Denial of service in Microsoft .NET
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2022-21986 |
| CWE-ID | CWE-20 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
Microsoft .NET Core Server applications / Frameworks for developing and running applications Visual Studio Universal components / Libraries / Software for developers |
| Vendor | Microsoft |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
1) Input validation error
EUVDB-ID: #VU60380
Risk: Medium
CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2022-21986
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 ASP.NET Core Krestel when pooling HTTP/2 and HTTP/3 headers. A remote 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 .NET Core: 5.0.0 - 6.0.0
Visual Studio: 16.0.0 16.0.28729.10 - 2019 for Mac version 8.10
External linkshttp://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2022-21986
http://bugzilla.redhat.com/show_bug.cgi?id=2051490
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.
