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.

Vulnerabilities / Threats

Researcher Barred From US

Renowned security expert Halvar Flake denied travel from Germany after his Black Hat presentation is found in search

Halvar Flake, a speaker at this week's Black Hat conference, has been denied entry into the United States following the discovery of his presentation in his travel materials.

Flake, a pseudonym for Thomas Dullien, CEO and head of research at Sabre Labs, was scheduled to give a two-day training course on analyzing security vulnerabilities. But according to his blog, authorities had other ideas. (See X-Ray Vision for Bug Finders and 10 Hot Security Startups.)

"For four and a half hours I was interviewed about who exactly I am, why I am coming to the U.S., what the nature of my contract with Black Hat is, and why my training class is not performed by an American citizen," Flake writes. "After four hours, it became clear that a decision had been reached that I was to be denied entry to the U.S., on the grounds that since I am a private person conducting the trainings for Blackhat, I was essentially a Black Hat employee and would require an H1B visa to perform two days of trainings in the U.S."

Flake says he chose to present as a private individual instead of as an employee of his company because he had signed the deal with Black Hat years ago, before his company was formed, "and never got around to changing it." But customs officials said he cannot work for Black Hat without the proper visa. Flake says he has done many training courses in the U.S. before and has never been stopped by immigration.

Dullien was forced to return to Germany, where he plans to apply for a U.S. business visa.

"I need to wait until the American consulate opens, and then apply for a business visa. I have not been able to determine how long this might take -- estimates from customs officials ranged from 'four days' to 'more than six weeks,' " he writes.

— Tim Wilson, Site Editor, Dark Reading

  • Sabre Security GmbH

    Tim Wilson is Editor in Chief and co-founder of Dark Reading.com, UBM Tech's online community for information security professionals. He is responsible for managing the site, assigning and editing content, and writing breaking news stories. Wilson has been recognized as one ... View Full Bio

    Comment  | 
    Print  | 
    More Insights
  • Comments
    Newest First  |  Oldest First  |  Threaded View
    Attackers Leave Stolen Credentials Searchable on Google
    Kelly Sheridan, Staff Editor, Dark Reading,  1/21/2021
    How to Better Secure Your Microsoft 365 Environment
    Kelly Sheridan, Staff Editor, Dark Reading,  1/25/2021
    Register for Dark Reading Newsletters
    White Papers
    Video
    Cartoon Contest
    Write a Caption, Win an Amazon Gift Card! Click Here
    Latest Comment: I can't find the back door.
    Current Issue
    2020: The Year in Security
    Download this Tech Digest for a look at the biggest security stories that - so far - have shaped a very strange and stressful year.
    Flash Poll
    Assessing Cybersecurity Risk in Today's Enterprises
    Assessing Cybersecurity Risk in Today's Enterprises
    COVID-19 has created a new IT paradigm in the enterprise -- and a new level of cybersecurity risk. This report offers a look at how enterprises are assessing and managing cyber-risk under the new normal.
    Twitter Feed
    Dark Reading - Bug Report
    Bug Report
    Enterprise Vulnerabilities
    From DHS/US-CERT's National Vulnerability Database
    CVE-2021-21272
    PUBLISHED: 2021-01-25
    ORAS is open source software which enables a way to push OCI Artifacts to OCI Conformant registries. ORAS is both a CLI for initial testing and a Go Module. In ORAS from version 0.4.0 and before version 0.9.0, there is a "zip-slip" vulnerability. The directory support feature allows the ...
    CVE-2021-23901
    PUBLISHED: 2021-01-25
    An XML external entity (XXE) injection vulnerability was discovered in the Nutch DmozParser and is known to affect Nutch versions < 1.18. XML external entity injection (also known as XXE) is a web security vulnerability that allows an attacker to interfere with an application's processing of XML ...
    CVE-2020-17532
    PUBLISHED: 2021-01-25
    When handler-router component is enabled in servicecomb-java-chassis, authenticated user may inject some data and cause arbitrary code execution. The problem happens in versions between 2.0.0 ~ 2.1.3 and fixed in Apache ServiceComb-Java-Chassis 2.1.5
    CVE-2020-12512
    PUBLISHED: 2021-01-22
    Pepperl+Fuchs Comtrol IO-Link Master in Version 1.5.48 and below is prone to an authenticated reflected POST Cross-Site Scripting
    CVE-2020-12513
    PUBLISHED: 2021-01-22
    Pepperl+Fuchs Comtrol IO-Link Master in Version 1.5.48 and below is prone to an authenticated blind OS Command Injection.