Bare Knuckled Antivirus Breaking

Author: b

Endpoint security products provide an attractive target for attackers because of their widespread use and high-privileged access to system resources. Researchers have already demonstrated the risks of complex input parsing with unmanaged code and even sloppy implementation of client- and server-side components of these products. While these attacks are still relevant, it is still generally overlooked how security software breaches some important security boundaries of the operating system. In this research we first present a generic self-defense bypass technique that allows deactivation of multiple endpoint security products. Then we demonstrate that self-defense can hide exploitable attack surface by exploiting local privilege escalation vulnerabilities in 6 products of 3 different vendors. You can download our whitepaper here:

Bare-Knuckled Antivirus Breaking (PDF)

The following part of this blog post contains demonstration videos and some additional notes about the exploits described in the paper. We will also use this post to publish up-to-date information about affected vendors and fixes.

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