Entries Tagged "backdoors"

Page 18 of 20

Back Door in Battery Charger

Amazing:

The United States Computer Emergency Response Team (US-CERT) has warned that the software included in the Energizer DUO USB battery charger contains a backdoor that allows unauthorized remote system access.

That’s actually misleading. Even though the charger is an USB device, it does not contain the harmful installer described in the article—it has no storage capacity. The software has to be downloaded from the Energizer website, and the software is only used to monitor the progress of the charge. The software is not needed for the device to function properly.

Here are details.

Energizer has announced it will pull the software from its website, and also will stop selling the device.

EDITED TO ADD (3/23): Additional news here.

Posted on March 23, 2010 at 6:13 AMView Comments

Preparing for Cyberwar

Interesting article from The New York Times.

Because so many aspects of the American effort to develop cyberweapons and define their proper use remain classified, many of those officials declined to speak on the record. The White House declined several requests for interviews or to say whether Mr. Obama as a matter of policy supports or opposes the use of American cyberweapons.

The most exotic innovations under consideration would enable a Pentagon programmer to surreptitiously enter a computer server in Russia or China, for example, and destroy a “botnet”—a potentially destructive program that commandeers infected machines into a vast network that can be clandestinely controlled—before it could be unleashed in the United States.

Or American intelligence agencies could activate malicious code that is secretly embedded on computer chips when they are manufactured, enabling the United States to take command of an enemy’s computers by remote control over the Internet. That, of course, is exactly the kind of attack officials fear could be launched on American targets, often through Chinese-made chips or computer servers.

So far, however, there are no broad authorizations for American forces to engage in cyberwar. The invasion of the Qaeda computer in Iraq several years ago and the covert activity in Iran were each individually authorized by Mr. Bush. When he issued a set of classified presidential orders in January 2008 to organize and improve America’s online defenses, the administration could not agree on how to write the authorization.

I’ve written about cyberwar here.

Posted on April 30, 2009 at 2:18 PMView Comments

Blowfish on 24, Again

Three nights ago, my encryption algorithm Blowfish was mentioned on the Fox show 24. The clip is available here, or streaming on Hulu. This is the exchange:

Janis Gold: I isolated the data Renee uploaded to Bauer but I can’t get past the filed header.

Larry Moss: What does that mean?

JG: She encrypted the name and address she used and I can’t seem to crack it.

LM: Who can?

JG: She used her personal computer. This is very serious encryption. I mean, there are some high-level people who can do it.

LM: Like who?

JG: Chloe O’Brian, but from what you told me earlier she’s too loyal to Bauer.

LM: Is her husband still here?

JG: Yes, he’s waiting to see you.

LM: He’s a level 6 analyst too.

JG: Mr. O’Brian, a short time ago one of our agents was in touch with Jack Bauer. She sent a name and address that we assume is his next destination. Unfortunately, it’s encrypted with Blowfish 148 and no one here knows how to crack that. Therefore, we need your help, please.

Morris O’Brian: Show me the file.

MO: Where’s your information. 16 or 32 bit wavelength word length?

JG: 32.

MO: Native or modified data points?

JG: Native.

MO: The designer of this algorithm built a backdoor into his code. Decryption’s a piece of cake if you know the override codes.

LM: And you do?

MO: Yeah.

LM: Will this take long?

MO: Course not.

LM: Mr. O’Brian, can you tell me specifically when you’ll have the file decrypted?

MO: Yes.

MO: Now.

O’Brian spends just over 30 seconds at the keyboard.

This is the second time Blowfish has appeared on the show. It was broken the first time, too.

EDITED TO ADD (4/14): Avi Rubin comments.

Posted on March 19, 2009 at 12:18 PMView Comments

Another Conficker Variant

This is one well-designed piece of malware:

Conficker B++ is somewhat similar to Conficker B, with 294 of 297 sub-routines the same and 39 additional subroutines. The latest variant, first spotted on 16 February, is even more sneaky than its previous incarnations, SRI explains.

Conficker B++ is no longer limited to reinfection by similarly structured Conficker DLLs, but can now push new self-contained Win32 applications. These executables can infiltrate the host using methods that are not detected by the latest anti-Conficker security applications.

[…]

The malware also creates an additional backdoor on compromise machines to create an altogether trickier infectious agent, SRI explains.

In Conficker A and B, there appeared only one method to submit Win32 binaries to the digital signature validation path, and ultimately to the CreateProcess API call. This path required the use of the Internet rendezvous point to download the binary through an HTTP transaction.

