Vulnerability identifier: #VU21646

Vulnerability risk: Medium

CVSSv3.1: 6.7 [CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2019-1365

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: No

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

Vendor: Microsoft

Description

The vulnerability allows a remote attacker to escalate privileges on the system.

The vulnerability exists due to a boundary error when Microsoft IIS Server fails to check the length of a buffer prior to copying memory to it. A remote authenticated user can use a specially crafted application to trigger memory corruption and execute arbitrary code in the context of NT AUTHORITY\system escaping the Sandbox.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Windows: 7, 8.1 - 8.1 RT, 10 1607 - 10 1903

Windows Server: 2008 - 2019 1903

Microsoft IIS: 7.5 - 10.0

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External links
http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1365

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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. However, proof of concept for this vulnerability is available.