Risk | Medium |
Patch available | YES |
Number of vulnerabilities | 1 |
CVE ID | CVE-2021-1636 |
CWE ID | CWE-20 |
Exploitation vector | Network |
Public exploit | N/A |
Vulnerable software Subscribe |
Microsoft SQL Server Server applications / Database software |
Vendor | Microsoft |
This security advisory describes one medium risk vulnerability.
Risk: Medium
CVSSv3: 7.7 [CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C] [PCI]
CVE-ID: CVE-2021-1636
CWE-ID:
CWE-20 - Improper Input Validation
Exploit availability: No
DescriptionThe vulnerability allows a remote user to escalate privileges on the system.
The vulnerability exists due to insufficient validation of user-supplied input, when the affected SQL Server is configured to run an Extended Event session. A remote user can send specially crafted data to the server and execute arbitrary code with elevated privileges.
Install updates from vendor's website.
Vulnerable software versionsMicrosoft SQL Server: 2012, 2014 Service Pack 3, 2016, 2017, 2019
CPEhttps://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-1636
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.
How the attacker can exploit this vulnerability?
The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.