Authentication Bypass Leads to Remote Code Execution in JetBrains TeamCity Before 2023.05.4
CVE-2023-42793

9.8CRITICAL

Key Information:

Vendor
Jetbrains
Status
Teamcity
Vendor
CVE Published:
19 September 2023

Badges

💰 Ransomware👾 Exploit Exists🟡 Public PoC🟣 EPSS 97%🦅 CISA Reported📰 News Worthy

Summary

An authentication bypass vulnerability was discovered in JetBrains TeamCity versions before 2023.05.4, which could allow attackers to gain unauthorized access to the TeamCity server. This flaw could potentially enable remote code execution (RCE) by exploiting the security weaknesses present in the server's authentication mechanisms. Organizations using affected versions are urged to apply the necessary patches to mitigate the risk.

CISA Reported

CISA provides regional cyber and physical services to support security and resilience across the United States. CISA monitor the most dangerious vulnerabilities and have identifed as being exploited and is known by the CISA as enabling ransomware campaigns.

The CISA's recommendation is: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Affected Version(s)

TeamCity 0 < 2023.05.4

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2023-42793
Created by H454NSec

CVE-2023-42793
Created by Zenmovie

CVE-2023-42793
Created by Zyad-Elsayed

News Articles

Patch Now: Critical TeamCity Bug Allows for Server Takeovers

Cyberattackers can exploit a vulnerability in JetBrain's continuous integration and delivery (CI/CD) server (APT target) to gain administrative control.

favicon imageBeeping Computers

JetBrains warns of new TeamCity auth bypass vulnerability

JetBrains urged customers today to patch their TeamCity On-Premises servers against a critical authentication bypass vulnerability that can let attackers take over vulnerable instances with admin privileges.

favicon imageDark Reading

'Midnight Blizzard' Breached HPE Email Months Before Microsoft Hack

The Russian APT behind the SolarWinds attacks exfiltrated data from HPE email accounts last May.

References

https://www.jetbrains.com/privacy-security/issues-fixed/
https://blog.jetbrains.com/teamcity/2023/09/cve-2023-4279...
http://packetstormsecurity.com/files/174860/JetBrains-Tea...

EPSS Score

97% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 📰

    First article discovered by Matrice Digitale

  • 💰

    Used in Ransomware

  • 👾

    Exploit known to exist

  • 🦅

    CISA Reported

  • Vulnerability published

  • Vulnerability Reserved

.