Denial of service in Microsoft IIS Server



Published: 2019-06-12
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2019-0941
CWE-ID CWE-20
Exploitation vector Network
Public exploit N/A
Vulnerable software
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Microsoft IIS
Server applications / Web servers

Windows
Operating systems & Components / Operating system

Windows Server
Operating systems & Components / Operating system

Vendor Microsoft

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Input validation error

EUVDB-ID: #VU18777

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 - Improper input validation

Exploit availability: No

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: 7 - 10 1903

Windows Server: 2008 - 2019 1903

External links

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


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker 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.



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