Remote code execution in Microsoft iSNS Server
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2021-43215 |
| CWE-ID | CWE-119 |
| 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) Buffer overflow
EUVDB-ID: #VU58957
Risk: High
CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-43215
CWE-ID:
CWE-119 - Memory corruption
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error in iSNS Server. A remote attacker can send a specially crafted request, trigger memory corruption 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 - 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 21H2:10.0.19044.1288:*:*:*:*:*:*
- 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:2019 2004:*:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_server:2019 20H2:*:*:*:*:*:*:*
http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-43215
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.
