Actively exploited · Published Sep 19, 2023 · Assigned by JetBrains
CVE-2023-42793
Critical 9.8 Exploited Ransomware
In plain English
A critical-severity authentication bypass in TeamCity from JetBrains. Attackers are actively exploiting it in the wild (listed by CISA on October 4, 2023). It has been used in ransomware campaigns. The chance it is exploited in the next 30 days is estimated at 100.0% (higher than 99.9% of all known vulnerabilities). Ready-made attack tooling exists: Metasploit, Nuclei, public proof-of-concept code. Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
CISA guidance
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Federal agencies must remediate by Oct 25, 2023.
Official description
In JetBrains TeamCity before 2023.05.4 authentication bypass leading to RCE on TeamCity Server was possible
Affected products (as reported)
Weakness: CWE-288 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
References
- https://www.jetbrains.com/privacy-security/issues-fixed/
- https://blog.jetbrains.com/teamcity/2023/09/cve-2023-42793-vulnerability-post-mortem/
- http://packetstormsecurity.com/files/174860/JetBrains-TeamCity-Unauthenticated-Remote-Code-Execution.html
- https://attackerkb.com/topics/1XEEEkGHzt/cve-2023-42793
- https://www.securityweek.com/recently-patched-teamcity-vulnerability-exploited-to-hack-servers/
- https://www.rapid7.com/blog/post/2023/09/25/etr-cve-2023-42793-critical-authentication-bypass-in-jetbrains-teamcity-ci-cd-servers/
- https://www.sonarsource.com/blog/teamcity-vulnerability/
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-42793 government-resource