Remote code execution in Windows DNS Server



Published: 2020-07-14
Risk Critical
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2020-1350
CWE-ID CWE-119
Exploitation vector Network
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
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Windows Server
Operating systems & Components / Operating system

Vendor Microsoft

Security Bulletin

This security bulletin contains one critical risk vulnerability.

1) Buffer overflow

EUVDB-ID: #VU29761

Risk: Critical

CVSSv3.1: 9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2020-1350

CWE-ID: CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer

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, 2008 R2, 2012, 2012 R2, 2016, 2019, 2019 1903, 2019 1909, 2019 2004

CPE2.3 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?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.



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