Vulnerability identifier: #VU18777

Vulnerability 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-2019-0941

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Microsoft IIS
Server applications / Web servers
Windows
Operating systems & Components / Operating system
Windows Server
Operating systems & Components / Operating system

Vendor: Microsoft

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input within the filtering feature. A remote attacker can send a specially crafted request to the affected Microsoft IIS server and perform a denial of service attack against pages, configured to use request filtering.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Microsoft IIS: 8.5 - 10.0

Windows: 8.1 - 8.1 RT, 7, 10 - 10 1903

Windows Server: 2008 - 2019 1903

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External links
http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0941

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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.