<p>An elevation of privilege vulnerability exists in Microsoft Windows when Folder redirection has been enabled via Group Policy. When folder redirection file server is co-located with Terminal server, an attacker who successfully exploited the vulnerability would be able to begin redirecting another user's personal data to a created folder.</p>
<p>To exploit the vulnerability, an attacker can create a new folder under the Folder Redirection root path and create a junction on a newly created User folder. When the new user logs in, Folder Redirection would start redirecting to the folder and copying personal data.</p>
<p>This elevation of privilege vulnerability can only be addressed by reconfiguring Folder Redirection with Offline files and restricting permissions, and NOT via a security update for affected Windows Servers. See the <strong>FAQ</strong> section of this CVE for configuration guidance.</p>
References
| Link | Resource |
|---|---|
| https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26887 | Patch Vendor Advisory |
| https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26887 | Patch Vendor Advisory |
Configurations
Configuration 1 (hide)
|
History
21 Nov 2024, 05:56
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26887 - Patch, Vendor Advisory |
29 Dec 2023, 20:15
| Type | Values Removed | Values Added |
|---|---|---|
| Summary | <p>An elevation of privilege vulnerability exists in Microsoft Windows when Folder redirection has been enabled via Group Policy. When folder redirection file server is co-located with Terminal server, an attacker who successfully exploited the vulnerability would be able to begin redirecting another user's personal data to a created folder.</p> <p>To exploit the vulnerability, an attacker can create a new folder under the Folder Redirection root path and create a junction on a newly created User folder. When the new user logs in, Folder Redirection would start redirecting to the folder and copying personal data.</p> <p>This elevation of privilege vulnerability can only be addressed by reconfiguring Folder Redirection with Offline files and restricting permissions, and NOT via a security update for affected Windows Servers. See the <strong>FAQ</strong> section of this CVE for configuration guidance.</p> |
Information
Published : 2021-03-11 16:15
Updated : 2024-11-21 05:56
NVD link : CVE-2021-26887
Mitre link : CVE-2021-26887
CVE.ORG link : CVE-2021-26887
JSON object : View
Products Affected
microsoft
- windows_8.1
- windows_10
- windows_7
- windows_server_2019
- windows_rt_8.1
- windows_server_2012
- windows_server_2008
- windows_server_2016
CWE
CWE-59
Improper Link Resolution Before File Access ('Link Following')