Denial of service in Microsoft SharePoint
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2021-28450 |
| CWE-ID | CWE-20 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
Microsoft SharePoint Server Server applications / Application servers Microsoft SharePoint Foundation Server applications / Application servers |
| Vendor | Microsoft |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
1) Input validation error
EUVDB-ID: #VU52171
Risk: Medium
CVSSv3.1: 4.4 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:L/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-28450
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient validation of user-supplied input in Microsoft SharePoint. A remote authenticated attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.
MitigationInstall updates from vendor's website.
Vulnerable software versionsMicrosoft SharePoint Server: 2013 - 2019
Microsoft SharePoint Foundation: 2010 Service Pack 2
External linkshttp://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-28450
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
