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New Flaws in Top Antivirus Software Could Make Computers More Vulnerable

Submitted by: Daryl Haegley Director, Mission Assurance & Cyber Deterrence at the DOD and (CS)²AI Fellow

By Ravie Lakshmanan 10/05/20

Excerpt: “Chief among the flaws is the ability to delete files from arbitrary locations, allowing the attacker to delete any file in the system, as well as a file corruption vulnerability that permits a bad actor to eliminate the content of any file in the system. Per CyberArk, the bugs result from default DACLs (short for Discretionary Access Control Lists) for the "C:\ProgramData" folder of Windows, which are byapplications to store data for standard users without requiring additional permissions. Given that every user has both write and delete permission on the base level of the directory, it raises the likelihood of a privilege escalation when a non-privileged process creates a new folder in "ProgramData" that could be later accessed by a privileged process.”

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