Under Conficker B++, two new paths to binary validation and execution have been introduced to Conficker drones, both of which bypass the use of Internet Rendezvous points: an extension to the netapi32.dll patch and the new named pipe backdoor. These changes suggest a desire by the Conficker’s authors to move away from a reliance on Internet rendezvous points to support binary update, and toward a more direct flash approach.

SRI reckons that Conficker-A has infected 4.7m machines, at one time or another, while Conficker-B has hit 6.7m IP addresses. These figures, as with previous estimates, come from an analysis of the number of machines that have ever tried to call into malware update sites. The actual number of infected hosts at any one time is lower than that. SRI estimates the botnet controlled by Conficker-A and Conficker-B is around 1m and 3m hosts, respectively, or a third of the raw estimate.

Posted on February 24, 2009 at 5:23 AMView Comments

Designing a Malicious Processor

From the LEET ’08 conference: “Designing and implementing malicious hardware,” by Samuel T. King, Joseph Tucek, Anthony Cozzie, Chris Grier, Weihang Jiang, and Yuanyuan Zhou.

Abstract:

Hidden malicious circuits provide an attacker with a stealthy attack vector. As they occupy a layer below the entire software stack, malicious circuits can bypass traditional defensive techniques. Yet current work on trojan circuits considers only simple attacks against the hardware itself, and straightforward defenses. More complex designs that attack the software are unexplored, as are the countermeasures an attacker may take to bypass proposed defenses.

We present the design and implementation of Illinois Malicious Processors (IMPs). There is a substantial design space in malicious circuitry; we show that an attacker,
rather than designing one specific attack, can instead design hardware to support attacks. Such flexible hardware allows powerful, general purpose attacks, while remaining surprisingly low in the amount of additional hardware. We show two such hardware designs, and implement them in a real system. Further, we show three powerful attacks using this hardware, including login backdoor that gives an attacker complete and highlevel access to the machine. This login attack requires only 1341 additional gates: gates that can be used for other attacks as well. Malicious processors are more practical, more flexible, and harder to detect than an initial analysis would suggest.

Posted on October 16, 2008 at 12:39 PMView Comments

BlackBerry Giving Encryption Keys to Indian Government

RIM encrypts e-mail between BlackBerry devices and the server the server with 256-bit AES encryption. The Indian government doesn’t like this at all; they want to snoop on the data. RIM’s response was basically: That’s not possible. The Indian government’s counter was: Then we’ll ban BlackBerries. After months of threats, it looks like RIM is giving in to Indian demands and handing over the encryption keys.

EDITED TO ADD (5/27): News:

BlackBerry vendor Research-In-Motion (RIM) said it cannot hand over the message encrytion key to the government as its security structure does not allow any ‘third party’ or even the company to read the information transferred over its network.

EDITED TO ADD (7/2): Looks like they have resolved the impasse.

Posted on May 21, 2008 at 2:09 PMView Comments

Designing Processors to Support Hacking

This won best-paper award at the First USENIX Workshop on Large-Scale Exploits and Emergent Threats: “Designing and implementing malicious hardware,” by Samuel T. King, Joseph Tucek, Anthony Cozzie, Chris Grier, Weihang Jiang, and Yuanyuan Zhou.

Hidden malicious circuits provide an attacker with a stealthy attack vector. As they occupy a layer below the entire software stack, malicious circuits can bypass traditional defensive techniques. Yet current work on trojan circuits considers only simple attacks against the hardware itself, and straightforward defenses. More complex designs that attack the software are unexplored, as are the countermeasures an attacker may take to bypass proposed defenses.

We present the design and implementation of Illinois Malicious Processors (IMPs). There is a substantial design space in malicious circuitry; we show that an attacker, rather than designing one speci?c attack, can instead design hardware to support attacks. Such ?exible hardware allows powerful, general purpose attacks, while remaining surprisingly low in the amount of additional hardware. We show two such hardware designs, and implement them in a real system. Further, we show three powerful attacks using this hardware, including a login backdoor that gives an attacker complete and highlevel access to the machine. This login attack requires only 1341 additional gates: gates that can be used for other attacks as well. Malicious processors are more practical, more flexible, and harder to detect than an initial analysis would suggest.

Theoretical? Sure. But combine this with stories of counterfeit computer hardware from China, and you’ve got yourself a potentially serious problem.

Posted on April 24, 2008 at 1:52 PMView Comments

Sidebar photo of Bruce Schneier by Joe MacInnis.