Almost all Windows users vulnerable to Flash zero-day attacks
Over 90% of PCs run at-risk Flash, 48% have buggy Reader, says Secunia
Computerworld - More than 9 out of every 10 Windows users are vulnerable to the Flash zero-day vulnerability that Adobe won't patch until Thursday, a Danish security company said today.
According to Secunia, 92% of the 900,000 users who have recently run the company's Personal Software Inspector (PSI) utility have Flash Player 10 on their PCs, while 31% have Flash Player 9. (The total exceeds 100% because some users have installed both.)
The most-current versions of Flash Player -- 184.108.40.206 and 10.0.22.87) -- are vulnerable to hackers conducting drive-by attacks hosted on malicious and legitimate-but-compromised sites. Antivirus vendors have reported hundreds, in some cases thousands, of sites launching drive-bys against Flash.
Secunia's PSI also pegged the installed base of the current Adobe Reader 9.1.2 and Abode Acrobat 9.1.2 at 48% and 2%, respectively. Because both include an interpreter to handle Flash content embedded in PDF files, they also can be exploited. The initial attacks, in fact, were based on rigged PDFs.
Adobe has acknowledged that Flash, Reader and Acrobat contain a critical bug. Last Wednesday, it kicked its security process into high gear, promising it would deliver patches for Flash by July 30, and fixes for Reader and Acrobat by July 31.
Until then, users have few options other than to delete, disable or rename the flawed component, "authplay.dll;" Adobe has posted terse instructions in a security bulletin, as have other organizations, including the U.S. Computer Emergency Response Team (US-CERT).
The bug at the root of the vulnerability was first logged in Adobe's bug tracking database nearly seven months ago, at the end of 2008.
PSI scans Windows systems for installed applications, then compares their version numbers to the most up-to-date editions; if they're different, it makes note, then provides a link to the patch update. "[A] PC user with vulnerabilities in his installed software, is like a house owner with open or unlocked doors," said Mikkel Winther, the manager of Secunia's PSI partner program, in an e-mail. "Maybe nobody will rob his house or compromise his system, but it is indeed possible and he hasn't secured himself against it."
Adobe has been faced with one security emergency after another this year. In mid-March, it patched several Reader vulnerabilities, then followed that with two more updates in May and June. Also last week, after Secunia noticed that Adobe continued to provide an outdated edition of Reader for download from its Web site, Adobe said it might change how its software updater worked.
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Read more about Security in Computerworld's Security Topic Center.
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