CVE-2019-1170
An elevation of privilege vulnerability exists when reparse points are created by sandboxed processes allowing sandbox escape.
Public exploit code
Working exploit or proof of concept code has been published for this vulnerability. Treat unpatched systems as at risk.
- Microsoft Windows 10 - SET_REPARSE_POINT_EX Mount Point Security Feature Bypass2019-08-26 · local · windows · Verified
Impact
An elevation of privilege vulnerability exists when reparse points are created by sandboxed processes allowing sandbox escape. An attacker who successfully exploited the vulnerability could use the sandbox escape to elevate privileges on an affected system. To exploit the vulnerability, an attacker would first have to log on to the system, and then run a specially crafted application to take control over the affected system. The security update addresses the vulnerability by preventing sandboxed processes from creating reparse points targeting inaccessible files.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Microsoft | Windows 10 | Versions 1809, 1903 |
| Microsoft | Windows Server 2016 | Version 1903 |
| Microsoft | Windows Server 2019 | All versions |
Weakness classification
References
- NVD record
- CVE.org record
- http://packetstormsecurity.com/files/154192/Microsoft-Windows-SET_REPARSE_POINT_EX-Mount-Point-Security-Feature-Bypass.html
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1170
- http://packetstormsecurity.com/files/154192/Microsoft-Windows-SET_REPARSE_POINT_EX-Mount-Point-Security-Feature-Bypass.html
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1170