SB2020112601 - Privilege escalation in Microsoft Windows

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Main Vulnerability Database SB2020112601

SB2020112601 - Privilege escalation in Microsoft Windows

Published: November 26, 2020

Security Bulletin ID SB2020112601
CSH Severity
Low
Patch available
NO
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Code execution

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Security restrictions bypass (CVE-ID: N/A)

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

CVSSv4: 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:P/U:Clear


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

The vulnerability exists due to incorrect permissions set for two registry keys for the RPC Endpoint Mapper and DNSCache services. A local user can modify keys a leverage behavior of other system services to load a malicious DLL and execute arbitrary code with SYSTEM privileges.

Affected registry keys are:

  • HKLMSYSTEMCurrentControlSetServicesRpcEptMapper
  • HKLMSYSTEMCurrentControlSetServicesDnscache



Remediation

Cybersecurity Help is not aware of any official remediation provided by the vendor.

References