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CVE Series: Authentication Bypass Leading to Remote Code Execution (RCE) in JetBrains TeamCity (CVE-2024-27198)

Course

CVE-2024-27198 is a critical vulnerability in JetBrains TeamCity, a Java-based open-source automation server used for application building. This flaw allows remote, unauthorized attackers to circumvent authentication, thereby gaining admin control over the server. All versions of TeamCity On-Premises up to 2023.11.3 are affected.

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1

H

25

M
Time

Intermediate

i
Designed for learners who have no prior work experience in IT or Cybersecurity, but are interested in starting a career in this exciting field.
Designed for learners with prior cybersecurity work experience who are interested in advancing their career or expanding their skillset.
Designed for learners with a solid grasp of foundational IT and cybersecurity concepts who are interested in pursuing an entry-level security role.
Experience Level

256

Enrollees

840

XP

1

i

Earn qualifying credits for certification renewal with completion certificates provided for submission.
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Skills you'll gain

Course Outline

1
Module 2: CVE-2024-27198 Exploitation
0
H
40
Min
1
Module 3: CVE-2024-27198 Remediation
0
H
30
Min
1
Module 1: Introduction
H
15
Min

1.1 Introduction to JetBrains TeamCity

Free

20 XP

H

5m

1.2 Root Cause Analysis of CVE-2024-27198

Free

200 XP

H

10m

2.1 Exploiting the vulnerability

Free

200 XP

H

10m

2.2 Lab Exploiting CVE-2024-27198

Free

200 XP

H

30m

3.1 How To Remediate CVE-2024-27198

Free

20 XP

H

15m

3.2 Lab - Implement the patch for CVE-2024-27198

Free

200 XP

H

15m

Module 2: CVE-2024-27198 Exploitation
Heading
Module 1: Introduction
1
Hr
5
Min
Module 3: CVE-2024-27198 Remediation
Heading
Module 1: Introduction
1
Hr
5
Min
Module 1: Introduction
Heading
Module 1: Introduction
1
Hr
5
Min
1.1 Introduction to JetBrains TeamCity

5m

Module 1: Introduction
1.2 Root Cause Analysis of CVE-2024-27198

10m

Module 1: Introduction
2.1 Exploiting the vulnerability

10m

Module 2: CVE-2024-27198 Exploitation
2.2 Lab Exploiting CVE-2024-27198

30m

Module 2: CVE-2024-27198 Exploitation
3.1 How To Remediate CVE-2024-27198

15m

Module 3: CVE-2024-27198 Remediation
3.2 Lab - Implement the patch for CVE-2024-27198

15m

Module 3: CVE-2024-27198 Remediation
Course Description

CVE-2024-27198 is a critical vulnerability in JetBrains TeamCity, a Java-based open-source automation server widely used for application building, testing, and deployment. Rated with a CVSS score of 9.8, this flaw permits remote, unauthorized attackers to circumvent authentication mechanisms, thereby gaining administrative control over the server. Exploiting this vulnerability involves manipulating URL parameters to access authenticated endpoints, allowing the attacker to perform a range of actions, including the addition of administrative users. All versions of TeamCity On-Premises up to 2023.11.3 are affected. The vulnerability's root cause is the inadequate validation and handling of parameters within URL requests, which leads to an authentication bypass. In this course you’ll explore, exploit, and remediate this CVE.

Target Audience

This course is for seasoned red teamers, penetration testers, security and vulnerability assessment analysts, developers, and system administrators who want to know how to exploit and protect against the latest vulnerabilities impacting enterprise systems.

Course Level

Intermediate

Prerequisites

A basic understanding of the Linux command line, networking, and Python.

Helpful Links

  • CVE Entry: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-27198 (Official CVE)
  • NIST Entry: https://nvd.nist.gov/vuln/detail/CVE-2024-27198
  • Security Advisory: https://blog.jetbrains.com/teamcity/2024/03/additional-critical-security-issues-affecting-teamcity-on-premises-cve-2024-27198-and-cve-2024-27199-update-to-2023-11-4-now/
  • Rapid7 Blog: https://www.rapid7.com/blog/post/2024/03/04/etr-cve-2024-27198-and-cve-2024-27199-jetbrains-teamcity-multiple-authentication-bypass-vulnerabilities-fixed/
  • Dark Reading: https://www.darkreading.com/cyberattacks-data-breaches/jetbrains-teamcity-mass-exploitation-underway-rogue-accounts-thrive
  • Exploit: https://github.com/W01fh4cker/CVE-2024-27198-RCE https://packetstormsecurity.com/files/177601/JetBrains-TeamCity-Unauthenticated-Remote-Code-Execution.html

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    Instructors

    Clint Kehr
    Ethical Hacker
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    Learn

    Learn core concepts and get hands-on with key skills.

