Privilege escalation in Microsoft Windows DNS

Published: 2019-07-10 | Updated: 2019-07-10
Severity Low
Patch available YES
Number of vulnerabilities 1
CVE ID CVE-2019-1090
CWE ID CWE-119
Exploitation vector Local
Public exploit N/A
Vulnerable software Windows Subscribe
Windows Server
Vendor Microsoft

Security Advisory

This security advisory describes one low risk vulnerability.

1) Buffer overflow

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-2019-1090

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

Description

The vulnerability allows a local user to escalate privilege so the system.

The vulnerability exists due to a boundary error in the dnsrslvr.dll when handling objects in memory in Microsoft Windows DNS. A local user can create a specially crafted application, trigger memory corruption and execute arbitrary code on the target system with elevated privileges.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Windows: 10 1803, 10 1809, 10 1903

Windows Server: 1803, 1903, 2019

CPE External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1090

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.