Security restrictions bypass in Windows Device Guard

1) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU17646

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2019-0627

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a local user to bypass certain security restrictions.

The vulnerability exists due to an error in Device Guard that can circumvent a User Mode Code Integrity (UMCI) policy on the machine. A local user can create a specially crafted program, bypass the User Mode Code Integrity policy and executed malicious application on the system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Windows: 10 1607 10.0.14393.10 - 10

Windows Server: 2016 10.0.14393.10 - 2019 1803

CPE2.3

External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0627

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) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU17647

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2019-0632

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a local user to bypass certain security restrictions.

The vulnerability exists due to an error in Device Guard that can circumvent a User Mode Code Integrity (UMCI) policy on the machine. A local user can create a specially crafted program, bypass the User Mode Code Integrity policy and executed malicious application on the system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Windows: 10 1607 10.0.14393.10 - 10

Windows Server: 2016 10.0.14393.10 - 2019 1803

CPE2.3

External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0632

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) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU17648

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2019-0631

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a local user to bypass certain security restrictions.

The vulnerability exists due to an error in Device Guard that can circumvent a User Mode Code Integrity (UMCI) policy on the machine. A local user can create a specially crafted program, bypass the User Mode Code Integrity policy and executed malicious application on the system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Windows: 10 1607 10.0.14393.10 - 10

Windows Server: 2016 10.0.14393.10 - 2019 1803

CPE2.3

External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0631

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.

Risk	Low
Patch available	YES
Number of vulnerabilities	3
CVE-ID	CVE-2019-0627 CVE-2019-0632 CVE-2019-0631
CWE-ID	CWE-264
Exploitation vector	Local
Public exploit	N/A
Vulnerable software	Windows Operating systems & Components / Operating system Windows Server Operating systems & Components / Operating system
Vendor	Microsoft