Adobe confirms Flash contains Microsoft dev code bug

Promises fix for Flash on Thursday; only IE users at risk

Adobe stepped forward yesterday to acknowledge that it's the first major third-party vendor to have used Microsoft's flawed development code in its products.

According to multiple security advisories posted to its site on Tuesday, the Windows versions of Adobe's Flash Player and Shockwave Player harbor vulnerabilities because Adobe used a buggy Microsoft code "library" during their development.

It's no surprise that Flash Player is vulnerable to attack. Three weeks ago a pair of German researchers reported finding numerous third-party applications that contain the flawed library code, and named Flash as an example.

Adobe patched Shockwave Player yesterday, and will follow that tomorrow with a previously-scheduled update for the far-more-popular Flash Player.

"We evaluated the impact of the vulnerable versions of the Microsoft Active Template Library (ATL) on the Adobe product portfolio [and] determined that Flash Player and Shockwave Player are the two products that leverage vulnerable versions of ATL," said Wendy Poland, of Adobe's security team in an company blog entry.

On Tuesday, Microsoft confirmed that the Active Template Library (ATL), a code library included with Visual Studio, contained multiple vulnerabilities, at least one harking back to early 2008. Although Microsoft patched Visual Studio to eliminate the bugs in ATL, those updates don't automatically fix software developed using the flawed library. Instead, vendors, including Microsoft, must use the patched Visual Studio to recompile their code, then distribute the new, secure software.

That's what Adobe did yesterday for Shockwave. In a security bulletin issued Tuesday, Adobe updated Shockwave Player to Version, noting that the patch fixed a critical vulnerability that could be used to hijack a Windows PC.

Flash Player will get the same treatment Thursday, Adobe promised. "Adobe Flash Player and, and earlier 9.x and 10.x versions installed on Windows operating systems for use with Internet Explorer leverage a vulnerable version of ATL," read an advisory posted yesterday. "We are in the process of developing a fix for the issue, and expect to provide an update for Flash Player v9 and v10 for Windows by July 30, 2009," Adobe said.

Last week, Adobe promised to patch Flash Player by tomorrow to address another bug that has been exploited in large numbers by criminals. According to Danish bug tracking firm Secunia, more than 92 per cent of all Windows users are vulnerable to the current Flash Player attacks.

Other Adobe software, including the popular Reader PDF viewer -- which will also be updated to close the same hole that has led to large-scale attacks -- does not contain the flawed ATL code, Poland said. The Adobe Reader plug-in for Internet Explorer is ATL-bug-free, she said, and although the flaws are baked into the Flash Player browser plug-in, only IE users are vulnerable. "People using Flash Player within the Firefox browser -- as well as all other Windows-based browsers that aren't Internet Explorer -- are not vulnerable," she noted.

One of the three bugs in ATL is rooted in a simple programming mistake: According to both Microsoft and outside researchers, the ATL function called "ATL::CComVariant::ReadFromStream" contains a single extraneous "&" character.

Until a patch for Flash is available, Adobe urged customers to "consider" installing Microsoft's MS09-034 update, which that company delivered Tuesday via Windows Update. Included in that IE update are new defensive measures that are supposed to detect and block ActiveX controls, like Flash Player and Shockwave Player, that were created using the buggy ATL.

Adobe will post links to the patched Flash Player on its security site.

Join the Good Gear Guide newsletter!

Error: Please check your email address.

Tags Microsoftadobeadobe flashInternet Explorer

Our Back to Business guide highlights the best products for you to boost your productivity at home, on the road, at the office, or in the classroom.

Keep up with the latest tech news, reviews and previews by subscribing to the Good Gear Guide newsletter.

Gregg Keizer

Show Comments

Cool Tech

ASUS ROG Swift PG279Q – Reign beyond virtual world

Learn more >

Crucial® BX200 SATA 2.5” 7mm (with 9.5mm adapter) Internal Solid State Drive

Learn more >

D-Link PowerLine AV2 2000 Gigabit Network Kit

Learn more >

D-Link TAIPAN AC3200 Ultra Wi-Fi Modem Router (DSL-4320L)

Learn more >

Lexar® Professional 1000x microSDHC™/microSDXC™ UHS-II cards

Learn more >

Xiro Drone Xplorer V -3 Axis Gimbal & 1080p Full HD 14MP Camera

Learn more >

Gadgets & Things

Lexar Professional 2000x SDHC™/SDXC™ UHS-II cards

Learn more >

Lexar® Professional 1000x microSDHC™/microSDXC™ UHS-II cards

Learn more >


Learn more >

Family Friendly

ASUS VivoPC VM62 - Incredibly Powerful, Unbelievably Small

Learn more >

Lexar® Professional 1000x microSDHC™/microSDXC™ UHS-II cards

Learn more >

Lexar Professional 2000x SDHC™/SDXC™ UHS-II cards

Learn more >

Stocking Stuffer

Lexar® Professional 1000x microSDHC™/microSDXC™ UHS-II cards

Learn more >

Lexar Professional 2000x SDHC™/SDXC™ UHS-II cards

Learn more >

Christmas Gift Guide

Click for more ›

Most Popular Reviews

Best Deals on Good Gear Guide

Latest News Articles


GGG Evaluation Team

Kathy Cassidy


First impression on unpacking the Q702 test unit was the solid feel and clean, minimalist styling.

Anthony Grifoni


For work use, Microsoft Word and Excel programs pre-installed on the device are adequate for preparing short documents.

Steph Mundell


The Fujitsu LifeBook UH574 allowed for great mobility without being obnoxiously heavy or clunky. Its twelve hours of battery life did not disappoint.

Andrew Mitsi


The screen was particularly good. It is bright and visible from most angles, however heat is an issue, particularly around the Windows button on the front, and on the back where the battery housing is located.

Simon Harriott


My first impression after unboxing the Q702 is that it is a nice looking unit. Styling is somewhat minimalist but very effective. The tablet part, once detached, has a nice weight, and no buttons or switches are located in awkward or intrusive positions.


Latest Jobs

Don’t have an account? Sign up here

Don't have an account? Sign up now

Forgot password?