Security restrictions bypass in Windows Device Guard

Published: 2019-02-13
Severity 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 Subscribe
Windows Server
Vendor Microsoft

Security Advisory

1) Permissions, Privileges, and Access Controls

Severity: Low

CVSSv3: 6.8 [CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2019-0627

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

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, 10 1607, 10 1703, 10 1709, 10 1803, 10 1809

Windows Server: 1709, 1803, 2016, 2019

CPE 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

Severity: Low

CVSSv3: 6.8 [CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2019-0632

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

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, 10 1607, 10 1703, 10 1709, 10 1803, 10 1809

Windows Server: 1709, 1803, 2016, 2019

CPE 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

Severity: Low

CVSSv3: 6.8 [CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2019-0631

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

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, 10 1607, 10 1703, 10 1709, 10 1803, 10 1809

Windows Server: 1709, 1803, 2016, 2019

CPE 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.