Feeds

Researcher spies new Adobe code execution bug

Download Manager + web flaw = threat

  • alert
  • submit to reddit

5 things you didn’t know about cloud backup

A researcher has unearthed a bug in software used to install Adobe's ubiquitous Reader and Flash applications that can be exploited to remotely install malicious files on end user PCs.

The Adobe Download Manager is an ActiveX script that is invoked when people install or update Reader or Flash using Internet Explorer. Researcher Aviv Raff has figured out how to exploit it to install any file he wishes simply by tricking a user into clicking on a link on the Adobe.com domain.

The attack combines a vulnerability on Adobe's website with a defect in the download manager. The result: he was able to install and execute his own instance of the Windows calculator on a Register test machine. Aviv demonstrated the exploit on the condition further technical details be withheld.

"Instead of admitting that this design flaw is indeed a problem which can be abused by malicious attackers, Adobe decided to downplay this issue," Raff wrote here in disclosing the vulnerability. He was referring to unpublished comments an Adobe spokeswoman made to Zero Day blogger Ryan Naraine.

In part, the comments said the download manager "is designed to remove itself from the computer after use at the next restart," "can only be used to download the latest version of software hosted on Adobe.com," and "presents a very large user dialog box when downloading software."

But because the download manager remains on a machine until it is rebooted, attackers have ample opportunity to exploit the bug. Assuming the typical machine is restarted once every 24 to 72 hours, attacks have a reasonable chance of success as long as they are launched within the first one to three days of a recent update. (We're guessing a fair percentage of people would be unfazed by the dialog box).

And once that happens, attackers have the ability to remotely install malicious code on an untold millions of PCs, as the following screenshots suggest.

Screenshot of Adobe Download Manager
Screenshot of Windows caculator installed

In an email to El Reg in response to Raff's post, Adobe spokeswoman Wiebke Lips wrote: "Adobe is aware of the recently posted report of a remote code execution vulnerability in the Adobe Download Manager. We are working with the researcher, Aviv Raff, and the third party vendor of this component to investigate and resolve the issue as quickly as possible."

Updates will be posted on Adobe's PSIRT blog, she added.

As we suggested recently, the myriad bugs that over the past few years have routinely imperiled the entire internet have made Adobe the Toyota of the software industry. Company security personnel seem intent of correcting the problems, but the only way for that to happen is to launch a comprehensive initiative that makes a top-to-bottom review of the company's entire code base.

Adobe Download Manager would be as good a place as any to start. ®

The essential guide to IT transformation

More from The Register

next story
One HUNDRED FAMOUS LADIES exposed NUDE online
Celebrity women victimised as Apple iCloud accounts reportedly popped
Rubbish WPS config sees WiFi router keys popped in seconds
Another day, another way in to your home router
Goog says patch⁵⁰ your Chrome
64-bit browser loads cat vids FIFTEEN PERCENT faster!
NZ Justice Minister scalped as hacker leaks emails
Grab your popcorn: Subterfuge and slur disrupts election run up
HP: NORKS' cyber spying efforts actually a credible cyberthreat
'Sophisticated' spies, DIY tech and a TROLL ARMY – report
NIST to sysadmins: clean up your SSH mess
Too many keys, too badly managed
Scratched PC-dispatch patch patched, hatched in batch rematch
Windows security update fixed after triggering blue screens (and screams) of death
Attack flogged through shiny-clicky social media buttons
66,000 users popped by malicious Flash fudging add-on
New Snowden leak: How NSA shared 850-billion-plus metadata records
'Federated search' spaffed info all over Five Eyes chums
prev story

Whitepapers

Implementing global e-invoicing with guaranteed legal certainty
Explaining the role local tax compliance plays in successful supply chain management and e-business and how leading global brands are addressing this.
Endpoint data privacy in the cloud is easier than you think
Innovations in encryption and storage resolve issues of data privacy and key requirements for companies to look for in a solution.
Why cloud backup?
Combining the latest advancements in disk-based backup with secure, integrated, cloud technologies offer organizations fast and assured recovery of their critical enterprise data.
Consolidation: The Foundation for IT Business Transformation
In this whitepaper learn how effective consolidation of IT and business resources can enable multiple, meaningful business benefits.
High Performance for All
While HPC is not new, it has traditionally been seen as a specialist area – is it now geared up to meet more mainstream requirements?