Flash could cause the player to crash or execute remote code. Adobe says that they are "...aware of reports that an exploit designed to trick the user into opening a Microsoft Word document with malicious Flash (.swf) content exists..." Adobe Flash Player has mitigated against this form of attack since version 11.6.
One of the Flash Player vulnerabilities is described in detail by its author, Attila Suszter of Reversing on Windows blog.
The Shockwave Player vulnerabilities could also result in remote code execution. Shockwave Player 184.108.40.206 and earlier versions on Windows and Mac are vulnerable. The new, fixed version is 220.127.116.11.
The new Flash Player may be downloaded here.
The new Shockwave Player may be downloaded here.