Tracking Users on Waze

A security researcher discovered a wulnerability in Waze that breaks the anonymity of users:

I found out that I can visit Waze from any web browser at waze.com/livemap so I decided to check how are those driver icons implemented. What I found is that I can ask Waze API for data on a location by sending my latitude and longitude coordinates. Except the essential traffic information, Waze also sends me coordinates of other drivers who are nearby. What caught my eyes was that identification numbers (ID) associated with the icons were not changing over time. I decided to track one driver and after some time she really appeared in a different place on the same road.

The vulnerability has been fixed. More interesting is that the researcher was able to de-anonymize some of the Waze users, proving yet again that anonymity is hard when we’re all so different.

Posted on October 29, 2020 at 9:52 AM4 Comments

The NSA is Refusing to Disclose its Policy on Backdooring Commercial Products

Senator Ron Wyden asked, and the NSA didn’t answer:

The NSA has long sought agreements with technology companies under which they would build special access for the spy agency into their products, according to disclosures by former NSA contractor Edward Snowden and reporting by Reuters and others.

These so-called back doors enable the NSA and other agencies to scan large amounts of traffic without a warrant. Agency advocates say the practice has eased collection of vital intelligence in other countries, including interception of terrorist communications.

The agency developed new rules for such practices after the Snowden leaks in order to reduce the chances of exposure and compromise, three former intelligence officials told Reuters. But aides to Senator Ron Wyden, a leading Democrat on the Senate Intelligence Committee, say the NSA has stonewalled on providing even the gist of the new guidelines.

[…]

The agency declined to say how it had updated its policies on obtaining special access to commercial products. NSA officials said the agency has been rebuilding trust with the private sector through such measures as offering warnings about software flaws.

“At NSA, it’s common practice to constantly assess processes to identify and determine best practices,” said Anne Neuberger, who heads NSA’s year-old Cybersecurity Directorate. “We don’t share specific processes and procedures.”

Three former senior intelligence agency figures told Reuters that the NSA now requires that before a back door is sought, the agency must weigh the potential fallout and arrange for some kind of warning if the back door gets discovered and manipulated by adversaries.

The article goes on to talk about Juniper Networks equipment, which had the NSA-created DUAL_EC PRNG backdoor in its products. That backdoor was taken advantage of by an unnamed foreign adversary.

Juniper Networks got into hot water over Dual EC two years later. At the end of 2015, the maker of internet switches disclosed that it had detected malicious code in some firewall products. Researchers later determined that hackers had turned the firewalls into their own spy tool here by altering Juniper’s version of Dual EC.

Juniper said little about the incident. But the company acknowledged to security researcher Andy Isaacson in 2016 that it had installed Dual EC as part of a “customer requirement,” according to a previously undisclosed contemporaneous message seen by Reuters. Isaacson and other researchers believe that customer was a U.S. government agency, since only the U.S. is known to have insisted on Dual EC elsewhere.

Juniper has never identified the customer, and declined to comment for this story.

Likewise, the company never identified the hackers. But two people familiar with the case told Reuters that investigators concluded the Chinese government was behind it. They declined to detail the evidence they used.

Okay, lots of unsubstantiated claims and innuendo here. And Neuberger is right; the NSA shouldn’t share specific processes and procedures. But as long as this is a democratic country, the NSA has an obligation to disclose its general processes and procedures so we all know what they’re doing in our name. And if it’s still putting surveillance ahead of security.

Posted on October 28, 2020 at 9:40 AM16 Comments

Reverse-Engineering the Redactions in the Ghislaine Maxwell Deposition

Slate magazine was able to cleverly read the Ghislaine Maxwell deposition and reverse-engineer many of the redacted names.

We’ve long known that redacting is hard in the modern age, but most of the failures to date have been a result of not realizing that covering digital text with a black bar doesn’t always remove the text from the underlying digital file. As far as I know, this reverse-engineering technique is new.

EDITED TO ADD: A similar technique was used in 1991 to recover the Dead Sea Scrolls.

Posted on October 27, 2020 at 6:34 AM31 Comments

IMSI-Catchers from Canada

Gizmodo is reporting that Harris Corp. is no longer selling Stingray IMSI-catchers (and, presumably, its follow-on models Hailstorm and Crossbow) to local governments:

L3Harris Technologies, formerly known as the Harris Corporation, notified police agencies last year that it planned to discontinue sales of its surveillance boxes at the local level, according to government records. Additionally, the company would no longer offer access to software upgrades or replacement parts, effectively slapping an expiration date on boxes currently in use. Any advancements in cellular technology, such as the rollout of 5G networks in most major U.S. cities, would render them obsolete.

The article goes on to talk about replacement surveillance systems from the Canadian company Octasic.

Octasic’s Nyxcell V800 can target most modern phones while maintaining the ability to capture older GSM devices. Florida’s state police agency described the device, made for in-vehicle use, as capable of targeting eight frequency bands including GSM (2G), CDMA2000 (3G), and LTE (4G).

[…]

A 2018 patent assigned to Octasic claims that Nyxcell forces a connection with nearby mobile devices when its signal is stronger than the nearest legitimate cellular tower. Once connected, Nyxcell prompts devices to divulge information about its signal strength relative to nearby cell towers. These reported signal strengths (intra-frequency measurement reports) are then used to triangulate the position of a phone.

Octasic appears to lean heavily on the work of Indian engineers and scientists overseas. A self-published biography of the company notes that while the company is headquartered in Montreal, it has “R&D facilities in India,” as well as a “worldwide sales support network.” Nyxcell’s website, which is only a single page requesting contact information, does not mention Octasic by name. Gizmodo was, however, able to recover domain records identifying Octasic as the owner.

