Multiple vulnerabilities in Microsoft Windows Update Client

Published: 2019-10-09 | Updated: 2019-10-09
Severity Low
Patch available YES
Number of vulnerabilities 3
CVE ID CVE-2019-1323
CVE-2019-1336
CVE-2019-1337
CWE ID CWE-264
CWE-125
CWE-200
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: 6.1 [CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:L/I:H/A:L/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2019-1323

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

Description

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

The vulnerability exists due to Windows Update Client does not properly handle privileges. A local authenticated user can run a specially crafted application and run processes in an elevated context.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Windows: 10 1809, 10 1903

Windows Server: 1903, 2019

CPE External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1323

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

CVE-ID: CVE-2019-1336

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

Description

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

The vulnerability exists due to Windows Update Client does not properly handle privileges. A local authenticated user can run a specially crafted application and run processes in an elevated context.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Windows: 10 1809, 10 1903

Windows Server: 1903, 2019

CPE External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1336

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) Out-of-bounds read

Severity: Low

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

CVE-ID: CVE-2019-1337

CWE-ID: CWE-125 - Out-of-bounds Read

Description

The vulnerability allows a local user to gain access to potentially sensitive information.

The vulnerability exists due to Windows Update Client fails to properly handle objects in memory. A local authenticated user can use a specially crafted application to trigger out-of-bounds read error and read contents of an elevated process.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Windows: 10 1809, 10 1903

Windows Server: 1903, 2019

CPE External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1337

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.