Nouman Rahman
ProgrammingFire

ProgrammingFire

picoCTF 2022: Binary Exploitation: CVE-XXXX-XXXX

picoCTF 2022: Binary Exploitation: CVE-XXXX-XXXX

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Nouman Rahman
·Oct 15, 2022·

2 min read

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Table of contents

  • Introduction
  • Solution
  • Conclusion

Introduction

Challenge: CVE-XXXX-XXXX

Category: Binary Exploitation

Description:

Enter the CVE of the vulnerability as the flag with the correct flag format: picoCTF{CVE-XXXX-XXXXX} replacing XXXX-XXXXX with the numbers for the matching vulnerability. The CVE we're looking for is the first recorded remote code execution (RCE) vulnerability in 2021 in the Windows Print Spooler Service, which is available across desktop and server versions of Windows operating systems. The service is used to manage printers and print servers.

Solution

This one is actually a pretty simple and straightforward challenge. We need to find the CVE of the first recorded remote code execution (RCE) vulnerability in 2021 in the Windows Print Spooler Service. For this, we can just Google it. I Googled "first recorded remote code execution (RCE) vulnerability in 2021 in the Windows Print Spooler Service" and got my result, which is CVE-2021-34527. So we got our flag which is picoCTF{CVE-2021-34527}. Okay, so, now let's explore more.

What is CVE? CVE, short for Common Vulnerabilities and Exposures, is a list of publicly disclosed computer security flaws.

What is Remote Code Execution? Remote code execution (RCE) attacks allow an attacker to remotely execute malicious code on a computer. The impact of an RCE vulnerability can range from malware execution to an attacker gaining complete control over a compromised machine.

What is the PrintNightmare (CVE-2021-34527)? PrintNightmare (CVE-2021-34527) is a vulnerability that allows an attacker with a regular user account to take over a server running the Windows Print Spooler service. This service runs on all Windows servers and clients by default, including domain controllers, in an Active Directory environment.

Conclusion

Basically, In this article, we learned about CVE, RCE, and PrintNightmare Vulnerability. And we have found our flag by using the CVE number.

Flag: picoCTF{CVE-2021-34527}

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