Remote code execution in Windows DNSAPI



Published: 2017-10-10
Risk High
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2017-11779
CWE-ID CWE-20
Exploitation vector Network
Public exploit N/A
Vulnerable software
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Windows
Operating systems & Components / Operating system

Windows Server
Operating systems & Components / Operating system

Vendor Microsoft

Security Bulletin

This security bulletin contains one high risk vulnerability.

1) Improper input validation

EUVDB-ID: #VU8779

Risk: Low

CVSSv3.1: 8.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-11779

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists in Windows Domain Name System (DNS) DNSAPI.dll when it fails to properly handle DNS responses. A remote attacker can corrupted DNS responses to DNS server and execute arbitrary code in the context of the Local System Account.

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

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Windows: 8.1 - 10

Windows Server: 2012 - 2016

External links

http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11779


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.



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