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A security researcher has published today demo exploit code on GitHub for a Windows 10 zero-day vulnerability. The zero-day is what security researchers call a local privilege escalation (LPE). LPE vulnerabilities can't be used to break into systems, but hackers can use them at later stages in their attacks to elevate their access on compromised hosts from low-privileged to admin-level accounts. According to a description of the zero-day posted on GitHub, this vulnerability resides in the Windows Task Scheduler process. Attackers can run a malformed .job file that exploits a flaw in the way the Task Scheduler process changes DACL] (discretionary access control list) permissions for an individual file. When exploited, the vulnerability can elevate a hacker's low-privileged account to admin access, which, in turn, grants the intruder access over the entire system. The zero-day has only been tested and confirmed to work on Windows 10 32-bit systems. The researcher who released this zero-day is named SandboxEscaper and has a reputation for releasing Windows zero-days online, without notifying Microsoft of these security flaws. While there has been no reported exploitation for the last three, the first was incorporated in active malware campaigns a few weeks after its release. For more please navigate to OUR FORUM.

 

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