CISA Warns of Actively Exploited JetBrains TeamCity Vulnerability

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Thursday extra a critical security flaw impacting JetBrains TeamCity On-Premises program to its Recognized Exploited Vulnerabilities (KEV) catalog, based on proof of active exploitation.

The vulnerability, tracked as CVE-2024-27198 (CVSS rating: 9.8), refers to an authentication bypass bug that makes it possible for for a entire compromise of a prone server by a distant unauthenticated attacker.

It was tackled by JetBrains earlier this 7 days together with CVE-2024-27199 (CVSS score: 7.3), a different average-severity authentication bypass flaw that will allow for a “limited sum” of info disclosure and process modification.

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“The vulnerabilities might allow an unauthenticated attacker with HTTP(S) entry to a TeamCity server to bypass authentication checks and gain administrative handle of that TeamCity server,” the firm observed at the time.

Risk actors have been noticed weaponizing the twin flaws to produce Jasmin ransomware as perfectly as build hundreds of rogue consumer accounts, in accordance to CrowdStrike and LeakIX. The Shadowserver Foundation claimed it detected exploitation tries starting off from March 4, 2024.

Stats shared by GreyNoise display that CVE-2024-27198 has occur less than wide exploitation from above a dozen exceptional IP addresses shortly soon after community disclosure of the flaw.

In gentle of energetic exploitation, consumers managing on-premises versions of the software package are recommended to use the updates as soon as achievable to mitigate potential threats. Federal businesses are demanded to patch their instances by March 28, 2024.

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