JetBrains - Authentication Bypass (CVE-2023-42793)

CVE-2023-42793 is a critical vulnerability in JetBrains TeamCity, where an authentication bypass can enable remote code execution on the TeamCity server.

CrowdSec has been tracking this vulnerability and its exploits since 15th of December 2023.

Insights from the CrowdSec network reveal that the attackers trying to exploit CVE-2023-42793 are composed of a fairly even mix of opportunistic and targeted actors. Some attackers employ preliminary reconnaissance, while others use indiscriminate scanning. In addition, according to the CrowdSec network, attack volume against CVE-2023-42793 has dipped slightly compared to the previous week. Although still commonly targeted, the decline suggests a cooling-off period. Long-term relevance remains, but attention is waning.

Attack attempts aim to exploit weaknesses in the TeamCity authentication process, usually by targeting exposed server endpoints in tailored campaigns.