Posted on October 26, 2020 at 6:53 AM21 Comments

New Report on Police Decryption Capabilities

There is a new report on police decryption capabilities: specifically, mobile device forensic tools (MDFTs). Short summary: it’s not just the FBI that can do it.

This report documents the widespread adoption of MDFTs by law enforcement in the United States. Based on 110 public records requests to state and local law enforcement agencies across the country, our research documents more than 2,000 agencies that have purchased these tools, in all 50 states and the District of Columbia. We found that state and local law enforcement agencies have performed hundreds of thousands of cellphone extractions since 2015, often without a warrant. To our knowledge, this is the first time that such records have been widely disclosed.

Lots of details in the report. And in this news article:

At least 49 of the 50 largest U.S. police departments have the tools, according to the records, as do the police and sheriffs in small towns and counties across the country, including Buckeye, Ariz.; Shaker Heights, Ohio; and Walla Walla, Wash. And local law enforcement agencies that don’t have such tools can often send a locked phone to a state or federal crime lab that does.

[…]

The tools mostly come from Grayshift, an Atlanta company co-founded by a former Apple engineer, and Cellebrite, an Israeli unit of Japan’s Sun Corporation. Their flagship tools cost roughly $9,000 to $18,000, plus $3,500 to $15,000 in annual licensing fees, according to invoices obtained by Upturn.

Posted on October 23, 2020 at 8:47 AM24 Comments

NSA Advisory on Chinese Government Hacking

The NSA released an advisory listing the top twenty-five known vulnerabilities currently being exploited by Chinese nation-state attackers.

This advisory provides Common Vulnerabilities and Exposures (CVEs) known to be recently leveraged, or scanned-for, by Chinese state-sponsored cyber actors to enable successful hacking operations against a multitude of victim networks. Most of the vulnerabilities listed below can be exploited to gain initial access to victim networks using products that are directly accessible from the Internet and act as gateways to internal networks. The majority of the products are either for remote access (T1133) or for external web services (T1190), and should be prioritized for immediate patching.

Posted on October 21, 2020 at 9:21 AM14 Comments

Cybersecurity Visuals

The Hewlett Foundation just announced its top five ideas in its Cybersecurity Visuals Challenge. The problem Hewlett is trying to solve is the dearth of good visuals for cybersecurity. A Google Images Search demonstrates the problem: locks, fingerprints, hands on laptops, scary looking hackers in black hoodies. Hewlett wanted to go beyond those tropes.

I really liked the idea, but find the results underwhelming. It’s a hard problem.

Hewlett press release.

Posted on October 20, 2020 at 6:29 AM28 Comments

Split-Second Phantom Images Fool Autopilots

Researchers are tricking autopilots by inserting split-second images into roadside billboards.

Researchers at Israel’s Ben Gurion University of the Negev … previously revealed that they could use split-second light projections on roads to successfully trick Tesla’s driver-assistance systems into automatically stopping without warning when its camera sees spoofed images of road signs or pedestrians. In new research, they’ve found they can pull off the same trick with just a few frames of a road sign injected on a billboard’s video. And they warn that if hackers hijacked an internet-connected billboard to carry out the trick, it could be used to cause traffic jams or even road accidents while leaving little evidence behind.

[…]

In this latest set of experiments, the researchers injected frames of a phantom stop sign on digital billboards, simulating what they describe as a scenario in which someone hacked into a roadside billboard to alter its video. They also upgraded to Tesla’s most recent version of Autopilot known as HW3. They found that they could again trick a Tesla or cause the same Mobileye device to give the driver mistaken alerts with just a few frames of altered video.

The researchers found that an image that appeared for 0.42 seconds would reliably trick the Tesla, while one that appeared for just an eighth of a second would fool the Mobileye device. They also experimented with finding spots in a video frame that would attract the least notice from a human eye, going so far as to develop their own algorithm for identifying key blocks of pixels in an image so that a half-second phantom road sign could be slipped into the “uninteresting” portions.

The paper:

Abstract: In this paper, we investigate “split-second phantom attacks,” a scientific gap that causes two commercial advanced driver-assistance systems (ADASs), Telsa Model X (HW 2.5 and HW 3) and Mobileye 630, to treat a depthless object that appears for a few milliseconds as a real obstacle/object. We discuss the challenge that split-second phantom attacks create for ADASs. We demonstrate how attackers can apply split-second phantom attacks remotely by embedding phantom road signs into an advertisement presented on a digital billboard which causes Tesla’s autopilot to suddenly stop the car in the middle of a road and Mobileye 630 to issue false notifications. We also demonstrate how attackers can use a projector in order to cause Tesla’s autopilot to apply the brakes in response to a phantom of a pedestrian that was projected on the road and Mobileye 630 to issue false notifications in response to a projected road sign. To counter this threat, we propose a countermeasure which can determine whether a detected object is a phantom or real using just the camera sensor. The countermeasure (GhostBusters) uses a “committee of experts” approach and combines the results obtained from four lightweight deep convolutional neural networks that assess the authenticity of an object based on the object’s light, context, surface, and depth. We demonstrate our countermeasure’s effectiveness (it obtains a TPR of 0.994 with an FPR of zero) and test its robustness to adversarial machine learning attacks.

Posted on October 19, 2020 at 6:28 AM30 Comments

Sidebar photo of Bruce Schneier by Joe MacInnis.