Adobe has confirmed the existence of another Flash player zero-day flaw similar to the vulnerability patched last month which was suspected of playing a critical role in the network breach of security vendor RSA, a division of EMC.
The RSA hack utilized an Excel email attachment with an embedded Flash file that contained malware enabling the attackers to use a version of the Poison Ivy remote administration tool (RAT) to glean authentication credentials and gain access to other systems in the company's network.
Adobe has acknowledged that the latest Flash vulnerability is currently being used in attacks, this time utilizing a Microsoft Word document with an embedded Flash file containing malware.
From the Adobe advisory:
A critical vulnerability exists in Flash Player 10.2.153.1 and earlier versions (Adobe Flash Player 10.2.154.25 and earlier for Chrome users) for Windows, Macintosh, Linux and Solaris, Adobe Flash Player 10.2.156.12 and earlier versions for Android, and the Authplay.dll component that ships with Adobe Reader and Acrobat X (10.0.2) and earlier 10.x and 9.x versions for Windows and Macintosh operating systems.
This vulnerability (CVE-2011-0611) could cause a crash and potentially allow an attacker to take control of the affected system. There are reports that this vulnerability is being exploited in the wild in targeted attacks via a Flash (.swf) file embedded in a Microsoft Word (.doc) file delivered as an email attachment, targeting the Windows platform.
At this time, Adobe is not aware of any attacks via PDF targeting Adobe Reader and Acrobat. Adobe Reader X Protected Mode mitigations would prevent an exploit of this kind from executing.
We are in the process of finalizing a schedule for delivering updates for Flash Player 10.2.x and earlier versions for Windows, Macintosh, Linux, Solaris and Android, Adobe Acrobat X (10.0.2) and earlier 10.x and 9.x versions for Windows and Macintosh, Adobe Reader X (10.0.2) for Macintosh, and Adobe Reader 9.4.3 and earlier 9.x versions for Windows and Macintosh.
Because Adobe Reader X Protected Mode would prevent an exploit of this kind from executing, we are currently planning to address this issue in Adobe Reader X for Windows with the next quarterly security update for Adobe Reader, currently scheduled for June 14, 2011.
Users may monitor the latest information on the Adobe Product Security Incident Response Team blog at http://blogs.adobe.com/psirt or by subscribing to the RSS feed at http://blogs.adobe.com/psirt/atom.xml.
Adobe actively shares information about this and other vulnerabilities with partners in the security community to enable them to quickly develop detection and quarantine methods to protect users until a patch is available. As always, Adobe recommends that users follow security best practices by keeping their anti-malware software and definitions up to date.