    Practice

    Exercise your problem-solving and creative thinking skills with security-centric puzzles

    Prove

    Assess your knowledge and skills to identify areas for improvement and measure your growth

    Get Hands-on Learning

    Put your skills to the test in virtual labs, challenges, and simulated environments.

    Measure Your Progress

    Track your skills development from lesson to lesson using the Cybrary Skills Tracker.

    Connect with the Community

    Connect with peers and mentors through our supportive community of cybersecurity professionals.

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    CVE Series: Authentication Bypass Leading to Remote Code Execution (RCE) in JetBrains TeamCity (CVE-2024-27198)

    CVE-2024-27198 is a critical vulnerability in JetBrains TeamCity, a Java-based open-source automation server used for application building. This flaw allows remote, unauthorized attackers to circumvent authentication, thereby gaining admin control over the server. All versions of TeamCity On-Premises up to 2023.11.3 are affected.

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    1
    H 
    25
    M
    Time
    Intermediate
    difficulty
    1
    ceu/cpe

    Course Content

    Course Description

    CVE-2024-27198 is a critical vulnerability in JetBrains TeamCity, a Java-based open-source automation server widely used for application building, testing, and deployment. Rated with a CVSS score of 9.8, this flaw permits remote, unauthorized attackers to circumvent authentication mechanisms, thereby gaining administrative control over the server. Exploiting this vulnerability involves manipulating URL parameters to access authenticated endpoints, allowing the attacker to perform a range of actions, including the addition of administrative users. All versions of TeamCity On-Premises up to 2023.11.3 are affected. The vulnerability's root cause is the inadequate validation and handling of parameters within URL requests, which leads to an authentication bypass. In this course you’ll explore, exploit, and remediate this CVE.

    Target Audience

    This course is for seasoned red teamers, penetration testers, security and vulnerability assessment analysts, developers, and system administrators who want to know how to exploit and protect against the latest vulnerabilities impacting enterprise systems.

    Course Level

    Intermediate

    Prerequisites

    A basic understanding of the Linux command line, networking, and Python.

    Helpful Links

  • CVE Entry: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-27198 (Official CVE)
  • NIST Entry: https://nvd.nist.gov/vuln/detail/CVE-2024-27198
  • Security Advisory: https://blog.jetbrains.com/teamcity/2024/03/additional-critical-security-issues-affecting-teamcity-on-premises-cve-2024-27198-and-cve-2024-27199-update-to-2023-11-4-now/
  • Rapid7 Blog: https://www.rapid7.com/blog/post/2024/03/04/etr-cve-2024-27198-and-cve-2024-27199-jetbrains-teamcity-multiple-authentication-bypass-vulnerabilities-fixed/
  • Dark Reading: https://www.darkreading.com/cyberattacks-data-breaches/jetbrains-teamcity-mass-exploitation-underway-rogue-accounts-thrive
  • Exploit: https://github.com/W01fh4cker/CVE-2024-27198-RCE https://packetstormsecurity.com/files/177601/JetBrains-TeamCity-Unauthenticated-Remote-Code-Execution.html
    • This course is part of a Career Path:
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    Certificate of Completion

    Complete this entire course to earn a CVE Series: Authentication Bypass Leading to Remote Code Execution (RCE) in JetBrains TeamCity (CVE-2024-27198) Certificate of Completion

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    Cybrary Career Paths are comprehensive training programs designed to prepare you for the most in-demand roles in the cybersecurity workforce. Each path follows a Learn, Practice, Prove model and includes different activity types aligned to key topics within the path’s security domain. As you progress through the path, your progress will be measured in real time using Experience Points (XP) that serve as a comprehensive capability score for each topic. Upon completing all of the requirements for a path, you will be rewarded with a shareable digital badge via Credly.
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    Overview

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    Foundations
    Focused on the core IT competencies that cybersecurity professionals need to succeed in any career path.
    Defensive Security
    Focused on trying to find the bad guys. Topics such as threat intelligence, threat hunting, network monitoring, incident response. Defensive security is a reactive measure taken once a vulnerability is found through prevention, detection, and response.
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    Offensive Security
    Focused on validating security controls by trying to break them (i.e. penetration testing or ethical hacking). Topics such as Kali Linux, metasploit, scanning, and privilege escalation. Offensive security seeks out the problem or vulnerability through ethical hacking and finds a solution to disable the operation.
    Offensive Security
    Focused on the core IT competencies that cybersecurity professionals need to succeed in any career path.
    Path Outline

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