Cozy Bear, a threat group linked with the Russian foreign intelligence service (SVR), has been conducting a global hacking campaign targeting servers hosting JetBrains TeamCity software, according to US, UK and Polish government agencies.
In a joint advisory published on December 13, 2023, six security and intelligence agencies in the US, the UK and Poland warned that Cozy Bear has been exploiting an authentication bypass vulnerability in TeamCity (CVE-2023-42793) since at least September 2023.
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