Security Advisory

1) Input validation error

Risk: Low

CVSSv3:
4.8 [CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C] [PCI]

CVE-ID:
CVE-2020-1243

CWE-ID:
CWE-20 – Improper Input Validation

Exploit availability:
No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to the Microsoft Hyper-V on a host server fails to properly validate specific malicious data from a user on a guest operating system. A local user can use a specially crafted application and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor’s website.

Vulnerable software versions

Windows:
10 1607, 10 1709, 10 1803, 10 1809, 10 1903, 10 1909, 10 2004

Windows Server:
2016, 2019, 2019 1903, 2019 1909, 2019 2004

CPE

External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1243

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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

2) Buffer overflow

Risk: Low

CVSSv3:
7.7 [CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C] [PCI]

CVE-ID:
CVE-2020-1080

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

Exploit availability:
No

Description

The vulnerability allows a local user to escalate privileges on the target system.

The vulnerability exists due to the Windows Hyper-V on a host server fails to properly handle objects in memory. A local user can trigger memory corruption and gain elevated privileges on the system.

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

Mitigation

Install updates from vendor’s website.

Vulnerable software versions

Windows:
10 1803, 10 1809, 10 1903, 10 1909, 10 2004

Windows Server:
2019, 2019 1903, 2019 1909, 2019 2004

CPE

External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1080

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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

3) Buffer overflow

Risk: Low

CVSSv3:
7.7 [CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C] [PCI]

CVE-ID:
CVE-2020-1047

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

Exploit availability:
No

Description

The vulnerability allows a local user to escalate privileges on the target system.

The vulnerability exists due to the Windows Hyper-V on a host server fails to properly handle objects in memory. A local user can trigger memory corruption and gain elevated privileges on the system.

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

Mitigation

Install updates from vendor’s website.

Vulnerable software versions

Windows:
10 1709, 10 1803, 10 1809, 10 1903, 10 1909, 10 2004

Windows Server:
2019, 2019 1903, 2019 1909, 2019 2004

CPE

External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1047

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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

4) Input validation error

Risk: Medium

CVSSv3:
8.6 [CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C] [PCI]

CVE-ID:
CVE-2020-16891

CWE-ID:
CWE-20 – Improper Input Validation

Exploit availability:
No

Description

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

The vulnerability exists due to insufficient validation of user-supplied input in te Windows Hyper-V on a host server. A remote authenticated attacker can run a specially crafted application and execute arbitrary code on the system.

Mitigation

Install updates from vendor’s website.

Vulnerable software versions

Windows:
7, 8.1, 10, 10 1607, 10 1709, 10 1803, 10 1809, 10 1903, 10 1909, 10 2004

Windows Server:
2008, 2008 R2, 2012, 2012 R2, 2016, 2019, 2019 1903, 2019 1909, 2019 2004

CPE

External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-16891

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user 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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