Privilege escalation in Windows Print Spooler service
| Risk | Medium |
| Patch available | NO |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2021-36958 |
| CWE-ID | CWE-732 |
| Exploitation vector | Local |
| Public exploit | Public exploit code for vulnerability #1 is available. |
| Vulnerable software |
Windows Operating systems & Components / Operating system Windows Server Operating systems & Components / Operating system |
| Vendor | Microsoft |
Security Bulletin
This security bulletin contains information about 1 vulnerabilities.
Updated: 12.08.2021
Updated vulnerability description to remove remote exploitation vector, changed bulletin title, lowered bulletin risk level from Critical to Medium.
1) Incorrect permission assignment for critical resource
EUVDB-ID: #VU55790
Risk: Medium
CVSSv4.0: 7.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Green]
CVE-ID: CVE-2021-36958
CWE-ID:
CWE-732 - Incorrect Permission Assignment for Critical Resource
Exploit availability: No
DescriptionThe vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists in Windows Print Spooler service due to improperly performed privileged file operations. A local user can send a specially crafted request to the Print Spooler service and execute arbitrary code with SYSTEM privileges.
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.
Vulnerable software versionsWindows: 10 S - 10
Windows Server: 2019 10.0.17763.1 - 2019 2004
CPE2.3- cpe:2.3:o:microsoft:windows:10:S:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows:10:Mobile:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows:10:Gold:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows:10_20H2:10.0.19042.572:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows:10_21H1:10.0.19043.985:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows:10_1507:10.0.10240.16405:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows:10_1511:10.0.10586.3:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows:10_1607:10.0.14393.10:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows:10_1703:10.0.15063.138:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows:10_1709:10.0.16299.19:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_server:2019_2004:*:*:*:*:*:*:*
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-36958
https://twitter.com/gentilkiwi/status/1416429860566847490
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.
