Remote code execution in Microsoft Remote Desktop Client and Hyper-V Viewer
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2021-34535 |
| CWE-ID | CWE-94 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
Windows Operating systems & Components / Operating system Windows Server Operating systems & Components / Operating system |
| Vendor | Microsoft |
Security Bulletin
This security bulletin contains one high risk vulnerability.
1) Code Injection
EUVDB-ID: #VU55714
Risk: High
CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-34535
CWE-ID:
CWE-94 - Improper Control of Generation of Code ('Code Injection')
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to improper input validation in the Remote Desktop Client and Hyper-V Viewer. A remote attacker can send a specially crafted request and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
MitigationInstall updates from vendor's website.
Vulnerable software versionsWindows: 7 - 10 S
Windows Server: 2008 R2 - 2019 2004
CPE2.3- cpe:2.3:o:microsoft:windows:10 1809:10.0.17763.1:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows:10 1909:10.0.18363.476:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows:10 2004:10.0.19041.264:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows:10 20H2:10.0.19042.572:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows:10 1607:10.0.14393.10:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows:8.1 RT:*:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows:10 21H1:10.0.19043.985:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows:10:S:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows:10 1507:10.0.10240.16405:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows:10:Mobile:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows:10 1903:10.0.18362.116:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows:10 1803:10.0.17134.48:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows:10 1709:10.0.16299.19:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows:10 1703:10.0.15063.138:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows:10 1511:10.0.10586.3:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows:10:Gold:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_server:2019:10.0.17763.1:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_server:2016:10.0.14393.10:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_server:2008 R2:*:*:*:*:*:*:*
http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34535
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.
