Vulnerability identifier: #VU11728

Vulnerability risk: Medium

CVSSv3.1: 7.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-0956

CWE-ID: CWE-20

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 perform a denial of service (DoS) attack.

The vulnerability exists due to an error within the the HTTP 2.0 protocol stack (HTTP.sys) when processing HTTP 2.0 requests. A remote attacker can send a specially crafted HTTP 2.0 request to the affected system and cause the system to crash.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Windows: 10

Windows Server: 2016

Microsoft IIS: 10.0

---

External links
http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0956

---

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.