Remote code execution in Windows DNS Server

1) Buffer overflow

EUVDB-ID: #VU29761

Risk: Critical

CVSSv3.1: 9.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:H/RL:O/RC:C]

CVE-ID: CVE-2020-1350

CWE-ID: CWE-119 - Memory corruption

Exploit availability: Yes

Description

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

The vulnerability exists due to a boundary error when processing DNS requests. A remote non-authenticated attacker can send a specially crafted DNS request to the affected DNS server, trigger memory corruption and execute arbitrary code on the target system with privileges 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 Server: 2008 R2 - 2019 2004

CPE2.3

• cpe:2.3:o:microsoft:windows_server:*:*:*:*:*:*:*:
• cpe:2.3:o:microsoft:windows_server:*:*:*:*:*:*:*:
• cpe:2.3:o:microsoft:windows_server:2016:10.0.14393.10:*:*:*:*:*:
• cpe:2.3:o:microsoft:windows_server:2019 2004:*:*:*:*:*:*:

External links

http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1350

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?

Yes. This vulnerability is being exploited in the wild.