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CVE-2023-42793

JetBrains — JetBrains TeamCity Authentication Bypass Vulnerability

JetBrains · CWE-288 | CWE-306 · in CISA KEV since 2023-10-04

ExigentKEV since 2023 · listed over a yearRansomwareCISA KEVActively Exploited
94

EVRS 94 of 100 Immediate

Out-of-Band / Urgent Remediation

Rank 35 of 2,960 tracked

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Why it scores 94

Evidence available: 6 of 7 signals

Listed in the CISA KEV catalog, and associated with known ransomware campaigns.

  • CISA KEVApplied
  • RansomwareApplied
  • Vendor exploitationDid not apply
  • EPSSApplied
  • Microsoft Exploitability IndexNot applicable
  • Pre-patch disclosureNo data
  • KEV recencyDid not apply
  • CVSSApplied

The band answers “how soon”, not “how bad”. No data for: Pre-patch disclosure. Why some signals show no data

Fix

Patch or fixed version identified

CISA required action

Fixed in

teamcity: update to 2023.05.4 or later

Affected versions

  • teamcity< 2023.05.4

Remediation

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Fixed versions from NVD.

Evidence

Each value with its source
MeasureValueSource
CVSS base scoreHow severe the flaw is in itself. It does not say how likely an attack is. 9.8 NVD
FIRST EPSSFIRST's estimate of the chance this is exploited in the next 30 days, and how that ranks against all CVEs. 0.999 (99.98th pctl) FIRST EPSS
Actively exploitedWhether a source of record has confirmed attacks using it in the wild. Confirmed CISA KEV
Ransomware campaign useWhether CISA has seen ransomware operators use it. Known CISA KEV
CISA remediation deadlineThe date US federal agencies must have fixed or mitigated it. 2023-10-25 · KEV since 2023 · listed over a year CISA KEV
Public exploit moduleA module existing is not the same as active exploitation. Public module exists Metasploit
EUVD cross-referenceENISA's record: CVSS 9.8 (v3.1), assigned by JetBrains. Listed ENISA EUVD

Description

NVD

In JetBrains TeamCity before 2023.05.4 authentication bypass leading to RCE on TeamCity Server was possible

What CISA says to do

Public module

Metasploit lists a public excellent-rank module for this CVE: JetBrains TeamCity Unauthenticated Remote Code Execution (multi/http/jetbrains_teamcity_rce_cve_2023_42793). A module existing is not the same as active exploitation; see metasploit.com.