An elevation of privilege vulnerability exists when Windows AppX Deployment Service (AppXSVC) improperly handles hard links. An attacker wh…
An elevation of privilege vulnerability exists when Windows AppX Deployment Service (AppXSVC) improperly handles hard links. An attacker who successfully exploited this vulnerability could run processes in an elevated context. An attacker could then install programs; view, change or delete data. To exploit this vulnerability, an attacker would first have to log on to the system. An attacker could then run a specially crafted application that could exploit the vulnerability and take control of an affected system. The security update addresses the vulnerability by correcting how Windows AppX Deployment Service handles hard links.
The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.
https://cwe.mitre.org/data/definitions/59.html →Open in CWE collection →An attack of this type exploits a system's configuration that allows an adversary to either directly access an executable file, for example through shell access; or in a possible worst case allows an adversary to upload a file and then execute it. Web servers, ftp servers, and message oriented middleware systems which have many integration points are particularly vulnerable, because both the programmers and the administrators must be in synch regarding the interfaces and the correct privileges for each interface.
https://capec.mitre.org/data/definitions/17.html →Open in CAPEC collection →An attack of this type exploits a system's trust in configuration and resource files. When the executable loads the resource (such as an image file or configuration file) the attacker has modified the file to either execute malicious code directly or manipulate the target process (e.g. application server) to execute based on the malicious configuration parameters. Since systems are increasingly interrelated mashing up resources from local and remote sources the possibility of this attack occurring is high.
https://capec.mitre.org/data/definitions/35.html →Open in CAPEC collection →An attacker manipulates inputs to the target software which the target software passes to file system calls in the OS. The goal is to gain access to, and perhaps modify, areas of the file system that the target software did not intend to be accessible.
https://capec.mitre.org/data/definitions/76.html →Open in CAPEC collection →An adversary positions a symbolic link in such a manner that the targeted user or application accesses the link's endpoint, assuming that it is accessing a file with the link's name.
https://capec.mitre.org/data/definitions/132.html →Open in CAPEC collection →| Product | Vendor | Status |
|---|---|---|
| windows_10_1607 | * | Exploited |
| windows_10_1703 | * | Exploited |
| windows_10_1709 | * | Exploited |
| windows_10_1803 | * | Exploited |
| windows_10_1809 | * | Exploited |
| windows_10_1903 | * | Exploited |
| windows_server_1709 | * | Exploited |
| windows_server_1803 | * | Exploited |
| windows_server_1903 | * | Exploited |
| windows_server_2016 | * | Exploited |
| windows_server_2019 | * | Exploited |
| Windows | Microsoft | Exploited |
| Windows | Microsoft | Exploited |
| Windows | Microsoft | Exploited |
| Windows | Microsoft | Exploited |
| Windows | Microsoft | Exploited |
| Windows | Microsoft | Exploited |