Dark Reading is part of the Informa Tech Division of Informa PLC

This site is operated by a business or businesses owned by Informa PLC and all copyright resides with them.Informa PLC's registered office is 5 Howick Place, London SW1P 1WG. Registered in England and Wales. Number 8860726.

Risk

7/20/2010
03:39 PM
Connect Directly
Twitter
RSS
E-Mail
50%
50%

Adobe To 'Sandbox' PDF Files

Upcoming security feature for Adobe Reader puts PDFs in protected mode

In the latest move to lock down its applications from attack, Adobe announced today it will add a default sandboxing feature to the next version of the Adobe Reader software. The new "Protected Mode" for Reader, which it will roll out later this year, will quarantine any operations to a confined and restricted space.

Adobe apps have been in the bull's eye as one of the most popular attack vectors, especially in the form of malware-laden PDF files. Adobe has been beefing up its security posture during the past year, starting with its automatic updater feature for Reader and Acrobat and a regular patching schedule. Another big piece of Adobe's security strategy is hardening its code against attacks, says Brad Arkin, senior director of product security and privacy. "Sandboxing was one of the early technology candidates we looked at" for code-hardening, he says.

The new Protected Mode feature is based on the sandboxing technique used by Microsoft in Office 2010 and by Google in its Chrome browser. The first release of the sandboxing feature will keep all "write" calls inside the protected space so that if a PDF is infected with malware, the malicious code can't spread outside that file to the system itself or to other files. The second phase of the Protected Mode release for Reader will prevent attackers from reading information on the victim machine's system via an infected PDF. "It will be harder for the bad guys to install malicious software or anything persistent on a computer that could survive from one reboot to [the next]," Arkin says.

Sandboxing basically quarantines any malware that's embedded in a PDF. "Real-world attacks today are almost always some variant of a memory trespass vulnerability," Arkin says. Sandboxing, which restricts what an attacker is able to do with a PDF file, should eliminate many of those types of threats, he says.

But the cat-and-mouse game between security experts and attackers will likely just move to another vector, he says. "Once we put this out, attackers will either move to another application or they might look for creative ways to work around it," he says.

Security experts welcomed Adobe's adoption of sandboxing, but they don't expect it to dissuade attackers from continuing to hammer away at Adobe apps. "Reader will continue to be a really big target for a while, even with the sandbox environment," says Andrew Storms, director of security operations at nCircle. "But we need to congratulate Adobe for another tool to help protect ourselves and our users."

Storms says the true weakest link is still the user. "The idea is to use the tools the vendors are giving you, but you still have to apply your own risk assessment," he says.

Adobe's Arkin says Adobe worked with Microsoft Office's security team, the Google Chrome team, as well as other outside experts in implementing the sandboxing technology in Reader. It's based on Microsoft's practical Windows sandboxing technique, and works like this in Reader: when Reader needs to execute any action not allowed in the sandbox such as launching an attachment inside a PDF file from another app, for example, that action gets vetted by a broker process with specific policies that prevent access to any functions that could open the system up to attack.

The goal is to stop attackers from writing files, changing registry keys, or installing malicious code via PDFs -- but without the user noticing any difference in the Reader app, Arkin says. "There's no performance impact, no change to the interface, no dialog box – it's just happening in the background. And users don't change the way they interact with PDFs," he says.

Sandboxing does not, however, prevent phishing or clickjacking attacks, he notes. "There's nothing we can do to protect against users who follow" links in infected PDFs purportedly from their banks, for example, he says.

Just how long sandboxing techniques will stand up to attacks is unclear. nCircle's Storms says attackers probably will come up with ways to subvert sandboxing much the way researchers have done with Microsoft's Address Space Layout Randomization (ASLR) and Data Execution Protection (DEP) security features. "The question is how quickly Adobe, Microsoft, and Google react" to any challenges to the technique, he says.

Have a comment on this story? Please click "Discuss" below. If you'd like to contact Dark Reading's editors directly, send us a message.

Kelly Jackson Higgins is the Executive Editor of Dark Reading. She is an award-winning veteran technology and business journalist with more than two decades of experience in reporting and editing for various publications, including Network Computing, Secure Enterprise ... View Full Bio

Comment  | 
Print  | 
More Insights
Comments
Newest First  |  Oldest First  |  Threaded View
Edge-DRsplash-10-edge-articles
7 Old IT Things Every New InfoSec Pro Should Know
Joan Goodchild, Staff Editor,  4/20/2021
News
Cloud-Native Businesses Struggle With Security
Robert Lemos, Contributing Writer,  5/6/2021
Commentary
Defending Against Web Scraping Attacks
Rob Simon, Principal Security Consultant at TrustedSec,  5/7/2021
Register for Dark Reading Newsletters
White Papers
Video
Cartoon
Current Issue
2021 Top Enterprise IT Trends
We've identified the key trends that are poised to impact the IT landscape in 2021. Find out why they're important and how they will affect you today!
Flash Poll
How Enterprises are Developing Secure Applications
How Enterprises are Developing Secure Applications
Recent breaches of third-party apps are driving many organizations to think harder about the security of their off-the-shelf software as they continue to move left in secure software development practices.
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2020-36289
PUBLISHED: 2021-05-12
Affected versions of Atlassian Jira Server and Data Center allow an unauthenticated user to enumerate users via an Information Disclosure vulnerability in the QueryComponentRendererValue!Default.jspa endpoint. The affected versions are before version 8.5.13, from version 8.6.0 before 8.13.5, and fro...
CVE-2021-32606
PUBLISHED: 2021-05-11
In the Linux kernel 5.11 through 5.12.2, isotp_setsockopt in net/can/isotp.c allows privilege escalation to root by leveraging a use-after-free. (This does not affect earlier versions that lack CAN ISOTP SF_BROADCAST support.)
CVE-2021-3504
PUBLISHED: 2021-05-11
A flaw was found in the hivex library in versions before 1.3.20. It is caused due to a lack of bounds check within the hivex_open function. An attacker could input a specially crafted Windows Registry (hive) file which would cause hivex to read memory beyond its normal bounds or cause the program to...
CVE-2021-20309
PUBLISHED: 2021-05-11
A flaw was found in ImageMagick in versions before 7.0.11 and before 6.9.12, where a division by zero in WaveImage() of MagickCore/visual-effects.c may trigger undefined behavior via a crafted image file submitted to an application using ImageMagick. The highest threat from this vulnerability is to ...
CVE-2021-20310
PUBLISHED: 2021-05-11
A flaw was found in ImageMagick in versions before 7.0.11, where a division by zero ConvertXYZToJzazbz() of MagickCore/colorspace.c may trigger undefined behavior via a crafted image file that is submitted by an attacker and processed by an application using ImageMagick. The highest threat from this...