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Windows AppX Deployment Service Local Privilege Escalation (CVE-2020-1488)

8/18/2020

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​The AppX Deployment Service (AppXSVC) on Microsoft Windows suffers from an arbitrary file/directory deletion vulnerability that could be triggered by standard non-privileged users due to improper user impersonation during the removal process of any application from the Windows App Store (also known as Microsoft Store) leading to an elevation of privileges attack. Now, before we dive into the finding details, let's briefly talk about the vulnerable service and Microsoft Store applications.

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    ACTIVELabs was created in 2018 to hunt and research undiscovered vulnerabilities, report them to vendors via responsible disclosure programs, publish advisories, develop and validate new patches, and to share this information for the advancement of the cybersecurity community. ACTIVELabs was established with the mission of securing our ever-growing client base, partnerships, and the technology community as a whole.
     
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