Author Posts: Yaron Zinar

Yaron Zinar
Security Researcher
The research team lead at Preempt, Yaron has also worked in software development for Microsoft and the Israel Defense Forces. He holds a degree in Computer Engineering and a masters degree in computer science.

Security Advisory: Integer Overflow in Active Directory (CVE-2020-1267)

Posted on July 14, 2020 by Yaron Zinar

On July 14, 2020 Patch Tuesday, Microsoft released a patch for CVE-2020-1267, an important vulnerability in the Active Directory (AD)...
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Maze Ransomware Analysis and Protection

Posted on May 15, 2020 by Yaron Zinar

Last month, an IT services giant, acknowledged it was a victim of a Maze ransomware attack. Maze ransomware is a...
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NTLM Reflection Attack? Not for Preempt Customers

Posted on November 13, 2019 by Yaron Zinar

NTLM strikes again! Microsoft released a patch this week, CVE-2019-1384, which addresses a bypass vulnerability that allows attackers to successfully...
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Security Advisory: Targeting AD FS With External Brute-Force Attacks

Posted on July 9, 2019 by Yaron Zinar

On July 2019 Patch Tuesday, Microsoft released a patch for CVE-2019-1126, an important vulnerability discovered by Preempt Research Labs. The...
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How to Easily Bypass EPA to Compromise any Web Server that Supports Windows Integrated Authentication

Posted on June 11, 2019 by Yaron Zinar

As announced in our recent security advisory, Preempt researchers discovered how to bypass the Enhanced Protection for Authentication (EPA) mechanism...
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