SB2021070204 - Remote code execution in Microsoft Windows Print Spooler

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Main Vulnerability Database SB2021070204

SB2021070204 - Remote code execution in Microsoft Windows Print Spooler

Published: July 2, 2021 Updated: September 6, 2022

Security Bulletin ID SB2021070204
Severity
Critical
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

Critical 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 security vulnerability.


1) Code Injection (CVE-ID: CVE-2021-34527)

The vulnerability allows a remote user to execute arbitrary code on the target system.

The vulnerability exists due to improper input validation within the RpcAddPrinterDriverEx() function. A remote user can send a specially crafted request to the Windows Print Spooler and execute arbitrary code with SYSTEM privileges.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Note, the vulnerability is being considered a zero-day and dubbed PrintNightmare. This is a different vulnerability than #VU54508 (CVE-2021-1675).



Remediation

Install update from vendor's website.

References