#VU13778 Improper input validation


Published: 2018-07-10 | Updated: 2018-07-10

Vulnerability identifier: #VU13778

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-2018-8206

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 cause DoS condition on the target system.

The weakness exists due to improper handling of File Transfer Protocol (FTP) connections. A remote attacker can send specially crafted packets to a Windows computer with the FTP Server role enabled that is accepting connections on TCP port 21 and cause a target system to stop responding.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Windows: 8.1 - 8.1 RT, 7

Windows Server: 2008 - 2016 10.0.14393.10

Microsoft IIS: 7.5 - 10.0

External links
http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8206

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.


Latest bulletins with this vulnerability


Denial of service in Windows FTP Server