Arbitrary code execution in Windows Server DHCP

1) Improper input validation

EUVDB-ID: #VU8319

Risk: Low

CVSSv3.1: 8.3 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-8686

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows an adjacent attacker to execute arbitrary code on the target system.

The vulnerability exists in the Windows Server DHCP service due to improper validation of user-supplied input. An adjacent attacker can send specially crafted packets to a DHCP failover server and run arbitrary code on the DHCP failover server or cause the DHCP service to become nonresponsive.

Successful exploitation of this vulnerability may result in system compromise.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Windows Server: 2012 - 2016 10.0.14393.10

External links

http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-8686

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.